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Home Theater => Audio => Amplifier => Topic started by: romymartinez on Nov 06, 2017 at 12:28 PM

Title: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 06, 2017 at 12:28 PM
I am planning to have this preamp built. I am starting this thread  hoping to generate interest on possible group buy of the PCB. The gerber files for the PCB and the bill of materials for the parts are available from the threads below. The DOST-EPDC can make the PCB for a minimum number of 4 units. They can also provide service for soldering the SMD  (and even trough hole) parts for us whose with no soldering skills. :D

http://www.diyaudio.com/forums/group-buys/279981-bruno-putzeys-balanced-preamp-buy.html
http://www.diyaudio.com/forums/group-buys/287508-bruno-putzeys-balanced-preamp-buy-2-a.html
http://www.diyaudio.com/forums/group-buys/298657-bruno-putzeys-balanced-preamp-buy-3-a.html

All components in the published bill of materials (or its equivalent) are locally available through RS and Element14,.

Cost? In my intitial query DOST-EBDC said it will be at least 2.4K for  4 PCBs (P600 each). Components from RS and Farnell would cost around 4K. This excludes the transformer (2x15V 15-30VA), enclusre, (and the drilling/cutting/CNC), IEC, pilot light and some other minor components and labor services for us with no skills. :D


From Bruno Putzey's article:

Quote

"I have a double agenda in presenting this demonstration project. Firstly just to demonstrate how the "new" design methodology works in practice, but secondly to invite doubters to discover for themselves how a bit of rational engineering can produce staggeringly good sonics without resorting to boutique parts or boutique thinking. This is going to be the cheapest and best-sounding preamplifier you've ever built."


:D
Title: Re: Bruno Putzey's Balanced Preamp
Post by: rochie on Nov 06, 2017 at 02:52 PM
what is the size of the pcb? 600 php for 1 pcb is kinda steep, I had mine fabricated by my friend in China for only a fraction of that cost. this looks like a god project as I still have 2 torroid with the same specs  that I got from Mouser few months ago
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 06, 2017 at 02:58 PM
Images from the diyaudio.com group buy

(http://photos.xavimages.co.uk/photos/i-wTH22SQ/0/X3/i-wTH22SQ-X3.jpg)
Title: Re: Bruno Putzey's Balanced Preamp
Post by: tony on Nov 06, 2017 at 04:48 PM
what is the size of the pcb? 600 php for 1 pcb is kinda steep, I had mine fabricated by my friend in China for only a fraction of that cost. this looks like a god project as I still have 2 torroid with the same specs  that I got from Mouser few months ago

same project as diyaudio? Dandy Menor can design a balanced input/output line amp easy...i have a pair of balanced input output XLR boards from thailand, i forgot how much i got them for....doesn't cost that much...
Title: Re: Bruno Putzey's Balanced Preamp
Post by: rochie on Nov 06, 2017 at 05:08 PM
same project as diyaudio? Dandy Menor can design a balanced input/output line amp easy...i have a pair of balanced input output XLR boards from thailand, i forgot how much i got them for....doesn't cost that much...
different project sir tony, but I had my Objective 2 HP amp board and Sapphire amp by RJM from diyaudio fabricated via dandy for a fraction of a cost.
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 06, 2017 at 07:49 PM
Hi Sir Rochie, the dimensions are 49 mm by 140 mm. :D

If you know where I (or the GB if materializes) can have it built much cheaper then your help will be very much appreciated. :D

Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 06, 2017 at 11:09 PM
The main reference article from Bruno Putzey:
https://www.edn.com/Pdf/ViewPdf?contentItemId=4431638

The main discussion thread in diyaudio.com
http://www.diyaudio.com/forums/analog-line-level/279382-bppbp-bruno-putzeys-purist-balanced-preamp-balanced-volume-control.html
Title: Re: Bruno Putzey's Balanced Preamp
Post by: tony on Nov 07, 2017 at 06:41 AM
i will post this in our FB user group, there are at least ten board layout artists in our group who can do layouts...

the simplest solution to balanced in and balanced out stage is the use of interstage traffos from sowter, jensen or cinemag edcor or hammond...a 10k:10k traffo is good to use here...

i bet Edrel Sison can make such traffos too using the z11 cores...
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 07, 2017 at 01:18 PM
The gerber files of the PCB from diyaudio.com

http://www.diyaudio.com/forums/attachments/group-buys/534628d1456731699-bruno-putzeys-balanced-preamp-buy-2-a-micropregerbers-zip

Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 07, 2017 at 01:26 PM
And the bill of materials (BOM) also from diyaudio.com

http://www.diyaudio.com/forums/attachments/group-buys/531319d1455543791-bruno-putzeys-balanced-preamp-buy-hypex-preamp-bom-zip
Title: Re: Bruno Putzey's Balanced Preamp
Post by: tony on Nov 07, 2017 at 01:46 PM
The gerber files of the PCB from diyaudio.com

http://www.diyaudio.com/forums/attachments/group-buys/534628d1456731699-bruno-putzeys-balanced-preamp-buy-2-a-micropregerbers-zip



rochie, pwede pa quote kay Dandy?
Title: Re: Bruno Putzey's Balanced Preamp
Post by: rochie on Nov 07, 2017 at 01:58 PM
rochie, pwede pa quote kay Dandy?

sige ill check the size and layers, FR4 and 2oz copper?
Title: Re: Bruno Putzey's Balanced Preamp
Post by: rochie on Nov 07, 2017 at 02:14 PM
for boards that are not greater than 10cmX10cm nasa 1000 lang for 8pcs I think,shipping not included.
ilang boards ba ang kailangan? Dandy also offers board assembly with SMT components
Title: Re: Bruno Putzey's Balanced Preamp
Post by: tony on Nov 07, 2017 at 02:48 PM
sige ill check the size and layers, FR4 and 2oz copper?

1 oz is enough para mas mura, wala namang high currents na dadaloy...
black looks good...
FR4 of course...
Title: Re: Bruno Putzey's Balanced Preamp
Post by: tony on Nov 07, 2017 at 02:50 PM
for boards that are not greater than 10cmX10cm nasa 1000 lang for 8pcs I think,shipping not included.
ilang boards ba ang kailangan? Dandy also offers board assembly with SMT components

SMT seems to be a good idea...minimum qty... i guess...
as for shipping he can hand carry in one of his trips here.....:D
Title: Re: Bruno Putzey's Balanced Preamp
Post by: rochie on Nov 07, 2017 at 04:07 PM
SMT seems to be a good idea...minimum qty... i guess...
as for shipping he can hand carry in one of his trips here.....:D


sayang di na aabot,uuwi siya sa 17 at may event daw sila sa Baguio, inaaya nga ako kung meron ako project na pwede ko i display sa event niya. I Think walang min qty for PCB assembly with SMT parts,balik na daw ulit sila sa dati kasi free na ulit yung ibang mga kasama niya, so baka continue ulit mga diy kits na semi-assembled.

@romy - kung madami interest sa GB nito baka gusto nila na assembled na yung mga smt components para hindi na mahirap magbuo. may estimate ka na ba kung mga ilang pc kaya?
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 07, 2017 at 05:35 PM
Wow Sir Tony and rochie. Thank you for your interest to this project.

Yes, i would also be interested with pre-assembled SMT.

How many PCBs? I hope this thread would generate the interest and the estimated number. :D

1. romymartinez
2. ....
3. ....
...

:D
Title: Re: Bruno Putzey's Balanced Preamp
Post by: tony on Nov 07, 2017 at 05:41 PM
copy paste nyo na lang...

1. romymartinez
2. ....tony tecson 2 boards...
3. ....
Title: Re: Bruno Putzey's Balanced Preamp
Post by: rochie on Nov 07, 2017 at 05:41 PM
bro romy - sent you a PM
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 07, 2017 at 06:03 PM
1. romymartinez 1 bare board, 1 board with SMT
2. ....tony tecson 2 boards...
3. ....
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 07, 2017 at 09:08 PM
Picture of preamp beard assebled by a diyaduio.com member:

(https://lh3.googleusercontent.com/-H8FHlqi8kMM/V0B1UIqOPNI/AAAAAAAAByM/6XtZXAT_acYlbs0ivdMdXlmLgdsRgm3MACCo/s640/P1000799.JPG)
Title: Re: Bruno Putzey's Balanced Preamp
Post by: rochie on Nov 07, 2017 at 09:41 PM
9 boards confirmed for fabrication. ETA 2-3rd week of November

1. romymartinez 1 bare board, 1 board with SMT
2. ....tony tecson 2 boards...
3. ....rochie 1 board
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 07, 2017 at 09:48 PM
9 boards confirmed for fabrication. ETA 2-3rd week of November

GB for 9 boards:

1. romymartinez
2. romymartinez
3. tony
4. tony
5. rochie
6. ..
7. ..
8.. ..
9. ..

