Vintage BUSH Ampligram Help

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lifewater

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Dear friends,

I have been given a vintage BUSH ampligram with GERRARD changer by a friend of mine, on opening, found the wires in the amplifier all eaten by rats. I was able to power on the amplifier somehow and have even played it using cd player as source, however the BASS, TREBLE, BALANCE and VOLUME controls has not been connected as the wires as mentioned were eaten by rats.

Can someone please please help me with schematics, repair guides as I want to keep this amplifier. It uses transistors and the sound quality is mind blowing. By the way both the LEFT and RIGHT channels pcbs are mounted saperately.

Thanks in advance

lifewater
 
Buddy very vintage niche product.
Again must be a simple amp. any competant TV and Radio mchanic should be able to fix it
Or take a lot of picturesand start doing DIY with DIY community here!
 
Hey hemant,

thank you very much for your reply. Some pics of the amp board. Apparently it uses BEL make ad149 transistors for amplification - 2 per channel

cheers,

lifewater
 

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Hi Lifewater,

since you've managed to open the amp, why not replace the affected wires yourself, guess you can handle some soldering by yourself too, what say? Else go to a recommended audio repair shop in your locality.
BTW, can you give the exact model no of the bush so that someone can search the net for some info to help you further...

Regards
 
Last edited:
What are those pegion droppings on the amp ... did you leave it in the balcony or terrace? :)

Go to where the old market is in your town and find a radio/TV repair shop and enquire. Better to rely on experience rather than do something stupid and cause more harm...

HTH
 
denom said:
Hi Lifewater,

since you've managed to open the amp, why not replace the affected wires yourself, guess you can handle some soldering by yourself too, what say? Else go to a recommended audio repair shop in your locality.
BTW, can you give the exact model no of the bush so that someone can search the net for some info to help you further...

Regards
Click to expand...

Hi denom,

thanks for the reply. I can handle soldering, not a problem at all. But dont know which wire goes where as they were all cut. I did the rounds of the audio repair guys near my place of stay, but the people clued up with systems of that vintage are all no more. Dont want any gung-ho types to fiddle around and do more damage.

Thanks

lifewater
 
captrajesh said:
Hey Gobble,

Could you elaborate?;)

Rajesh
Click to expand...

A picture can tell a thousand droppings ...er words , for ex: look under the transformer that looks potted with wooden stands ... :)

Wonder what that is ... anyways that can be cured.

@Lifewater you will have to take a chance with a repair technician as it is going to be hard to find one who is a vintage specialist. Do you have the circuit diagram?

cheers
 
gobble said:
A picture can tell a thousand droppings ...er words , for ex: look under the transformer that looks potted with wooden stands ... :)

Wonder what that is ... anyways that can be cured.

@Lifewater you will have to take a chance with a repair technician as it is going to be hard to find one who is a vintage specialist. Do you have the circuit diagram?

cheers
Click to expand...

Gobble ji these are not wood stands but brass. Also I dont have any circuit diagrams, if I had would have fixed it up in a jiffy.

lifewater
 
lifewater said:
Gobble ji these are not wood stands but brass. Also I dont have any circuit diagrams, if I had would have fixed it up in a jiffy.

lifewater
Click to expand...

Hmmm di dyou try googling? You might get lucky.

Whats the proper part number?

Thanks
 
Looking at the pics, are those Red tubular capacitors branded HUNTS? Or moulded plastic types? If yes than change them ASAP. All of them. They are a disaster waiting to happen. Also change those elcos. Give a general clean. Use a non-corrosive contact cleaner (not WD-40) on the pots and those presets. Check their wiper legs. They should be making proper contact. They bias the output transistors and if damaged can quickly burn the pair. And while at it please be reminded that those BEL AD139 are germanium transistor. Have not seen them in a long time, so its worthwhile to take the precautions should you not want to end up with a dead amp. Remember this equipment has woken up after a big sleep, but parts of it may still be sleepy.

Try to trace where the volume and tone control wire go. It should not be too difficult. The good news is that the amp is working so it so it could be an interesting restoration project.
 
aks07 said:
Looking at the pics, are those Red tubular capacitors branded HUNTS? Or moulded plastic types? If yes than change them ASAP. All of them. They are a disaster waiting to happen. Also change those elcos. Give a general clean. Use a non-corrosive contact cleaner (not WD-40) on the pots and those presets. Check their wiper legs. They should be making proper contact. They bias the output transistors and if damaged can quickly burn the pair. And while at it please be reminded that those BEL AD139 are germanium transistor. Have not seen them in a long time, so its worthwhile to take the precautions should you not want to end up with a dead amp. Remember this equipment has woken up after a big sleep, but parts of it may still be sleepy.
Click to expand...

Wow! This looks like a "Waking up Kumbhakarna" project!! :ohyeah:

Should be interesting story to tell grandchildren ... :)
 
aks07 said:
Looking at the pics, are those Red tubular capacitors branded HUNTS? Or moulded plastic types? If yes than change them ASAP. All of them. They are a disaster waiting to happen. Also change those elcos. Give a general clean. Use a non-corrosive contact cleaner (not WD-40) on the pots and those presets. Check their wiper legs. They should be making proper contact. They bias the output transistors and if damaged can quickly burn the pair. And while at it please be reminded that those BEL AD139 are germanium transistor. Have not seen them in a long time, so its worthwhile to take the precautions should you not want to end up with a dead amp. Remember this equipment has woken up after a big sleep, but parts of it may still be sleepy.

Try to trace where the volume and tone control wire go. It should not be too difficult. The good news is that the amp is working so it so it could be an interesting restoration project.
Click to expand...

A big thank you to u aks, Will give it a clean up and have already purchased the presets these are wonky and needs replacement. I have managed to click some pics of the ampligram, which I am uploading, but to repair this amp I will need help from all of you, thanks once again.

gobble said:
Wow! This looks like a "Waking up Kumbhakarna" project!! :ohyeah:

Should be interesting story to tell grandchildren ... :)
Click to expand...

Yes the amp said GOOD MORNING - let me eat some of the newer amps for breakfast, but now is suffering from age related diseases hence the urgency to repair it.
 

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Update :- Amp fully restored - recapped and wires connected into right places by a old timer who could barely see and was unable to solder so it was done by me. He was a very renowned service engineer for bush products in the 60-70s.

Cheers

lifewater
 
Dear friend,
You are lucky to get a classic amplifier with a Garrard record player.Garrard as you know is a legend by itself.Please try to restore it and enjoy.You may get more information about Garrard record players in the website garrard501.com.Happy listening.
Sincerely,
pksnathan
 
Audiolab 6000A Integrated Amplifier
Purchase the Audiolab 6000A Integrated Amplifier at a special offer price.

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