Yup, you are correct. Back to the drawing board!.
Haven't had a chance to make much progress. I made a new sub-chassis plate that will allow me to measure and tweak the circuit much more easily. I'm hoping to wire it up sometime this week. This is a bit of a busy week for me, so no telling how much time I'll get to devote to it.
Sure, I could do that. I have some nice tinned copper buss wire I've used before. Any thoughts on other aspects of the layout?You don't need a whole turret strip if all those lugs are ground lugs. In the front middle where your LEDs connect, string a piece of buss wire across the chassis between those two turrets. At the top of the photo, you have a turret where the ground buss lands. Between that turret and the middle of the wire going across the chassis at the front, put in another piece of buss wire.
If you use 16 or 18 AWG buss wire, it will be plenty stiff and more than strong enough to hold what's mounting to it.
I have had several sowter SUTs and use one currently, the new ones with the OCC wire sounded better than the standard and vintage ones I have compared and I thought favourable to the lundahl ones as well. All 1:10 ratio.Any recommendations as to SUTs? I'm considering the Sowter brand for about $200 a pair. These can be ordered in octal base making removal or swapping a cinch; versus Lundahl at $225 or so a pair. Other ideas welcome.
I'm sure I'm missing something but I thought the ground buss was to float in the audio chassis only connected at the negative terminal of the D3a cap negative terminal. I'll try rearranging the parts as you suggest.I would move everything up closer to where the input jacks are and have the big output coupling caps at the other end of the chassis. The signal level is high at the output end, so that circuitry isn't so sensitive. The little impedance/capacitance switch board could be on the vertical walls, perhaps centered between the RCA jacks.
The ground buss looks nice, don't forget to secure it to the chassis at the input end where the ground post for your turntable will be.
DIY Layout Creator: Software > DIY Layout Creator : DIY Fever – Building my own guitars, amps and pedalsTwo things.
1 - what program are you using for that diagram?
2 - re: D3A cathodes, I tied the two cathode pins together with a short piece of wire. pins 3 and 8 iirc, though please double check as I don't have the data sheet in front of me atm.