Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: p2pAmps on February 28, 2016, 07:25:07 am

Title: Bassman AA864 Project
Post by: p2pAmps on February 28, 2016, 07:25:07 am: Here is a 69 Bassman rebuild I am messing around with for a customer. It had a very sick PT so soon as the new one shows I will finish it up. I am using Doug's G10 eyelet board and man I love those things. If you haven't tried one I think you should give one a try.

(http://p2pamps.com/69bassman/9.jpg)
(http://p2pamps.com/69bassman/10.jpg)
(http://p2pamps.com/69bassman/11.jpg)
(http://p2pamps.com/69bassman/12.jpg)
Title: Re: Bassman AA864 Project
Post by: Willabe on February 28, 2016, 08:44:43 am: Nasty looking PT. :w2:

Where did you get all the yellow Mallorie 150's?
Title: Re: Bassman AA864 Project
Post by: p2pAmps on February 28, 2016, 08:47:45 am: Yellow Mallorys came from Doug
Title: Re: Bassman AA864 Project
Post by: eleventeen on February 28, 2016, 11:06:20 am: Yeah, that PT looks like an excellent candidate for Burnt Transformerfest 2016. Wow!
Title: Re: Bassman AA864 Project
Post by: p2pAmps on February 28, 2016, 11:27:15 am: If I was going to have it rewound where would I send it? Heyboer perhaps? Is it worth it?
Title: Re: Bassman AA864 Project
Post by: eleventeen on February 28, 2016, 09:17:36 pm: You'll have to get a quote. I can't imagine it being worth it; for them to set up a one-off has got to be time consuming and the tranny itself is certainly nothing special. In a transformer, the laminations actually have to be insulated from each other. So while I am sure that Heyboer (for one, surely there are other rewind svces) knows very well what they are doing, I myself would kind of be concerned that a tranny whose innards were soaked in smoke with perhaps some charring might not be able to be successfully rewound. They'd have to take the tranny apart clean, then coat the lams with a new insulating coating. Tedious.

I'm sure Heyboer will gladly give you a quote but my bet is that it would be double what a new generic replacement would cost and I'd bet they'd say the same. Free to enquire, though.
Title: Re: Bassman AA864 Project
Post by: Willabe on February 28, 2016, 09:38:38 pm: Quote from: eleventeen on February 28, 2016, 09:17:36 pm
You'll have to get a quote. I can't imagine it being worth it; for them to set up a one-off has got to be time consuming and the tranny itself is certainly nothing special.

I'm sure Heyboer will gladly give you a quote but my bet is that it would be double what a new generic replacement would cost and I'd bet they'd say the same. Free to enquire, though.

Agree.
Title: Re: Bassman AA864 Project
Post by: p2pAmps on February 29, 2016, 01:59:47 am: Yeah, I have never sent one out before so I didn't know what to expect. I have heard of people rewinding transformers but I have zero personal experience.
Title: Re: Bassman AA864 Project
Post by: p2pAmps on March 03, 2016, 03:26:49 am: This is done and ready to go out now. I really just love Bassmans

(http://p2pamps.com/69bassman/13.jpg)
(http://p2pamps.com/69bassman/15.jpg)
Title: Re: Bassman AA864 Project
Post by: plexi50 on March 05, 2016, 09:02:31 pm: Beautiful work. I love your ultra neat heater wiring. Hell i cant do that good. Need classes and glasses.
Title: Re: Bassman AA864 Project
Post by: DummyLoad on March 06, 2016, 12:34:17 am: very nice work.

mike, do you prefer the AA864 ckt over the AB165 ckt?

--pete
Title: Re: Bassman AA864 Project
Post by: p2pAmps on March 06, 2016, 06:39:50 am: Quote from: DummyLoad on March 06, 2016, 12:34:17 am
very nice work.

mike, do you prefer the AA864 ckt over the AB165 ckt?

--pete

Hi and thx. As far as the Bassman goes I do prefer the sound of the AA864. It feels more chimey and transparent to my ears. A lot of the bigshot session guys in town prefer it as well and I trust their ears over mine.
Title: Re: Bassman AA864 Project
Post by: Willabe on March 06, 2016, 03:25:45 pm: Which channel are you guys playing through, normal or bass?