need, replacement power transformer for a skylark GA-5T

[jawz]

The power transformer on my skylark is toast, sizzling and extremely hot. Does anyone know of the replacement part number for that model.

 

It has only loudness and tremolo knobs on front. I think the transformer is a "TF-5A-P". Can anyone recommend a company that makes one for the skylark? Also,

 

I just need to confirm that the replacement electrolyte filter caps are, 22MFD @ 450volts

[fhartery]

Look at Antique Radio Supply.

 

http://www.tubesandmore.com/products/transformers_chokes?sort=recommended&page=ALL&filters=Type%3DPower

 

The 6AQ5 is equivalent to a 6V6 suggesting at total audio power output of about 25 watts in your push pull finals. The secondary is 240-0-240 and you will require a 6.3V volt filament winding too.

 

http://www.gibson.com/Files/schematics/GA-5T.jpg

 

By all means, call AES (or email them) yourself and discuss this schematic with them. You may want to also get a physical match to the power transformers physical footprint to be really happy here?

 

However, an overheating transformer usually suggests a circuit problem say for example a component that has gone shorted. Usually the input fusing protects you here. It 'must' be a one amp fuse. Never, never... replace it with anything higher

 

If you are not experienced with electronics yourself, (pretty please) take it to a repair shop! You might get electrocuted!!!!!

[jawz]

Thanks, yes I am experienced in electronics, so I know all the safety stuff.

Seriously, thanks for asking though. :)

 

It has been a while since I delved into a guitar amplifier.

thanks for the info provided, that is very helpful.

I will call those guys and check on a transformer.

 

it looks Like what happened is the 6X4 rectifier tube

shorted out, causing the transformer to overheat and

damaged it. so I need to get both. the secondary windings on the transformer

is shorted out.

 

The only other thing is the Filter caps, I just need to make sure 22MFD @ 450 volts is ok

or is there better cap to use rather than the electrolytic?

 

Thanks again for all the help and the links :)

[retrorod]

Look at Antique Radio Supply.

 

http://www.tubesandm...rs=Type%3DPower

 

The 6AQ5 is equivalent to a 6V6 suggesting at total audio power output of about 25 watts in your push pull finals. The secondary is 240-0-240 and you will require a 6.3V volt filament winding too.

 

http://www.gibson.co...atics/GA-5T.jpg

 

By all means, call AES (or email them) yourself and discuss this schematic with them. You may want to also get a physical match to the power transformers physical footprint to be really happy here?

 

However, an overheating transformer usually suggests a circuit problem say for example a component that has gone shorted. Usually the input fusing protects you here. It 'must' be a one amp fuse. Never, never... replace it with anything higher

 

If you are not experienced with electronics yourself, (pretty please) take it to a repair shop! You might get electrocuted!!!!!

 

Good advice! Some of these amps are known as "Widow-Makers".....

[jawz]

Good advice! Some of these amps are known as "Widow-Makers".....

[thumbup]

[gtfromftworth]

Well, I'm working on a Crestline Sklylark also...similar problems and more. This address may contain a link to a schematic for you:

http://www.0rigami.com/gg/amps.html#GA-5_Skylark_Crestline

 

You need a couple of 20 or 22uF caps in the power supply, and it seems everyone uses radial electrolytics..for good reason. Mine had a dual 20, and I think Tube Depot has a Dual 20 can for about $30 that you can use if you ground it...but a pair of 22uF radials in the power supply should be great.

 

Mercury Magnetics has your transformer. Mine is going to cost $125...ouch.