Four boards still available :D
Title: Re: Bruno Putzey's Balanced Preamp
Post by: parasound on Nov 08, 2017 at 01:05 AM
Count me in..  1 board with parts na ha.. thanks


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Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 08, 2017 at 07:07 AM
Count me in..  1 board with parts na ha.. thanks

Noted Sir parasound :D

GB for 9 boards:

1. romymartinez
2. romymartinez
3. tony
4. tony
5. rochie
6. parasound
7. ..
8.. ..
9. ..

3 boards still available :D

Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 08, 2017 at 07:23 AM
GB for 9 boards:

1. romymartinez
2. romymartinez
3. tony
4. tony
5. rochie
6. parasound
7. ..
8.. ..
9. ..

3 boards still available :D

Interested with SMD parts  and assembly GB
(arrangements for our further discussions)

1. romymartinez
2. rochie
3. parasound
4. ...

Title: Re: Bruno Putzey's Balanced Preamp
Post by: ndotcom on Nov 08, 2017 at 07:38 AM
How much kaya abutin neto with parts na?
Title: Re: Bruno Putzey's Balanced Preamp
Post by: rochie on Nov 08, 2017 at 08:26 AM
How much kaya abutin neto with parts na?
Guesstimate ko sa parts mga 3-4k,ang medyo mahal yung xlr connector kung reputable brand ang bibilhin. Try ko gumawa ng project sa mouser para makakuha ng quote. Yung torroid nito nasa 700 ang isa from mouser din.

Sent from my SM-J510GN using Tapatalk

Title: Re: Bruno Putzey's Balanced Preamp
Post by: tony on Nov 08, 2017 at 10:08 AM
rochie, i do not like torroids for these type of amps, an EI with primary screens is much better for noise...

and since the boards were designed for smt's it makes more sense to get them with the resistors soldered in....
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 08, 2017 at 11:17 AM
Guesstimate ko sa parts mga 3-4k,ang medyo mahal yung xlr connector kung reputable brand ang bibilhin. Try ko gumawa ng project sa mouser para makakuha ng quote. Yung torroid nito nasa 700 ang isa from mouser din.

Sent from my SM-J510GN using Tapatalk



I think Sir rochies guesstimate is about right. When I made an estimate of cost of parts for 1 pcb using RS Philippines and element14 Philippines it's around 4.1K excluding the trafo. With group buy malamang mas mura if we can have the numbers and  from Mouser. :D
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 08, 2017 at 11:20 AM
Perhaps also a GB for a nice professionally made case (with the necessary drillings, holes and cut outs, labelings) for this nice amp? :D
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 08, 2017 at 11:22 AM
How much kaya abutin neto with parts na?

Sali kana sa GB Sir. This preamp could pair nicely with your NCores. :D
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 08, 2017 at 11:33 AM
Bruno Putzey is the man behind Hypex Electronics (NCore amp modules, power supplies, regulators) and Mola-Mola high end audio electronics.

https://www.hypex.nl/

https://www.mola-mola.nl/

Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 08, 2017 at 11:42 AM
From Bruno Putzey's article:

Quote

"I have a double agenda in presenting this demonstration project. Firstly just to demonstrate how the "new" design methodology works in practice, but secondly to invite doubters to discover for themselves how a bit of rational engineering can produce staggeringly good sonics without resorting to boutique parts or boutique thinking. This is going to be the cheapest and best-sounding preamplifier you've ever built."


:D
Title: Re: Bruno Putzey's Balanced Preamp
Post by: romymartinez on Nov 08, 2017 at 11:50 AM
Sir tony and rochie will take care of all technical side of this GB. They are the technical experts. :D

I'm just a prospective end user and "tulak" pusher for this GB.  Ha ha :D

Sali na!
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 08, 2017 at 06:46 PM
sent the BOM for quotation for PCB assembly of the SMT parts,sana affordable kahit min qty lang para hindi na tayo mahirapang maghinang nung mga SMT.

ano pala yung 2 maliit na daughter board na nakakabit ng vertical?
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 08, 2017 at 11:05 PM
Sir rochie, those are Hypex HXR voltage regulators, drop in replacements for the LM7812/7912 voltage regulators. Supposed to be better but much much $$$ expensive. :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 08, 2017 at 11:07 PM
Sir rochie, can you kindly post/link the proposed BOM? Thanks!
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 09, 2017 at 10:30 AM
Sir rochie, can you kindly post/link the proposed BOM? Thanks!

sorry, di pa pala ako nakakagawa ng BOM sa mouser but what Ive sent to my friend is the downloadable bom from diyaudio so that he can count and check what package are used for the components. btw min order qty pala ng mga components is 250pc if we want the pcb assembly pero it cheaper kasi bulk baka if we can fill the 9 pcs and then 4.5K pesos for mouser bom baka kayanin na for pcb assembly and then may extra components pa tayo for future use.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 09, 2017 at 03:09 PM
Sir rochie,  mas OK ako na ipa assemble na natin. I hope the others will agree.

