I can give them a positive vote as well. I previously built a Precision bass from a Solo kit. Very basic of course. The saddle height screws kept backing out for no reason so I put some clear nail polish on them as a solution. The electronics were pre-wired. Mine had an unwanted noise. I...
(Bottlenecker post - My Champion 600 is going to be my four year old's mini bass amp for a bit).
You realize that speaker will have no chance of surviving once the bass is played through it?
Actually, I researched several articles in advance of buying. One of them - obviously wrong - indicated a straight drop-in. A case of you can't believe everything you read.
When I purchased my Cavalier '51-P PUP for my Bronco about a 18 months ago, the info I had was that it was a drop-in fit for a Bronco or Musicmaster. I was very disappointed to find that the pick guard had to be filed out to fit the PUP. Then I was furious to see that the pole pieces don't...
V2 preamp tube is the place to start. Swap it out with a known good tube.
If that doesn't fix things, relays may be the problem but for sure start with V2.
Every time I see a post about Bogen amps I mention this - there's high voltage DC on that terminal strip Rem#1, Rem#2. Ensure that gets disconnected from there.
I've owned and repaired SF and BF Champs/Vibrochamps. The very first thing I suspect is the 6V6. I guess these days you have to be sure you're getting a proper, healthy replacement. Next - bias tests as mentioned, closely watching for runaway current - which I don't think you'll get with a...
That's the best 'find' I've seen on any Forum. What a great project. There's been many replies with many opinions on how intense the cleanup may be. If it were me, I'd remove the nest, do a decent cleanup internally, then focus on the electronic restoration.
I could only dream of having this...
The original 5E3 amps have no power supply choke, only a 5K resistor. Total reduction of hum is never possible. If you're willing to do a mod, install a choke. I did that in a tweed Champ kit and it made a world of difference.
How's the hum? It would certainly be worth it to replace the power supply filter caps in addition to what was suggested by Birfl.
Does the tremolo circuit sound good? If it's not working or too slow/fast, replace the 3 caps in that area.
I'd replace all of the electrolytic caps. After that...
I gigged indoors (bars) and outdoors (parks) in a Classic Rock band using the Traynor SB-112. I sent an XLR to the PA. No problems at all being heard or felt.
I've retired from gigging and my at home amp is the SB-115 because 15s have always been my fave tone.
I have owned all Rumbles from 200...