Author Topic: Surplus amps (Read 991107 times)

ATJr. · « **Reply #2640 on:** Feb 16, 2009 at 03:55 PM »

Quote

Was just passing by looking for cd/dvd and went in this store at basement.

mind naming the store in which basement?

treasure are to be found in unexpected places indeed! congrats..

dana · « **Reply #2641 on:** Feb 17, 2009 at 09:29 AM »

For that price & condition, panalo talaga.
You must have been a good boy lately, Sir Southpeak.
Congrats again

Burjer , berjer, burjer!

Nelson O · « **Reply #2642 on:** Feb 18, 2009 at 11:12 PM »

One of my audio buddy got this solidstate monoblocks,
it's the Kenwood L-07ii.
Makes mini monitors sound big!
What a catch! Congratulations buddy!

Brian_mico · « **Reply #2643 on:** Feb 19, 2009 at 03:44 AM »

@ southpeak, you're really blessed .... iba talga pag mabait ka..

Superman · « **Reply #2644 on:** Feb 19, 2009 at 08:38 AM »

Congratulations, Ben!

strummsteel · « **Reply #2645 on:** Apr 22, 2009 at 03:13 PM »

Mga Sirs,

Newbie po at super willing to learn sa mga masters dito.

May nabili po ako last week na Yamaha AV Receiver.

DSP-AX520 @ Php6,000

Im sure napamahal ako, hehehehe

No remote po, so most likely, I will have to search for a universal remote.

Any ideas po kung anung brand? I see a lot of CDR-King remotes na universal pwede na kaya?

Also, plano ko po sumali sa mga masters dito na mahilig mag scour ng vintage amps at preamps.

Sana po you could post a link of must buy items and models para in case makita ko i can post here if its available so that di tayo mawalan ng info.

Salamat po

simonzaide · « **Reply #2646 on:** Apr 22, 2009 at 03:57 PM »

Quote from: strummsteel on Apr 22, 2009 at 03:13 PM

Mga Sirs,

Newbie po at super willing to learn sa mga masters dito.

May nabili po ako last week na Yamaha AV Receiver.

DSP-AX520 @ Php6,000

Im sure napamahal ako, hehehehe

No remote po, so most likely, I will have to search for a universal remote.

Any ideas po kung anung brand? I see a lot of CDR-King remotes na universal pwede na kaya?

Also, plano ko po sumali sa mga masters dito na mahilig mag scour ng vintage amps at preamps.

Sana po you could post a link of must buy items and models para in case makita ko i can post here if its available so that di tayo mawalan ng info.

Salamat po

you can try hifido and vintage knob to check out which vintage amps are valuable there are several websites naman for you to check the value of an amp

for the remote control you can try out the cdr king remotes basta compatible (its worth a try for P120 you cant go wrong) however malamang limited lang ang controls na magagamit mo like volume etc...

southpeak · « **Reply #2647 on:** Apr 22, 2009 at 06:31 PM »

Quote from: strummsteel on Apr 22, 2009 at 03:13 PM

Sana po you could post a link of must buy items and models para in case makita ko i can post here if its available so that di tayo mawalan ng info.

welcome to surplus amp forum strummsteel.. you may start your search from these sites. and good luck

btw, san ba hunting ground mo, pa PM naman

http://www.niji.or.jp/home/k-nisi/index.html
http://audio-database.com/
http://www.thevintageknob.org/index.html

simonzaide · « **Reply #2648 on:** Apr 22, 2009 at 06:45 PM »

Quote from: southpeak on Apr 22, 2009 at 06:31 PM

btw, san ba hunting ground mo, pa PM naman

hahahaha talagang may code of secrecy pa tlga hehehe

strummsteel · « **Reply #2649 on:** Apr 22, 2009 at 11:30 PM »

Im sure alam nyo na ung mga lugar na iniikutan ko.