BTW yung BOM galing sa www.diyaudio.com ay naka Excel at dalawang sheet. Yung isa  ay "Original BOM" (BOM prepared by Hans Polak) and "Latest 15-02-2016" which is 'better and improved' based on results of earlier builds. I suggest that we use the "Latest"

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 09, 2017 at 03:16 PM
at least the smt resistors....that will ease our work of assembling it...
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: noob on Nov 10, 2017 at 02:01 PM
GB for 9 boards:

1. romymartinez
2. romymartinez
3. tony
4. tony
5. rochie
6. parasound
7. ..
8.. ..
9. ..

3 boards still available :D

Interested with SMD parts  and assembly GB
(arrangements for our further discussions)

1. romymartinez
2. rochie
3. parasound
4. ...

4. noob (please count me in, dito ba yung assembled na?)
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 10, 2017 at 02:05 PM
sagutin ko isang board para kay ndotcom aka norman...
so two boards na lang..
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 10, 2017 at 02:07 PM
GB for 9 boards:

1. romymartinez
2. romymartinez
3. tony
4. tony
5. rochie
6. parasound
7. ndotcom
8.. ..
9. ..

2  boards still available :D

Interested with SMD parts  and assembly GB
(arrangements for our further discussions)

1. romymartinez
2. rochie
3. parasound
4. noob

 
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: ndotcom on Nov 10, 2017 at 02:49 PM
maraming salamat sir Tony!
Esep ko kasi wala pa ako maikabit na source dito since mga CDP, TT at DAC ko ay puro RCA outs lang. Pero try ko revive ICE amps ko using this.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 10, 2017 at 03:34 PM
maraming salamat sir Tony!
Esep ko kasi wala pa ako maikabit na source dito since mga CDP, TT at DAC ko ay puro RCA outs lang. Pero try ko revive ICE amps ko using this.

ako halos kokonti langdin naman yung mga binuo ko na talagang nagagamit ko hehehehe, yung iba is for the sake na meron ka lang talaga mabutingting on your free time or gusto matutunan. halos yung ibang diy amp na nabuo ko na at natesting ko na gumana wala pa ding mga case/chassis haha kaya andun nasa kahon lang din hehehe, kumbaga it's the journey not the destination :D :D :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 10, 2017 at 04:49 PM
meron na akong tube preamp na merong true balanced outputs, single ended pa rin ang inputs, one of these days i will make a fully balanced tube line amp.....
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 10, 2017 at 04:50 PM
that is it rochie...most of the fun is in the travel, not the destination...

ako halos kokonti langdin naman yung mga binuo ko na talagang nagagamit ko hehehehe, yung iba is for the sake na meron ka lang talaga mabutingting on your free time or gusto matutunan. halos yung ibang diy amp na nabuo ko na at natesting ko na gumana wala pa ding mga case/chassis haha kaya andun nasa kahon lang din hehehe, kumbaga it's the journey not the destination :D :D :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 11, 2017 at 10:12 AM
Hi Sirs, just to remove any confusion, let's simplify the list.

Kindly indicate if its with or without assembled SMTs
My feeling is that we all would like to have those tiny tiny SMTs assembled for us :D

1. romymartinez - with assembled SMTs
2. romymartinez - with assembled SMTs
3. tony - with assembled SMTs (tama ba Sir?)
4. tony - with assembled SMTs (tama ba Sir?)
5. rochie - with assembled SMTs (tama ba Sir?)
6. parasound - with assembled SMTs
7. noob - with assembled SMTs
8. ndtcom s - with assembled SMTs (tama ba sir?)
9.. ..

1 board left! :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 11, 2017 at 11:23 AM
yes...
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 11, 2017 at 12:25 PM
GB for 9 boards with pre-assembled SMTs

1. romymartinez
2. romymartinez
3. tony
4. tony
5. rochie
6. parasound
7. noob
8.. ndtcom
9. ..

Only 1 board  left!
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 12, 2017 at 10:31 AM
Boards now fabricated. (https://uploads.tapatalk-cdn.com/20171112/747cd09d3d149ef9a98405cfe515e5c7.jpg)

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Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 12, 2017 at 10:52 AM
Wow bilis!
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 12, 2017 at 03:25 PM
(https://pdf2jpg.net/files/4114f63afecb85aae244e4f3c692f391b6e49ebd/BOM-page-001.jpg)
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 12, 2017 at 03:47 PM
Posted above is the BOM used in the diyaudio GB.

