Topic: Biasing Dynaco MK3 & which KT88 brand best fits for a hi-fi application?

[s2kov]

Hi Tube Pro,

I used vishay metal oxide resistor for my power supply and this is how it looks like:

[ATJr.]

Sir TonyT,

I bought some 330 ohms 5watts resistors last monday and what I've got were different from what I was expecting like a rectangular cement type wirewound. these are cylindrical-axial type which I think a carbon composition resistor. Are they?
See pictures below:
(I've included some 1-watt resistors and a chip amp IC so you can visualize its real size)

yes they look like philips type carbon comps, but break open one to make sure.....the white ceramic encased 5 watters are wirewound types...

[Tube Pro]

Hi Tube Pro,

I used vishay metal oxide resistor for my power supply and this is how it looks like:

Hi sir s2kov,

Thanks for the info and illustration.
But if I got that small one, like 1/2w or 1w metal oxide, I will still be confused if it's a metal oxide or a metal film type.  

[Tube Pro]

yes they look like philips type carbon comps, but break open one to make sure.....the white ceramic encased 5 watters are wirewound types...

Yes sir TonyT,

I was expecting for that wirewound 5-watter white ceramic thing, but they gave me this cylindrical which I think a 5-watt carbon composition resistor. I'm not used to this 5-watt cylindrical shape, anyway thanks for the add'l info.  

[ATJr.]

hi joel,
i am not aware of 5 watter carbon comps, the biggest i'v seen so far are 2 watters as far as carbon comps are concerned....any higher than that and they come as wire-wounds...

interesado ako sa panel meter mo, can you email me specs at saka how much, i am contemplating on setting up bech psu's...thanks...

[Tube Pro]

hi joel,
i am not aware of 5 watter carbon comps, the biggest i'v seen so far are 2 watters as far as carbon comps are concerned....any higher than that and they come as wire-wounds...

interesado ako sa panel meter mo, can you email me specs at saka how much, i am contemplating on setting up bech psu's...thanks...

Hi master TonyT,

same with me. I got interested with this digital panel meter when I saw a video from YouTube showing this to monitor his output tube cathode voltage anytime, so he will know when to adjust for the exact bias voltage.
I bought these, actually, for the same purpose and put them on front panel, but just then realized na mejo awkward for the tube amp, which is supposed to have a vintage look, to have this modern digital figures on its face plates.
It comes in different voltage and current ranges:
200mv, 2v, 20v, 200v, 500v, 20mA, 200mA, 2A
mine are the 20v range type in 4-digit display.

They also have the 5-digit display with some RMB's price difference, but they are really cheap.
I'll e-mail the price later...
 

[Tube Pro]

hi joel,
i am not aware of 5 watter carbon comps, the biggest i'v seen so far are 2 watters as far as carbon comps are concerned....any higher than that and they come as wire-wounds...

interesado ako sa panel meter mo, can you email me specs at saka how much, i am contemplating on setting up bech psu's...thanks...

Hi sir TonyT,

send you e-mail, re prices of these 4-digit and 5-digit digital panel meter.
 

[Tube Pro]

Hi sir TonyT,

We're planning to buy some electronic parts in Pun Yu or Shenshen China on the first week of Nov.
Please send me the values and other devices you want me to purchase for you, before November.
 

[edrel sison]

Hi sir TonyT,

We're planning to buy some electronic parts in Pun Yu or Shenshen China on the first week of Nov.
Please send me the values and other devices you want me to purchase for you, before November.
 

hi joel, let me know which place you go to in shenshen, i will be there in december. my chinese friends dont know of any place to buy electronic components there.

i am looking for transformer covers, probably you can point me where can i buy them.

best regards,

edrel

[Tube Pro]

hi joel, let me know which place you go to in shenshen, i will be there in december. my chinese friends dont know of any place to buy electronic components there.

i am looking for transformer covers, probably you can point me where can i buy them.

best regards,

edrel

Sure sir Edrel, I'll give you the name of that building, (all-electronics stuff), computer parts and the next building having all mobile phones stuff.
It's more effective to have it printed and show to the taxi driver if you got lost finding the location.
It is the SEG Electronics Market.

[Tube Pro]

Here's the building with its chinese name you need to print out and show to the taxi driver.

[Tube Pro]

The SEG innards:











Good luck sir, and enjoy your future shopping.

[ATJr.]

@joel,

pass muna ko this time..... pipilitin kong makabuo ng isang project this coming holiday season...thank you very much....

[JojoD818]

that is what a "Toy Kingdom" looks like for people like us!

[Tube Pro]

@joel,

pass muna ko this time..... pipilitin kong makabuo ng isang project this coming holiday season...thank you very much....

Sir TonyT,

okay po. No problem, anytime I can do that favor for you guys (PDVD guys/gurus)  
I owe you a lot from what I've learned about this tube stuff.
Big tango to you also MasterJ, sir Edrel, s2kov,.... and ALL the experts down there
 

[Tube Pro]

that is what a "Toy Kingdom" looks like for people like us!