Pier
MCS basement
Evangelista thrift shops

Baka may alam pa kayo, paki post nman.

Super bobo ako sa audio kasi, how does the power amp, pre-amp setups?

strummsteel · « **Reply #2650 on:** Apr 23, 2009 at 08:38 AM »

mga masters, isang newbie question nman po.

Yung surplus AV receiver na nabili ko po eh japanese system, which means konti lng ang masasagap na radio stations ng tuner.

Is there a chance I can convert this to our radio system here? Kung pwede po can you point me to which shop so that i could bring this asap.

Salamat in advance master.

simonzaide · « **Reply #2651 on:** Apr 23, 2009 at 09:54 AM »

Quote from: strummsteel on Apr 22, 2009 at 11:30 PM

how does the power amp, pre-amp setups?

pre amp is the one that processes the music and power amp is the one that powers your speaker (simplest explanation

)

strummsteel · « **Reply #2652 on:** Apr 23, 2009 at 12:12 PM »

Hmmm, pero pano ko ikakabit ung power amp? Pwede ko ba ikabit sa av receiver un? Pano? Hehehe sorry bobits ako, or para sa music setup lang un.

Tnx masters

simonzaide · « **Reply #2653 on:** Apr 23, 2009 at 01:11 PM »

Quote from: strummsteel on Apr 23, 2009 at 12:12 PM

Hmmm, pero pano ko ikakabit ung power amp? Pwede ko ba ikabit sa av receiver un? Pano? Hehehe sorry bobits ako, or para sa music setup lang un.

Tnx masters

usually a preamp would have output plugs (rca left and right labelled as out). you connect this to the power amps input. If kakabit mo sa AV reciever dapat may preout yung av reciever mo to be able to do this. note there might be some compatibility issues considering ur av reciever is 5.1 channel while your power amp is 2 channel lang so technically 2 channel lang mapopower ng power amp mo

ProtegeManiac · « **Reply #2654 on:** Apr 23, 2009 at 02:55 PM »

Anyone here knows the owner of the Denon PMA-1000 left in one of hte shops in MCS? Already forgot which one as I hurried out after listening to it for about 15mins, had to pick up my gf at the SolGen's. There were scratches on the top plate and a chip on the back of the left wood panel, I was hoping I could negotiate for a lower price. Thing is they already lost track of the owner, and it's been sitting in there for around 2 years.

Was hoping to get it for 5k so I could have the scratches painted over and wood panels replaced. good old Class A power, would have grabbed it already if it was in better aesthetic condition, although the front panel's nearly faultless.

Othan · « **Reply #2655 on:** Jun 15, 2009 at 11:14 PM »

good day

i just want to ask kung ayos lang ba bumili sa raon ng amplifiers na binebenta duon? napadaan lang ako last weekend doon, wanted to use it for 5.1 ht, ung sana meron dts and thx.

TIA

soundmind · « **Reply #2656 on:** Jun 17, 2009 at 06:44 PM »

Sirs, is it okey to plug a 100 volt compact disc player to a 110 volts transformer? how will it affect such player? thank you in advance.

southpeak · « **Reply #2657 on:** Jun 18, 2009 at 07:30 AM »

Quote from: soundmind on Jun 17, 2009 at 06:44 PM

Sirs, is it okey to plug a 100 volt compact disc player to a 110 volts transformer? how will it affect such player? thank you in advance.

this might help.. happy listening

http://www.pinoydvd.com/index.php?topic=75258.0

Lord Foo · « **Reply #2658 on:** Jul 03, 2009 at 12:55 PM »

Quote from: soundmind on Jun 17, 2009 at 06:44 PM

Sirs, is it okey to plug a 100 volt compact disc player to a 110 volts transformer? how will it affect such player? thank you in advance.

NO!!! In my experience no sir.

Get a 100 v transformer for 100v jap units. In the long run your 100v units will get busted if powered from a 110 stepdown transformer. Not immediately; but in time.

