first time builder champ problem

[JHow]

Cool. I didn't realize this was pcb. I assumed eyelet board. Anyhow, the three yellow wires in picture 3 are the ones that give me the most troubles. Also how, are the jacks grounded? It is kind of dark on the photo.

[mitch]

Just from a real quick look...get your heater wires down closer to the chassis,push the heater socket pins down so you can have your heater wiring as close to the chassis as possible without shorting to the chassis. Get your wiring to the 12ax7 pins 3 & 8 down closer to the chassis as close as possible and wiring to pins 1,2 & 7 coming down to the top of the socket and away from other wiring as much as possible.

[cmill24]

both input jacks are wired to separate ground tabs directly on the PCB.

[cmill24]

thanks for the suggestions, will try that when I get home from work today.

[mitch]

Yeah hopefully you'll have some more advice by then because as I said I'm still new at this myself.

[JHow]

...pins 1,2 & 7 coming down to the top of the socket and away from other wiring as much as possible.

I second this advice. You don't want noise in the grid wires. I'm more used to the eyelet board style, but these are the ones I use shielded wire on. From what would be your "m" to pin 2 and from the center of the vol pot to pin 7. You may notice some change in the oscillation if you chop stick these wires.

[Mandopicker]

As previously suggested, remove that red wire from the center tab of the volume control and use a shielded wire instead. (Grounding the shield at one end only.)

Short of doing that, I would at least reroute that red wire so that it does not go under the board and see if that doesn't help the oscillation.

(Either way I would not route it under the circuit board.)

Just my 2 cents.