What are cold solder joints ? Also, I changed the toggle switch in my expensive guitar but know nothing about soldering. Any help or anything I should know would be appreciated.Re-read your post. You said it still hums. Probably something simple. Cold solder joints maybe.
It plays for about 10 minutes and then cuts out. I hit the on and off switch and then it comes back on.....Re-read your post. You said it still hums. Probably something simple. Cold solder joints maybe.
No mute button...As in no sound? Like a mute button engaged?
Lol... no.... I didn't even have the guitar yet. I was using my old one.Talk to someone who solders. They will know what cold solder joints are. Basically, you reheat/reflow a solder connection that looks suspect. Did the amp cut leaving only hum before you changed the guitar toggle switch?
Just replaced D9 with IN4731 1W 4.3V zener diode on my DSL 40C amp that would reliably mute after 10 minutes of hard playing. Ran it for over 6 hours playing on ultra gain channel at high volume through a dummy load without error after fix. Not sure I understand the circuit as I measured about 2.1V across diode before the fix and about 2.6V after, still below 3V threshold, but did not scope signal.
You know, I never timed it. But it just cuts out, the sound cuts off while the amp still buzzes...I turn it of and on again and there's sound. About 10 minute intervals.Rocker68 seems to be onto something with this resistor issue and maybe that is known thing.
I'm not an amp tech myself nor an EE.
One thing you can do, now or anytime, while owning a tube amp is stuff like this:
Clean the input jacks and FX loop etc. Use something like Dioxit for electronics, not WD40. Spray the jack (not the socket) and move in and out to clean it.
Clean the tube pins. Again, Dioxit. Spray the pins (not the sockets) and work the tube in and out to clean and lubricate.
Check tubes by tapping lightly on them with a pencil and also looking for s subtle glow. Bright orange or red = bad. No glow = bad. Can you hear the tapping sound through the speaker? = bad.
Plug guitar into FX return (if you have one) to see if problem remains. If it does - you can rule out the preamp section.
Check fuses. Sometimes you would need to open the amp up for any internal. As long as you don't touch anything inside the amp, especially with both hands at the same time, you should be fine.
You can swap preamp tubes while the amp is on. Never do that with power tubes.
But yeah - I'd be leaning toward a soldering issue as well with what you've described. Is it the same amount of time each time?
That's sounds like it's the issue. Does anyone have any instruction on doing it yourself? D9 should be pretty easy to identify. I have soldering equipment.Then what Rocker68 gave you is probably your culprit. Looks like a known issue with a Diode (D9) that 'mutes' out after 10 minutes.
No. I'm not using it at all right now... it's on ice for if I ever need it.... I'm using an SV20H and Origin 20H right now anyhow.Martymig,
Any follow up to your DSL 40c issue ?