However, my sansui amplifier when i used a 110v transforme goes into protect mode when it gets strong bass signals from the CD Player. The protect pilot lamp indicator starts blinking. All audio cuts off. Then after a while the lights stops blinking again and the amp goes live again. Then it drops off again when bass signal is received.

I shifted to a 100v stepdown i got from the Pier. (please get the larger units not the smaller units. they cost a bit more though) and the amp never had problems again.

I presume that that will be the same problem with a 100 v CD player plugged into a 110 v transformer.

i hope this helps
foo

Lord Foo · « **Reply #2659 on:** Jul 03, 2009 at 01:10 PM »

Quote from: Othan on Jun 15, 2009 at 11:14 PM

good day

i just want to ask kung ayos lang ba bumili sa raon ng amplifiers na binebenta duon? napadaan lang ako last weekend doon, wanted to use it for 5.1 ht, ung sana meron dts and thx.

TIA

Medyo general ung question sir. You need to mention brands and models here. I myself have not purchased any raon amp being partial to either vintage amps or the newer home theatre amps.

Can I assume that you are referring to the New China HT amps in raon?

HMMMM. this is out of topic pala noh? Still

However my brother have been buying amps in raon and have done some research on them. He says there are so so china amps and there are a few great new china amps also.

To illustrate, one of the first 5.1 amp he bought as a newbie did not make him happy after a while. He opened it up and lo and behold... the rear or surround speakers were connected directly to the source for the front speakers...andaya...grabe. What a horrendous gimmick!!!! This will probably scare you off but it is gruesomely true.

After that...my brother did some searches in this forum, sent some email inquiries and was adviced by some guru about the good models...(i forgot which).. The model even had option for upgrading to double the output and kaya pa rin ng power source... i will txt him re the model and brand and post later. I remember it has cooling fans and the top has a transparent cover. He now has two of them. Bought upgraded with some parts he also bought from Raon. He uses one them to power some Vintage JUBAL JBL speakers ins office and a 5.1 set up at home.

In short sir...you need to know what brand/models are the best over there. Maybe some of the gurus here can pipe in and identify those yummy ones...

ATJr. · « **Reply #2660 on:** Jul 03, 2009 at 01:52 PM »

Quote

is it okey to plug a 100 volt compact disc player to a 110 volts transformer? how will it affect such player? thank you in advance.

in some cases you can get away with it, i did.....but why take the risk?

cd players use very small transformers, and at times there is plenty of space inside so that you can just get a 110/220 small traffo and use it as an auto-trafo......or....

you can have that traffo converted to 220 volt primary...wouldn't cost you much...and the conversion can be done in raon, "while you wait".....there are lots of transformer rewinders along the streets of raon.....

sandawa · « **Reply #2661 on:** Jul 03, 2009 at 06:21 PM »

Quote from: TonyT on Jul 03, 2009 at 01:52 PM

in some cases you can get away with it, i did.....but why take the risk?

cd players use very small transformers, and at times there is plenty of space inside so that you can just get a 110/220 small traffo and use it as an auto-trafo......or....

you can have that traffo converted to 220 volt primary...wouldn't cost you much...and the conversion can be done in raon, "while you wait".....there are lots of transformer rewinders along the streets of raon.....

Medyo OT tayo since this is a surplus amp thread but I have actually asked a technician to change the transformer of my Victor CDP from 100V to 220V and I was surprised it took him only less than an hour to do it. What he did was buy a transformer with various voltage taps as replacement to the original one.

There's a minor problem though. After, say, two hours and you go close to the CDP, you'll hear a slight hum coming from the transformer. It's not heard on the music/speaker though. I could live with this minor fault since there's no hum after an hour even if I get my ears close to the CDP's cover. I'm using my converted CDP for over a year now.

LordFoo,

Good to hear from you again. We miss you in a thread opened by Southpeak on vintage hifi. I didn't realize there are so many of us here who are into collecting surplus amps.

