Sound with pot at 0 + hum.

[Paul Birkeland]

I would give 15L some attention.

Why would you need 270 ohm 5W resistors?  If you need to replace the one that spans the terminal strips, you'll need a Xicon 270 ohm 5W resistor or a 270 ohm 10W resistor, otherwise the leads won't reach. 

I would install this mod before you do anything else to your kit:
https://forum.bottlehead.com/index.php?topic=11676.0

[tchevy]

It's also possible I just fixed the hum. When I pulled the SB boards and resoldered I ran a couple new wires, one being the left channel from the Pot to A2. It seems I literally didn't solder it at all. Obviously was well crimped, but I soldered that. Unbelievably stupid oversight.

- The 270 ohm 5W was only because initially I had one of the transistors on the large speedball shorting, ran it for ~ 10 sec so that resistor from terminal 13L - 15L got quite hot. Probably fine, was just gonna pick it up in case.

- I was also planning on ordering those diodes as well. Found them from your sticky.

Anyhow will see whether that resolves the issue or if the hum returns like before. If so I'll order those resistors and diodes, not sure if I can source the diodes in town so if Im paying the shipping I'll just order the lot of them.

[Paul Birkeland]

Unbelievably stupid common oversight.

A second set of eyes can often see our mistakes more easily than we can, especially if you are married to said set of eyes

[Deke609]

It seems I literally didn't solder it at all. Obviously was well crimped, but I soldered that. Unbelievably stupid oversight.

Join the club! I've found well-crimped but totally unsoldered joints in my amps more than a year after the initial build while doing some unrelated mod or another.  And it always surprises me. I blame my propensity for bleary-eyed late night building -- but I have no plans to change. You gotta find time somewhere, right?

cheers, Derek

[tchevy]

Haha well thanks guys. Don't feel quite as bad.

We'll see if this holds up.

Also found some 1N5408 in town so I'll pick some up and do that mod. The interference is 100% my wireless router so not sure if this make a difference but we will see. I'm assuming its picking up the interference after the pot padding, read the higher impedance may make it more susceptible to RF and the like.