We will adopt the same BOM in our GB unless you have other suggestions.

Of course, we will not use Hypex regulators for u4/U5 but will use LM7812/LM7912 (TO-220) unless we decide otherwise

Regarding the last column "Quick Circuit Supply & Assemble" in the diyaudio BOM. "Yes" means that the SMTs are pre-assembled by their PCB maker (Quick Circuit), while "No" means that through hole components are not pre-assembled.

For our GB, we have already decided that all SMTs are pre-assembled ("Yes" in the last column of BOM). We will just wait for the cost estimate c/o rochie.

Now, we should also decide whether  all through hole components ("No" in the last column of BOM) should be pre-assembled as well. We will also wait for the cost estimate c/o rochie.

Let's vote: through hole components pre-assembled also?


1. romymartinez - Yes
2. romymartinez - Yes
3. tony - ??
4. tony - ??
5. rochie - ??
6. parasound - ??
7. noob - ??
8. ndtcom - ??
9. ...
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 12, 2017 at 03:56 PM
Posted above is the BOM used in the diyaudio GB.

We will adopt the same BOM in our GB unless you have other suggestions.

Of course, we will not use Hypex regulators for u4/U5 but will use LM7812/LM7912 (TO-220) unless we decide otherwise

Regarding the last column "Quick Circuit Supply & Assemble" in the diyaudio BOM. "Yes" means that the SMTs are pre-assembled by their PCB maker (Quick Circuit), while "No" means that through hole components are not pre-assembled.

For our GB, we have already decided that all SMTs are pre-assembled ("Yes" in the last column of BOM). We will just wait for the cost estimate c/o rochie.

Now, we should also decide whether  all through hole components ("No" in the last column of BOM) should be pre-assembled as well. We will also wait for the cost estimate c/o rochie.

Let's vote: through hole components pre-assembled also?


1. romymartinez - Yes
2. romymartinez - Yes
3. tony - ??
4. tony - ??
5. rochie - ??
6. parasound - ??
7. noob - ??
8. ndtcom - ??
9. ...

sa mga through hole ok lang na hindi na assembled para sa akin kasi madali naman yun ikabit compared to SMT
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 12, 2017 at 04:15 PM
Sir rochi
sa mga through hole ok lang na hindi na assembled para sa akin kasi madali naman yun ikabit compared to SMT

OK din lang sa akin if the others say so. :D

Would it imply kanya kanya tayong mag source out ng through hole components or GB pa din ng through hole parts pero kanaya kanya lang ang through hole parts assembly?
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 12, 2017 at 05:13 PM
Sir rochi
OK din lang sa akin if the others say so. :D

Would it imply kanya kanya tayong mag source out ng through hole components or GB pa din ng through hole parts pero kanaya kanya lang ang through hole parts assembly?
Bibigyan din niia daw ako quote sa through hole components kahit hindi nakakabit.kaya lang meron kasi yung min order qty na nasa hundreds hehehe baka masyado mahal

Sent from my SM-J510GN using Tapatalk

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 12, 2017 at 05:22 PM
OK Sir rochie, once we had all the cost information, then the group can decide. :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 13, 2017 at 07:19 AM
sa mga through hole ok lang na hindi na assembled para sa akin kasi madali naman yun ikabit compared to SMT

yes to this, i think will be best that we get these boards as they will cost cheaper than with smt's and turn around will be faster too...

i was about to ask someone from the other forum to redesign the board for thru hole...
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 13, 2017 at 05:36 PM
UPDATE: As per advise by our technical team rochie and tony, only SMTs will be pre-assembled to the PCB, not the through hole components. We will wait for the cost estimate c/o rochie. :D  :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 14, 2017 at 03:04 PM
estimate cost for the pcb assembly is 30usd/pc not including components.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 17, 2017 at 07:33 AM
estimate cost for the pcb assembly is 30usd/pc not including components.

Seems reasonable to me.

Any update on component cost?
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 17, 2017 at 07:48 AM
estimate cost for the pcb assembly is 30usd/pc not including components.

this is with smt resistors soldered in?
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 17, 2017 at 11:51 AM
this is with smt resistors soldered in?
Assembly charge lang sir Tony,additional cost for the smt components.