ATJr. · « **Reply #2662 on:** Jul 03, 2009 at 08:42 PM »

Quote

Medyo OT tayo since this is a surplus amp thread but I have actually asked a technician to change the transformer of my Victor CDP from 100V to 220V and I was surprised it took him only less than an hour to do it. What he did was buy a transformer with various voltage taps as replacement to the original one.

sorry for the OT but i believe many can benefit from this tip.....for small japanese units, conversion to full 220v is really very easy and inexpensive thing to do.....

sandawa · « **Reply #2663 on:** Jul 03, 2009 at 10:08 PM »

Yes, I was only charged P350 for everything. I was told the transformer used costs only P250. I checked out how it was done and realized it was really simple since even the 100V transformer's taps have labels which could be the basis in connecting the wires when the 220V transformer is installed.

If only the technician used a more expensive transformer, maybe the hum would not occur when it gets hot.

markcrenz · « **Reply #2664 on:** Jul 04, 2009 at 02:30 PM »

Quote from: sandawa on Jul 03, 2009 at 10:08 PM

Yes, I was only charged P350 for everything. I was told the transformer used costs only P250. I checked out how it was done and realized it was really simple since even the 100V transformer's taps have labels which could be the basis in connecting the wires when the 220V transformer is installed.

If only the technician used a more expensive transformer, maybe the hum would not occur when it gets hot.

word of caution to those who have their transformers converted: make sure the replacement transformers produce the same secondary voltage and current as the originals. some unscrupulous techs replace only with the nearest value, say 9 or 12 volts for a 10 volt secondary. that would be synonymous to using a 90 or 120 volt supply to your 100 volt equipment.

oweidah · « **Reply #2665 on:** Jul 04, 2009 at 04:09 PM »

Quote from: soundmind on Jun 17, 2009 at 06:44 PM

Sirs, is it okey to plug a 100 volt compact disc player to a 110 volts transformer? how will it affect such player? thank you in advance.

i plug my victor k2 xlz621 cdp to stac avr 110v since i bought it 2007?. still ok pa naman.
same with sansui au-9500 amp.

to be on the safe side use 100v transformer. baka lucky me lang

sandawa · « **Reply #2666 on:** Jul 04, 2009 at 05:18 PM »

Quote from: markcrenz on Jul 04, 2009 at 02:30 PM

word of caution to those who have their transformers converted: make sure the replacement transformers produce the same secondary voltage and current as the originals. some unscrupulous techs replace only with the nearest value, say 9 or 12 volts for a 10 volt secondary. that would be synonymous to using a 90 or 120 volt supply to your 100 volt equipment.

Oops, this gets me a bit confused. I'm not a technician, just a hifi enthusiast willing to learn from those properly trained in this field. I don't understand why the output on 100v transformer becomes relevant again after conversion.

What if I do this:

1. Remove the old 100v transformer and put voltage labels -- say, 6v, 9v and 12v -- on the wires cut using the transformer tap values as basis.

2. I plug in the replacement 220v transformer (same same size and wattage) and test if the corresponding taps -- 6v, 9v, 12v -- produce accurate values. I'd probably do it immediately after plugging and after 2 hours to see and hear if the voltages vary or the transformer hums when it gets hot.

3. If I get the desired results, I install the new 220v transformer in my equipment.

My question is, would there be a problem with that?

It's that simple to me but I could be wrong. BTW, this is not OT since this could apply to smaller surplus 100v amps where conversion cost could be practical.

ATJr. · « **Reply #2667 on:** Jul 05, 2009 at 08:59 AM »

Quote

My question is, would there be a problem with that?

your plan is sound......go for it...

the object of voltage conversion is to get rid of that 100 volt primary coil and be able to just plug into the wall....

i have done lots of voltage conversions in the past....

there are many ways of doing it and what step to take depends on a case by case basis...

