Search found 3 matches

by Superhorndog
Wed May 12, 2021 3:21 am
Forum: Marshall Discussion
Topic: Marshall 4101 overheating
Replies: 5
Views: 2579

Re: Marshall 4101 overheating

No drop in V+. I'm biased at 60% dissipation and still the caps get hot. Just recieved some new caps. Going to check the amp draw before I switch them out.
by Superhorndog
Fri May 07, 2021 8:48 pm
Forum: Marshall Discussion
Topic: Marshall 4101 overheating
Replies: 5
Views: 2579

Re: Marshall 4101 overheating

I'm thinking these caps are the issue. I took before pictures as I always do before I changed them and they are 100% wired correctly. I'm going to order up some JJ filter caps as I typically use those and have never had an issue.
by Superhorndog
Thu May 06, 2021 7:16 pm
Forum: Marshall Discussion
Topic: Marshall 4101 overheating
Replies: 5
Views: 2579

Marshall 4101 overheating

Working on a 4101 combo. Just finished a recap and biased in a new set if EL34's at 32ma. Amp is running a 440v plate voltage. Sounds good except it wants to run hot after 15 minutes or so. Main filter capacitors are at 200 degrees which is way too hot. Stock ones were replace with F&T's. Wiring is ...