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Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 17, 2017 at 03:03 PM
@All - aabutin ng 21K for all the boards na assembled na with SMT components with extra parts,medyo mahal dahil sa 1% tolerance nung components and the min order qty na kailangan,pero for sure madami tayong spare na parts :D :D :D :D so need naman ng additional boards hahahahha.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 17, 2017 at 03:06 PM
sorry rochie, money is tight now, i will have to pass...
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 17, 2017 at 03:19 PM
sorry rochie, money is tight now, i will have to pass...

if boards lang kukuha ka pa din? fabricated na yung boards pero hindi ko pa pinapa ship papunta dito sa manila coz sabi ko antayin muna decision kung ipapaassemble na. 250pcs kasi min order qty per components eh kaya medyo malaki na yung presyo. pero kung susumahin parang mas mura pa din compare sa 4-4.5K na mouser/rs-components price per board.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 17, 2017 at 05:03 PM
how much kung board lang?
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 17, 2017 at 05:23 PM
how much kung board lang?


nasa 1200.00 yung 9 boards not including shipping.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 18, 2017 at 12:47 AM
Sir rochie,

1. Can you post the proposed BOM of  the assembler of SMTs (including brand and part number)? A listing similar in format sa diyaudio BOM.. I am interested how our BOM is similar or different from the diyaudio BOM.

2. Duon sa diyaudio BOM, all  resistors  have 0.1% tolerances (except for 2.2M ohm which is 1% tolerance). According to the diyaudio forum threads, critical is R1 to R8 which should have tolerances of 0.1 % and 10ppm . The rest of the resistors are less critical in terms of tolerance and 1% tolareance might be OK.

3. I am still committed to have my board pre-assembled. But I would like to see first the proposed BOM and how it compares to the diyaudio BOM. As much as possible I wish our BOM is very similar to the diyaudio BOM in terms of specs and tolerances. Their BOM is already well proven by 3 batches of group buys already. :D

Sir tony, I hope you will still get two bare PCBs :D

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 18, 2017 at 12:56 AM
Sir parasound, noob, ndtcom would you like us to proceed with the pre-assembled boards?
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 18, 2017 at 04:06 PM
Sir rochie,

1. Can you post the proposed BOM of  the assembler of SMTs (including brand and part number)? A listing similar in format sa diyaudio BOM.. I am interested how our BOM is similar or different from the diyaudio BOM.

2. Duon sa diyaudio BOM, all  resistors  have 0.1% tolerances (except for 2.2M ohm which is 1% tolerance). According to the diyaudio forum threads, critical is R1 to R8 which should have tolerances of 0.1 % and 10ppm . The rest of the resistors are less critical in terms of tolerance and 1% tolareance might be OK.

3. I am still committed to have my board pre-assembled. But I would like to see first the proposed BOM and how it compares to the diyaudio BOM. As much as possible I wish our BOM is very similar to the diyaudio BOM in terms of specs and tolerances. Their BOM is already well proven by 3 batches of group buys already. :D

Sir tony, I hope you will still get two bare PCBs :D



I gave the bom from the link that you've provided but only use 1% tolerance components since according to my friend 0.1% is kinda expensive
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: ndotcom on Nov 18, 2017 at 08:02 PM
Sir parasound, noob, ndtcom would you like us to proceed with the pre-assembled boards?

Sorry sir but I have to pass.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: parasound on Nov 19, 2017 at 09:32 AM
Sorry to say, pass din ako @ 21k, bayaran ko na lang yung board kung sakali.. pasensiya na sa istorbo.

Sir parasound, noob, ndtcom would you like us to proceed with the pre-assembled boards?



Sent from my iPhone using Tapatalk
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 19, 2017 at 02:49 PM
Sorry to say, pass din ako @ 21k, bayaran ko na lang yung board kung sakali.. pasensiya na sa istorbo.

Hi Sir parasound, thanks for the update. :D

Sent from my iPhone using Tapatalk
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 19, 2017 at 02:51 PM
Hi All,

It appears that we will just get the 9 bare boards.

Sir rochie, sohow much will it be including shipping?

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 20, 2017 at 04:56 PM
Hi All,

It appears that we will just get the 9 bare boards.

Sir rochie, sohow much will it be including shipping?



Ill get back at you for the shipping,busy pa friend ko because of the summit/conference he conducted sa Baguio,sayang kung alam ko lang di matutuloy pcb assembly pinabitbit ko na sana sa kanya mga pcb pag-uwi niya dito.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 20, 2017 at 10:16 PM
Ill get back at you for the shipping,busy pa friend ko because of the summit/conference he conducted sa Baguio,sayang kung alam ko lang di matutuloy pcb assembly pinabitbit ko na sana sa kanya mga pcb pag-uwi niya dito.