1. if there is room inside the unit itself, merely adding a small transformer with 220/110 volt primary and using just the primary as an auto transformer feeding the 100volt original transformer from the 110volt tap is enough.....now do not worry much if that is a 110volt tap feeding a 100 volt primary.....there is enough impedance to limit current so that the 10 volt difference amounts to nothing.

2. there are cases wherein the transformer is designed so that the primary coil and secondary coils are built as separate(independent of each other) units on the transformer core such that you can dismantle the coils (and not disturb the secondary coils,) and just work on the primary coils to convert to 220.....i have done a lot of this, this is the best conversion if you ask me.....though requires more work....

Quote

word of caution to those who have their transformers converted: make sure the replacement transformers produce the same secondary voltage and current as the originals. some unscrupulous techs replace only with the nearest value, say 9 or 12 volts for a 10 volt secondary. that would be synonymous to using a 90 or 120 volt supply to your 100 volt equipment.

i wouldn't worry much about this, designers of equipment realize that the real world out there is not perfect....equipment designed for a nominal voltage of 100volts say are expected to operate with lines of 90 to 110 volts.....

aHobbit · « **Reply #2668 on:** Jul 08, 2009 at 11:57 AM »

Quote from: markcrenz on Jul 04, 2009 at 02:30 PM

word of caution to those who have their transformers converted: make sure the replacement transformers produce the same secondary voltage and current as the originals. some unscrupulous techs replace only with the nearest value, say 9 or 12 volts for a 10 volt secondary. that would be synonymous to using a 90 or 120 volt supply to your 100 volt equipment.

... a non-issue in conversion ... provided of course, its not in the magnitude of probably 20% or more! But still will not guarantee exactly 10V with your gear if plugged in your wall outlet.

Quote from: 0weidah on Jul 04, 2009 at 04:09 PM

...
to be on the safe side use 100v transformer. baka lucky me lang
...

... could be false security ...

Quote from: TonyT on Jul 05, 2009 at 08:59 AM

…
i wouldn't worry much about this, designers of equipment realize that the real world out there is not perfect....equipment designed for a nominal voltage of 100volts say are expected to operate with lines of 90 to 110 volts.
....

The truth is that you are lucky enough if you can get 220Vac right at your wall outlet ... and if you are using 220-110 transformer, it might be possible that you will just end up with the desired 100V!

If you are nearby a utility transformer, chances are, you are getting a generous supply as much as 240V.... and that even if you use a 220V-100Vac in this situation will still push the 110V to your equipment. That 100Vac rating on your transformer will be reduced to just letters!

If you are really paranoid to have your equipment suck 100V, then use decent AVR that has 100V output - the servo-control one works great .

Typical operations of an electrical gear is +/- 10% of plate voltage

oweidah · « **Reply #2669 on:** Jul 09, 2009 at 08:36 AM »

Quote from: aHobbit on Jul 08, 2009 at 11:57 AM

... a non-issue in conversion ... provided of course, its not in the magnitude of probably 20% or more! But still will not guarantee exactly 10V with your gear if plugged in your wall outlet.

... could be false security ...

The truth is that you are lucky enough if you can get 220Vac right at your wall outlet ... and if you are using 220-110 transformer, it might be possible that you will just end up with the desired 100V!

If you are nearby a utility transformer, chances are, you are getting a generous supply as much as 240V.... and that even if you use a 220V-100Vac in this situation will still push the 110V to your equipment. That 100Vac rating on your transformer will be reduced to just letters!

If you are really paranoid to have your equipment suck 100V, then use decent AVR that has 100V output - the servo-control one works great .

Typical operations of an electrical gear is +/- 10% of plate voltage

so, sir ahobbit; for an ordinary user with no technical or engineering background, no tools and gadgets; may i ask whats the best to use with japanese surplus gears?

for quite some time, ive been using stac avr with my jap. surplus gears and had no problems.

tnx