I just got the 5814a tubes I ordered today, along with some other stuff like sockets, RCA jacks and heatshrink. A couple thoughts and questions...
they're a lot smaller than i thought. for some reason I thought these things would be like at least film canister size. This probably means the whole Hammond case will also be a lot smaller than I thought as well.
there are NINE pins! I thought this thing was supposed to be an 8-pin tube... why are there only eight pins as indicated on the 12AU7 variation schematic? D: do I just ignore pin 9?
also, I'm having a heck of a time getting my tubes to insert into the sockets I ordered. I've tried wiggling the pins around but one socket refuses to have a tube put into it. is this what I get for ordering cheap sockets, or is there a way around it?
I had the bright idea of using a variable resistor/pot (rheostat?) for RLED, but I don't know if it's viable or not. First, what does the resistance rating of a pot refer to, the highest resistance point? Second, I wouldn't even know how to wire up a single pot as RLED... would I run a single supply voltage line, split it to two, connect to the inputs, then wire the LEDs to the outputs? wouldn't that count as resistors running in parallel and require some not-straightforward calculations? I'm looking to vary the RLED current between 5 and 12mA, ideally running all the way down to zero.
Also, I had a question regarding ground for this amp - some people have mentioned using the chassis as ground, but then some people mentioned not using the chassis as a "conductor". does this mean to connect ground to the chassis, but not directly (i.e. run all grounds to, say, a copper plate, then connect the plate to the case)? What about, say, for the pot or RCA jacks, where the ground tab will probably touch the metal case?
I have a lot more questions but since my last question post got ignored for the most part, I'll post them slowly this time...