OK land yun Sir rochie. Share share nalang sa cost. :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 20, 2017 at 10:28 PM
Sorry sir but I have to pass.

Noted Sir, so share share nalang tayo sa cost nung nagawa nang boards. It will not cost that much. :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 21, 2017 at 11:29 AM
Noted Sir, so share share nalang tayo sa cost nung nagawa nang boards. It will not cost that much. :D

shipping charge is very minimal lang naman kasi konti lang yung boards, based on my experience wala pang 1KG yun, my friend can send it via LBC since he frequent Hongkong, so he can ship it from there as a "balikbayan" box
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 26, 2017 at 09:53 AM
Hi rochie, kelan kaya dating ng boards? :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 27, 2017 at 05:04 PM
Dear All,

As per PM sent to me by rochie, the total cost  for the fabrication and shipping from China to rochie of the 9 boards is P2,100. So that's P233.33 per board. :D

I will deposit P2,1000 to rochie's account to initially cover the cost. :D

Any suggestion on how to collect your payments and the pick-up/shipping arrangements once rochie got the boards? :D

Hi Sirs, just to remove any confusion, let's simplify the list.

1. romymartinez
2. romymartinez
3. tony
4. tony
5. rochie
6. parasound
7. noob
8. ndtcom

1 board left! :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 28, 2017 at 09:52 AM
Dear All,

As per PM sent to me by rochie, the total cost  for the fabrication and shipping from China to rochie of the 9 boards is P2,100. So that's P233.33 per board. :D

I will deposit P2,1000 to rochie's account to initially cover the cost. :D

Any suggestion on how to collect your payments and the pick-up/shipping arrangements once rochie got the boards? :D


pag nakuha ko na mga boards i can probably send it out via LBC/JRS to everybody, I think JRS is cheaper for NCR than LBC and they also deliver next day. you can just deposit the shipping charge to my bpi account.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 28, 2017 at 11:11 AM
rochie, please hold on to my three boards, i will get them eventually....please pm me your bpi account for three boards including shipping,
one board please ship to ndotcom and the other two to me...
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: noob on Nov 29, 2017 at 06:55 AM
Sir parasound, noob, ndtcom would you like us to proceed with the pre-assembled boards?
Good am, please pm me the account number so i can make payment for the board. thanks.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Nov 29, 2017 at 07:11 AM
rochie, if you can bring the boards to Dusit, i will pay in cash...

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Nov 29, 2017 at 07:45 AM
rochie, if you can bring the boards to Dusit, i will pay in cash...
Hindi ata aabot sa Sat yung board sir Tony.




Sent from my SM-J510GN using Tapatalk

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Nov 29, 2017 at 11:18 AM
HI All,

To clarify, the P233.34 per board covers the cost the board plus shipping from China to rochie's place.

It does not include the cost of shipping from rochie to your place. Pls contact rochie on this regard. :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 01, 2017 at 01:34 PM
Deposited to rochie's account the P2,100 "abono" payment for the manufacture of the boards and the shipping cost from China to rochie. :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Dec 04, 2017 at 10:34 AM
boards are on the way via UPS, ETA is within the week kung walang delay sa customs.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 04, 2017 at 03:57 PM
Wow! Need to order na the parts very soon! :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Dec 06, 2017 at 05:50 PM
Wow! Need to order na the parts very soon! :D

YGPM bro.

Update: Boards are now on-hand.bilis ng UPS :D :D :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 06, 2017 at 06:04 PM
Dear All,

As per suggestion ni rochie, he will ship the boards sa akin (I'm located in Nueva Ecija) and in turn will ship  them to you. Total cost per  board will be Php  233.34 plus shipping cost from rochie to me plus shipping cost from me to you. :D I will later let you know how much will  be the total cost per board.. :D

Unless somebody have better suggestions, we will do this  very soon. :D

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Dec 06, 2017 at 06:35 PM
@All - taga Nueva Ecija pala si Romy so its more economical kung ako na lang mag ship nung mga boards sa inyo since most of us dito lang sa manila,JRS is cheaper i think nasa 110 lang compared to LBC na nasa 155 pesos.pa PM na lang ako ng mga address nyo and ill give you my BPI account para doon nyo na lang i transfer yung payment, or kung malapit kayo sa Alabang or Pioneer mandaluyong pwede tayo mag meet or  I can grab express lite it para matanggap nyo agad.

