Hi,
I'm having a couple issues that are resulting in left channel noise, it alternates between a light scratchy crackling sound and semi high pitched electric buzzing.
I've done a lot of wicking solder away and then resoldering, I put particular effort into:
I've also carefully tired to redo the connections on the 9 pin socket but was a bit worried about overheating and cooking the LEDs.
One area that I have not properly wicked and resoldered is the area around the 270Ω 5W wirewound resistor and the 270KΩ 1W resistor (13L), I can't really reach it properly and the leads for the stuff around there are pretty short.
Could I get some help narrowing down where the issue is? Or at least pointed towards all the left channel things.
I can provide pictures and voltages and stuff, but I thought that this post was already too long; I'll wait for confirmation of what would be most useful first.
Cheers,
Ryan
I'm having a couple issues that are resulting in left channel noise, it alternates between a light scratchy crackling sound and semi high pitched electric buzzing.
- The noise still occurs when the amp is disconnected from a source with the volume turned down, and it is intermittent.
- Changing the tubes changes the sound profiles a little but the issue persists.
- Sometimes when the electric buzz is happening flicking/wiggling the power tube makes it stop for a split second.
- The noise seems harder to reproduce when it is on it's side or upside down... ??
- Prodding at the joints and cables with a chopstick hasn't told me where the issue may be. I think I prodded against some of the connections so much that I caused new issues that I had to then fix.
I've done a lot of wicking solder away and then resoldering, I put particular effort into:
- The octal socket
- Both Speedball PCBs
- The connections to the PCBs (replaced most wiring with the wire from the Crack kit instead of the thinner Speedball wire as I didn't have the right tool to strip it properly.)
- The black wires in the corner of the headphone jack
- The RCA jacks
I've also carefully tired to redo the connections on the 9 pin socket but was a bit worried about overheating and cooking the LEDs.
One area that I have not properly wicked and resoldered is the area around the 270Ω 5W wirewound resistor and the 270KΩ 1W resistor (13L), I can't really reach it properly and the leads for the stuff around there are pretty short.
Could I get some help narrowing down where the issue is? Or at least pointed towards all the left channel things.
I can provide pictures and voltages and stuff, but I thought that this post was already too long; I'll wait for confirmation of what would be most useful first.
Cheers,
Ryan
