[Bmac65]

Hello! I just pulled my old 1972 Traynor YGM-2 out of storage after about 30 years of sitting untouched. I thought I'd do a 3-prong conversion (I'm familiar and comfortable with such a repair). But after opening the amp I noticed one of the leads on the filter cap is cut. I was wondering if anyone knew where that lead is supposed to go (the schematics I have aren't very clear)? The amp seems to work fine as is (but I honestly haven't tested it thoroughly). See attached. Any information would be greatly appreciated!

Thanks!

Bruce

 

[greco]

Welcome to the forum! Very interesting first post/thread.
I am interested in electronic and will be following your thread for sure.
With my limited knowledge, I find it fascinating that the amp seems to work fine as is.

There are many amp builders and techs here that will hopefully comment soon.

Again, welcome. Please post/contribute and start threads often.

BTW...Someone is bound to ask you for pics of your gear.

Got any pics of your gear? ...LOL

 

[Jimmy_D]

Looks like a multi-section or dual cap only using one side, did it come from the factory like that?

 

[Bmac65]

Thanks for the warm welcome! I've been reading the forum here for years but have never posted.

"...did it come from the factory like that?"
Not that I know of. I picked this amp up around 1982 when I worked in a music store. The amp was well used as a rental. I can see some obvious repairs made so it's no surprise something might be of whack!

 

[jb welder]

I think it could actually be stock. Both versions of the schematic I have show 3 filter caps of 40uF in the power supply section.
I can see 2 of the lugs on the can cap are used, leaving only 1 more section needed. They used one side of the dual 'dynamite stick' and snipped the unused wire off. They probably had lots of stock of those to use up, and it was no more expensive for them than to use singles.
Are the sections used of the can cap each 40uF? Is the 'stick' a dual 40uF?

 

[Bmac65]

I think it could actually be stock. Both versions of the schematic I have show 3 filter caps of 40uF in the power supply section.
I can see 2 of the lugs on the can cap are used, leaving only 1 more section needed. They used one side of the dual 'dynamite stick' and snipped the unused wire off. They probably had lots of stock of those to use up, and it was no more expensive for them than to use singles.
Are the sections used of the can cap each 40uF? Is the 'stick' a dual 40uF?

Right - that does make sense. Yes, the sections of the can cap are 40uF and the stick is a dual 40uF. Thanks!!

 

[nonreverb]

I think it could actually be stock. Both versions of the schematic I have show 3 filter caps of 40uF in the power supply section.
I can see 2 of the lugs on the can cap are used, leaving only 1 more section needed. They used one side of the dual 'dynamite stick' and snipped the unused wire off. They probably had lots of stock of those to use up, and it was no more expensive for them than to use singles.
Are the sections used of the can cap each 40uF? Is the 'stick' a dual 40uF?

Looking at the picture it appears so.

 

[Bmac65]

Well it appears you're all correct - seems like it's stock. I see it now with a look at a better schematic (thanks JB Welder). And, I found a comment on Youtube that describes this exact scenario for their YGM2. I really appreciate all your feedback!!!