MasterJ,
   really, natawa ako sa quote mo: Toy Kingdom for people like us!
exactly po. You know the first time we went to that place, way back 2008, pagpasok pa lang ng building, para akong naengkanto, natulala ako (honestly). palibhasa, sa Raon lang ako nasanay, at malaki na sa akin ung Deeco, tiangge pa lang pala un sa China. hahaha...
Later d ko na rin alam if I would go to the left or right side, sa ground or the upper floors. ALthough, ibang kasama ko hindi ganun ang interest sa electronics, nagyaya ng umuwi, at d ko pa naikot ung ibang outlets! Para talaga akong batang hinihila ng mama ko palabas ng Jolibee.  

Baka po may hard to find na electronic parts jan na gusto nyong ipahanap sa akin doon, kung d naman masyadong nagmamadali, pauwi din ako ng December, 2nd or 3rd week, pwede ko ng dalhin.
 

[JojoD818]

MasterJ,
   really, natawa ako sa quote mo: Toy Kingdom for people like us!
exactly po. You know the first time we went to that place, way back 2008, pagpasok pa lang ng building, para akong naengkanto, natulala ako (honestly). palibhasa, sa Raon lang ako nasanay, at malaki na sa akin ung Deeco, tiangge pa lang pala un sa China. hahaha...
Later d ko na rin alam if I would go to the left or right side, sa ground or the upper floors. ALthough, ibang kasama ko hindi ganun ang interest sa electronics, nagyaya ng umuwi, at d ko pa naikot ung ibang outlets! Para talaga akong batang hinihila ng mama ko palabas ng Jolibee.  

Baka po may hard to find na electronic parts jan na gusto nyong ipahanap sa akin doon, kung d naman masyadong nagmamadali, pauwi din ako ng December, 2nd or 3rd week, pwede ko ng dalhin.
 

Naku brader. the gears and stuff we can build from those array of parts can only be limited by our imagination. 

If I were to visit there I would book a reservation on the nearest hotel and be there from opening 'til closing time. 

Thanks for the kind offer bro, I've been itching to learn PIC programming and machine language for some time now but haven't decided yet on which trainer tool to start with. I just hope I ain't too old for this... 

[edrel sison]

joel thank you very much. my eyes lit like a child on his first visit to a toy store. tama si jojo, toy kingdom!

i will see to it that i will have one full day to look and buy things here.

if you are able to see some transformer covers there let me know..

by the way does china issues visa at the border nowadays? magkano na kaya...thanks again joel!

[s2kov]

DIY haven!

that is what a "Toy Kingdom" looks like for people like us!

[Tube Pro]

DIY haven!

exactly.. 

[Tube Pro]

joel thank you very much. my eyes lit like a child on his first visit to a toy store. tama si jojo, toy kingdom!

i will see to it that i will have one full day to look and buy things here.

if you are able to see some transformer covers there let me know..

by the way does china issues visa at the border nowadays? magkano na kaya...thanks again joel!

hi Sir Edrel,

I heard they are issuing now that single entry visa at the border. They say its MOP 160 (Macau Patacas)

[edrel sison]

I heard they are issuing now that single entry visa at the border. They say its MOP 160 (Macau Patacas)

magkano ba yang patakas na yan joel

[Tube Pro]

magkano ba yang patakas na yan joel

Sir Edrel,

1 peso is equivalent to 6 patacas:

Php 1.00 = MOP 6.011 (as of this time / Nov. 3)
 

[JojoD818]

magkano ba yang patakas na yan joel

parang iba naisip ko diya kapatid... 

[edrel sison]

parang iba naisip ko diya kapatid... 

masarap "tumakas" sa macau!

[Tube Pro]

masarap "tumakas" sa macau!

Hi sir Edrel,

Hindi pa kami nakatakas ng Macau  kc last week lang nagrenew ng BlueCard.
If not this month, baka sa January na kami punta ng Shenzhen, kuha muna ng multiple entry China visa.
kaya hindi ko pa nakita kung saan may mga transformer cover.
Kayo po, nakapunta na ba kayo?
By the way, ung order kong Output Transformer, 1st week of January ko po kunin. Sa Molino Bacoor Cavite lang ako, Camella Springville.
Flight ko on Dec 26 na...  yehey...
See you sir...
 

[edrel sison]

Hi Joel,

Have not visited this thread for a while..so you are coming home.

Pay me a visit. I am just a good 45 mins away from your place.

tumunog na ba yung amp mo?

[Tube Pro]

Hi Joel,

Have not visited this thread for a while..so you are coming home.

Pay me a visit. I am just a good 45 mins away from your place.

tumunog na ba yung amp mo?

Hi Sir Edrel,
hindi pa sir kumpleto parts nitong MK3, ung OPT na order ko sa 'yo, un ang gagamitin ko.
I have the PT and Choke coils already. So while waiting, I made myself busy with the tiny chips, the Gainclones 
at the same time, I started working on my DIY MOSFET amp using 2SK1058 and 2SJ162, so I bought some parts in CatTai Shuhai last Sunday.
Baka by January or Feb na kami tutuloy ng Shenzhen.
ito pa lang ung update:

Circuit design laser printed on a transparency sheet


Checking kung tapat mga pins ng MOSFETs. (not the actual heatsink na gagamitin ko, mejo maliit ito)


Filter caps 100v WV for +/-77v supply


See you sir jan sa pinas.
Paki PM nalang po ung contact numbers nyo.
 

[edrel sison]

joel are you here already?

[edrel sison]

Hi Joel can you post some pictures of the OPT?

I forgot to take photos..