@Romy - pa update na lang dito kung sino na yung nakabayad sayo so that I can arrange the shipping to them
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 07, 2017 at 10:11 AM
Dear All,

Total cost per board will be Php 233.34 + 110 = [Php 343.34.

Let's make it Php 340.00 per board  :D

I will PM you my account details. :D

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 18, 2017 at 03:13 PM
Dear All, Sorry for the non-update. I was out of circulation the whole week.

Kindly PM me when payment  is made so that I can inform rochie the go ahead to ship the  PCB to you.

Thanks!

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: noob on Dec 19, 2017 at 03:21 PM
Good pm, payment made sir.  copy of photo was sent to your private message.  cencia na for a little delay kasi working.  I did have a break during the Christmas party kaya nakapagdeposit.  Thanks and kindly acknowledge. 
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 21, 2017 at 03:02 PM
Good pm, payment made sir.  copy of photo was sent to your private message.  cencia na for a little delay kasi working.  I did have a break during the Christmas party kaya nakapagdeposit.  Thanks and kindly acknowledge. 

Payment received Sir noob. Sorry for the dealy in acknowledging the payment.

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 21, 2017 at 03:03 PM
I also acknowledge receiving payment from Sir tony.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Dec 21, 2017 at 03:04 PM
rochie, can you ship two boards to me and one board to ndoctcom? thanks

i will be giving away one of my boards to Albert Ocampo when he comes over...
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 21, 2017 at 03:07 PM
Sir rochie,

You may proceed with the shipping:
noob - 1 board
tony - 3 baords
romy - 4 boards (2 reserved for me, 1 for parasound and 1 remaining unreserved)

Sir nood and Sir tony, kindly directly contact Sir rochie for shipping arrangements.

Thanks!

Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 21, 2017 at 03:14 PM
rochie, can you ship two boards to me and one board to ndoctcom? thanks

i will be giving away one of my boards to Albert Ocampo when he comes over...

Sir rochie, kindly ship the bards as requested ni Sir tony
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 21, 2017 at 03:17 PM
Sir rochie,

Yung kay Sir noob, paki ship na rin sa akin as per PM si Sir noob. So all in all please ship 5 boards to me (2 reserved to me, 1 reserved to parasound, 1 reserved to noob and 1 unreserved)..

Thanks
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Dec 21, 2017 at 03:42 PM
got it Bros, sensiya na medyo natagalan bago ko i ship, daming lakad this time of the year hahahahaha.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Dec 21, 2017 at 04:57 PM
Sir rochie, yung sa akin no rush naman. Pag may time ka lang. :D

Enjoy the holidays :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Jan 03, 2018 at 11:30 AM
Sir rochie, Happy new year!

Any updates on the shipping of the PCBs?

Thanks!
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Jan 15, 2018 at 10:52 PM
Hi rochie,

Any updates on shipping the boards?

Romy
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Jan 17, 2018 at 11:11 AM
guys, sorry for the delayed shipment, I though I can send this out during the holiday but mas lalong naging hectic yung  sched ko up until last week pagbalik ko sa work. will be sending out the confirmed boards later this afternoon.
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Jan 18, 2018 at 03:00 PM
Sir rochie, I just received the 5 boards you sent. Thanks!

Romy
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Jan 19, 2018 at 07:08 AM
got my 3 boards yesterday afternoon...thank you Rochie....
ndotcom, you can pick up your board anytime...
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Jan 20, 2018 at 05:43 PM
your all welcome guys, huli man daw  buti na lang nakarating pa din :D :D :D :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: rochie on Feb 28, 2018 at 11:17 AM
na-assemble nyo na ba mga pcb nyo?
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: romymartinez on Mar 06, 2018 at 11:44 AM
Hopefully soon. :D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: noob on Jun 26, 2019 at 03:21 PM
 8)
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: wheelee on Jun 26, 2019 at 05:06 PM
In paba ang mag DIY ngayon?
I used to DIY a lot of amp back in the day, I still have some schematics & PCB layout (BTW if you need a layout guy  ;) )
We used to make Altec, Marantz, BGW.... laman lagi ng raon.

I miss those days  ;D
Title: Re: Bruno Putzey's DIY Balanced Preamp Group Buy
Post by: tony on Jun 27, 2019 at 05:23 AM
the diy scene is alive and kicking well, what with numerous fb groups that encompassed the whole luzon visayas and mindanao....masaya talaga sa facebook, i can not even be in all of them, simply no time, i get news feeds from time to time...local diy'ers are now using boards made in china out of board layout design made by local talents.....exciting times this is......