Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: LooseChange on February 21, 2012, 08:34:02 am

Title: Ampeg B-15 build
Post by: LooseChange on February 21, 2012, 08:34:02 am

Here is an Ampeg B-15 bass amp build. It's one channel and based on the earliest circuit. Cathode biased, all octal. The entire amp was squeezed into a Champ sized chassis.
Sorry, no gut pics... Forgot to shoot.

Title: Re: Ampeg B-15 build
Post by: tubenit on February 21, 2012, 11:44:17 am

Wow!  That's in pristine shape.  Thanks for sharing the photo.

With respect, Tubenit

Title: Re: Ampeg B-15 build
Post by: tdvt on February 21, 2012, 12:03:49 pm

That looks like a nice small, simple rig.

As a bass player, I wish I had had the $$'s to pick up one of the real ones years back, big bucks now. Building a single channel version like that one is high on my list of amp projects

Best, TD

Title: Re: Ampeg B-15 build
Post by: Willabe on February 21, 2012, 12:14:25 pm

As always very nice.



                  Brad        :icon_biggrin:

Title: Re: Ampeg B-15 build
Post by: HotBluePlates on February 21, 2012, 06:02:35 pm

I like how you retain some of the Ampeg styling in the mostly-Fender type cabinet. The front panel and Ampeg stove knobs are quite cool!

Title: Re: Ampeg B-15 build
Post by: LooseChange on February 22, 2012, 05:29:28 am

Thanks guys... The picture does not do justice to the faceplate. It has the same graphics as the original. Those knobs are hardware store bought. I am not the cosmetics designer. My friend comes up with all the stylin'.
Here is a better picture of the face plate.

Title: Re: Ampeg B-15 build
Post by: tdvt on February 22, 2012, 08:49:14 am

The faceplate DOES look cool. What method did you use for that one? I'm in a quandary researching faceplate methods for the Tweed-configured AB763 I'm working on. Just want simple lettering.

Title: Re: Ampeg B-15 build
Post by: loudthud on February 23, 2012, 08:29:48 pm

Nice looking face plate. What transformers did you use? Any pictures of the insides?

Title: Re: Ampeg B-15 build
Post by: Madison on February 23, 2012, 09:15:05 pm

Nice!
Anymore info on this?
I am getting ready to build one myself.

Title: Re: Ampeg B-15 build
Post by: LooseChange on February 25, 2012, 06:49:43 am

Built this one on the cheap... I didn't source the parts but chassis and iron are from Allen Amplifiers. He makes a stainless steel chassis (looks like a kitchen appliance). I won't use that again because its way too hard to drill.
Sorry, no gut pictures but most of the layout was taken from a gut picture of a reissue.
Having a 1x15 ported cabinet made now. Should be just like the cab from the fliptop.