Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: ListerHayes on September 08, 2020, 01:41:41 pm

Title: Fender Ramparte Issue
Post by: ListerHayes on September 08, 2020, 01:41:41 pm

I was playing my Ramparte and everything went silent.  No hum, no nothing.  Cracked her open and saw that a radial cap had blown.  Replaced the cap, and still no sound.  Replaced the tubes, and still no sound.  Tried to track the problem down with the schematic, but no luck.  This morning, I was looking it over again and noticed a bunch of goo on the OT.  Is this normal?  I've never seen one like this. 

Title: Re: Fender Ramparte Issue
Post by: sluckey on September 08, 2020, 01:46:00 pm

That's normal. The manufacturer dipped the transformer in varnish.

Title: Re: Fender Ramparte Issue
Post by: ListerHayes on September 08, 2020, 02:20:41 pm

Quote from: sluckey on September 08, 2020, 01:46:00 pm

That's normal. The manufacturer dipped the transformer in varnish.

Great, thanks for the help!  Now it's back to the drawing board...

Title: Re: Fender Ramparte Issue
Post by: tubeswell on September 08, 2020, 06:18:08 pm

So you put a new (correctly rated) mains fuse in after you replaced the blown capacitor - right?

Title: Re: Fender Ramparte Issue
Post by: ListerHayes on September 09, 2020, 11:52:03 am

Quote from: tubeswell on September 08, 2020, 06:18:08 pm

So you put a new (correctly rated) mains fuse in after you replaced the blown capacitor - right?

Yes Sir.  Original fuse wasn't blown, but I swapped it out anyway.   

Title: Re: Fender Ramparte Issue
Post by: shooter on September 09, 2020, 12:54:51 pm

Quote

Tried to track the problem down with the schematic, but no luck.

maybe post what you're looking at, might help us to help you.


are all the DC volts good?
are you sure the speaker out is good?
bias volts?
edit: pcb amp?