Got an amp. Demo Beatles cover page 5

Make it loud here.
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Fiddy
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Got an amp. Demo Beatles cover page 5

Post by Fiddy » Wed Jan 18, 2023 7:11 pm

Early Traynor YBA something .. i drove 3 hours for it. It was dirty as fuck when i first saw it. It looks a bit better now, but will try to get it nicer looking..

It uses 7027As in the power section . Seems to be stock. Even the tubes. Still has the old power cord, so I didn’t plug it in yet. I actually don't know that it works. The dude that sold it to me said he powered it on briefly and the light came on, but that because he didn't have a cab, he didn't know if it worked or not .:fp:

I took a chance. It wasn't that cheap either... But still not bad if it ends up working fine. Ill work on it tomorrow . I'm very tired after the drive .

I have the grill btw. im just drying it off close to a heater..

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Last edited by Fiddy on Fri Mar 24, 2023 9:02 pm, edited 1 time in total.
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Fiddy
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Re: Got an amp.

Post by Fiddy » Wed Jan 18, 2023 7:45 pm

Cleaner. The good thing is that it doesn't smell like smoke .

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Re: Got an amp.

Post by Fiddy » Wed Jan 18, 2023 8:48 pm

I got curious ... :fp:

:w00t: 8)

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Burned resistors.. :(

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Re: Got an amp.

Post by OffYourFace » Wed Jan 18, 2023 8:59 pm

Cool! hopefully it works nicely once you do some basic maintenance.
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Re: Got an amp.

Post by Fiddy » Wed Jan 18, 2023 9:05 pm

What's the purpose of that big ass brown cap that goes to the switch and the OT? Anyone know?
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Re: Got an amp.

Post by OffYourFace » Wed Jan 18, 2023 9:27 pm

tribi9 wrote: ↑
Wed Jan 18, 2023 9:05 pm
 What's the purpose of that big ass brown cap that goes to the switch and the OT? Anyone know?
What's the value? At that size, I'd assume it's a dual cap? What's the model of this amp?
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Fiddy
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Re: Got an amp.

Post by Fiddy » Wed Jan 18, 2023 9:35 pm

It's a YBA-1, one of the earlier ones as mentioned, this has 7027As.

The value is 80 uf @ 450 v

Here is the schematic .

YBA-1 Schematic
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Re: Got an amp.

Post by OffYourFace » Wed Jan 18, 2023 9:55 pm

Main power filter
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Re: Got an amp.

Post by Fiddy » Wed Jan 18, 2023 10:01 pm

Awesome . Thanks Mike.
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Re: Got an amp.

Post by OffYourFace » Wed Jan 18, 2023 10:29 pm

tribi9 wrote: ↑
Wed Jan 18, 2023 10:01 pm
 Awesome . Thanks Mike.
No Prob... my one concern is I think those burned up resistors are part of your phase inverter ckt. I'd replace those, replace the cap cans and V3 before turning on. But that's just my guess from looking at these pics.
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Re: Got an amp.

Post by øøøøøøø » Wed Jan 18, 2023 10:51 pm

Concur with above.

Cool amp!
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Re: Got an amp.

Post by Fiddy » Thu Jan 19, 2023 4:57 am

OffYourFace wrote: ↑
Wed Jan 18, 2023 10:29 pm
tribi9 wrote: ↑
Wed Jan 18, 2023 10:01 pm
 Awesome . Thanks Mike.
No Prob... my one concern is I think those burned up resistors are part of your phase inverter ckt. I'd replace those, replace the cap cans and V3 before turning on. But that's just my guess from looking at these pics.
Replace V3?
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Re: Got an amp.

Post by Dr Tony Balls » Thu Jan 19, 2023 7:30 am

Excellent amp. Very plexi-style.
Instagram: thetonyballs
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Re: Got an amp.

Post by OffYourFace » Thu Jan 19, 2023 8:50 am

V3 is the phase inverter tube. The one closest to the power tubes.
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Re: Got an amp.

Post by Fiddy » Thu Jan 19, 2023 9:31 am

Yes ,but why would V3 be bad?

I was just going to recap it, replace the two 470 ohm burned resistors and add a grounded power cord.

The tube looks physically fine. Do you think it might be bad?
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