Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Tone Junkie on July 13, 2010, 04:42:09 pm

Title: Tremolo troubles ab763 new build
Post by: Tone Junkie on July 13, 2010, 04:42:09 pm

Man I started it up everything seemed fine till I got to the reverb and tremolo. have new tank the on way for verb but now have to troubleshoot trem.  :cry: Bill

Title: Re: Tremolo troubles ab763 new build
Post by: sluckey on July 13, 2010, 04:53:42 pm

Can you show us the schematic or layout you're working with?

Title: Re: Tremolo troubles ab763 new build
Post by: Tone Junkie on July 13, 2010, 05:32:25 pm

https://taweber.powweb.com/store/6a40_layout.jpg
This one is just like it but el34,s instead of 6l6 same trannies and all.
I can get the fender sch. in a few. Thanks Bill

Title: Re: Tremolo troubles ab763 new build
Post by: sluckey on July 13, 2010, 07:16:22 pm

That trem circuit requires a shorting plug or footswitch (contacts closed) plugged into the footswitch jack to work. Have you done that?

Title: Re: Tremolo troubles ab763 new build
Post by: Tone Junkie on July 14, 2010, 01:02:53 am

Yes the first problem I had with the board was I bought one of those optioisolater things instead of making my own and had the damndest time figuring out which way was which but I got that figured i need to go through and check all my voltages again. Hey slucky do you still have that visio file for the ultimate marshall you did. Thanks Bill

Title: Re: Tremolo troubles ab763 new build
Post by: sluckey on July 14, 2010, 06:41:19 am

Quote

do you still have that visio file for the ultimate marshall

yes. Is your published email addy valid?

Title: Re: Tremolo troubles ab763 new build
Post by: Tone Junkie on July 14, 2010, 05:52:22 pm

Yes thank you . The nice thing about the one you have you gave them both bright and normal channels .

Title: Re: Tremolo troubles ab763 new build
Post by: Tone Junkie on July 14, 2010, 05:54:16 pm

How would I make a quick test lead to check my switch its old. I got it with the music man amp chasis this is built on. Thanks Bill

Title: Re: Tremolo troubles ab763 new build
Post by: sluckey on July 14, 2010, 06:48:37 pm

Quote

I  am waiting for a visio program to come in that i bought cheap. which version do you use.

So, you don't even have Visio? There's a moderate to steep learning curve. The file was last saved in Visio 2010 format, which has only been out for a couple weeks. Maybe I should just send you a pdf version.

Quote

How would I make a quick test lead to check my switch its old.

What are you talking about? A tremolo footswitch? If so, just put a jumper wire between the center terminal of the trem FS jack and chassis. A properly bent paper clip will do the job. Use a gator clip test lead if you got 'em. If you ain't got 'em, go to Radio Shack, cause you're gonna need 'em if you stay in this stuff.

Title: Re: Tremolo troubles ab763 new build
Post by: Tone Junkie on July 15, 2010, 12:03:56 am

Thanks my friend I will just use an alligater clip like you recomended. My daughter is an ace with visio even though ive never used it . she said she could pretty much do what ever I wanted and show me how. I was getting the 2003 version but it probably wouldnt work with what you have. But thank you for the offer. Bill