Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Mungo Park on May 14, 2021, 04:19:38 pm

Title: cee jay11 amp voltages
Post by: Mungo Park on May 14, 2021, 04:19:38 pm

I am wanting to build a cee jay 11 by Devide by 13.
I have the schematic but it has no voltages on it.
Would anybody have the voltages for this amp.
What I would really need is the voltages on the plates.
 

Title: Re: cee jay11 amp voltages
Post by: sluckey on May 14, 2021, 05:01:01 pm

Why do you need plate voltages? The PT voltages are listed. Just use that PT, build the amp, measure voltages after the fact.

Title: Re: cee jay11 amp voltages
Post by: shooter on May 14, 2021, 05:04:52 pm

also guessing it's a "proven" design

Title: Re: cee jay11 amp voltages
Post by: Mungo Park on May 14, 2021, 05:10:40 pm

Thanks for the answer, very simple and easy to follow instructions.
                           Cheers Ron

Title: Re: cee jay11 amp voltages
Post by: pullshocks on May 14, 2021, 05:45:00 pm

Quote from: shooter on May 14, 2021, 05:04:52 pm

also guessing it's a "proven" design

There have been a few builder reports of success.  As I recall, DarkBlueMurder was one.  I have breadboarded it, and it sounded good.


Edit--you might want to leave room in your layout for PI grid stopper.

Title: Re: cee jay11 amp voltages
Post by: Mungo Park on May 14, 2021, 08:40:12 pm

I have herd some good things about this amp, which is what attracted it to me, I have a fender selection so this should be a little different.

 Looking at my power transformers. the closest I have is 330 0 330 but i guess I can figure out a filter cap/resistor combo to compensate for a higher starting voltage.
 

Title: Re: cee jay11 amp voltages
Post by: sluckey on May 14, 2021, 08:48:27 pm

Quote

Looking at my power transformers. the closest I have is 330 0 330 but i guess I can figure out a filter cap/resistor combo to compensate for a higher starting voltage.

Bad idea IMO.

Title: Re: cee jay11 amp voltages
Post by: Mungo Park on May 15, 2021, 09:32:25 am

Well I was thinking if I used. 5y3 rectifier tube this would drop me down to a more compatible voltage which would still need some adjustments