Author Topic: what is this old amplifier?  (Read 912 times)

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Offline ELS122Topic starter

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what is this old amplifier?
« on: October 14, 2019, 06:30:37 pm »
so I found this listing for a 1000w amplifier, is this like a usable amplifier because it's listed for 50eur and I was wondering if it would be usable for computer speakers  :-+ \
the brand is labeled as 'Tesla J' the title says that it was a used 'Czechoslovak Product Broadcast Amplifier.
and also the seller can't verify that it's working.
here is the listing because I couldn't attach all the images from the listing!
https://www.ss.com/msg/lv/electronics/audio-video-dvd-sat/audio/amplifiers/bkeig.html
 

Offline calexanian

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Re: what is this old amplifier?
« Reply #1 on: October 14, 2019, 06:36:22 pm »
Tesla (Or Teslovak) was the preseason to the current JJ tube company. They produced many electronic and appliance goods. Kind of the GE or RCA of the area. No telling what that might have been used for! Probably some kind of industrial or commercial use.
Charles Alexanian
Alex-Tronix Control Systems
 

Offline 001

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Re: what is this old amplifier?
« Reply #2 on: October 14, 2019, 06:36:29 pm »
so I found this listing for a 1000w amplifier, is this like a usable amplifier because it's listed for 50eur and I was wondering if it would be usable for computer speakers  :-+ \
the brand is labeled as 'Tesla J' the title says that it was a used 'Czechoslovak Product Broadcast Amplifier.
and also the seller can't verify that it's working.
here is the listing because I couldn't attach all the images from the listing!
https://www.ss.com/msg/lv/electronics/audio-video-dvd-sat/audio/amplifiers/bkeig.html

Looks like bitkoin maining station  :-DD
 

Offline madires

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Re: what is this old amplifier?
« Reply #3 on: October 14, 2019, 06:47:45 pm »
Maybe a 100V PA amp?
 

Online Gyro

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Re: what is this old amplifier?
« Reply #4 on: October 14, 2019, 06:48:56 pm »
It looks like some kind of multi channel (or at least paralleled) noisy fan cooled public address amplifier with awkward connectors and difficult repairability. It looks very risky.

For your 50eur, you would be much safer finding a working consumer stereo amplifier from ebay or local sale sites to drive your PC speakers. You might even find a modest new one for that price.
Best Regards, Chris
 

Offline jaromir

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Re: what is this old amplifier?
« Reply #5 on: October 14, 2019, 07:15:13 pm »
This is old Tesla amplifier, probably 40 years old, and has nothing to do with JJ, which was born on Tesla ashes after political changes in 1989. Funny coincidence some of audio gear were made within a stone's throw from where I'm typing this right now.

I'm not sure about the particular piece - it looks familiar, but I can't recognize this 6-channel variant. Cyrillic on Tesla gear is unusual too.
In my teens I enjoyed my share of repairing Tesla audio gear from former Czechoslovakia. I wouldn't touch it with 3,048m long pole again. My experience says that electrolytics will be dried out, connectors rusty, switches too, power cable is probably lost and unavailable in your country. PCBs made on cheap phenollic base and probably covered by conformal coating that is hard to solder through and smells absolutely horrific. As I'm typing this, I can still remember that stinch after decade or two. Random resistors may be dead and chassis seems to remember better days too.

50E is way too much, you'll need some more money to turn it into reasonable amplifier, so for PC speakers you better buy something else.
 

Offline ELS122Topic starter

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Re: what is this old amplifier?
« Reply #6 on: October 14, 2019, 09:28:36 pm »
Ok I’ll try dropping the price to 1€ and if he doesn’t accept well then I’ll look for something else! Note: the listing has been here since winter and no one has bought it  :-DD
But thanks for the advise
 

Offline ELS122Topic starter

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Re: what is this old amplifier?
« Reply #7 on: October 14, 2019, 09:33:50 pm »
My experience says that electrolytics will be dried out, connectors rusty, switches too, power cable is probably lost and unavailable in your country. PCBs made on cheap phenollic base and probably covered by conformal coating that is hard to solder through and smells absolutely horrific. As I'm typing this, I can still remember that stinch after decade or two. Random resistors may be dead and chassis seems to remember better days too.

Whit my experience working on soviet tube radios, those old capacitors seem to never die. Just don’t heat them up because that kills them for sure! But the electrolytics yes they are pretty much a 1k resistor to ground rather then a filter cap!

no, they do. but anyways I didn't buy it. I'll use diffrent amps for my "computer speakers"
« Last Edit: December 22, 2019, 01:49:07 am by ELS122 »
 


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