kevin gilmore

soren also wanted buffers and a place for the attenuator on the board, which makes the board a fair bit bigger, and thus more expensive. if people think that is a good idea, or have other ideas i am certainly willing to modify. But i think that the smaller board is a better idea

Don't remember if there is a 100 ohm input series resistor on that board. the ss design need lowish input resistors because of the offset currents in the that 340 and the gain resistor is calculated from there

well if you are craig, you wire a 2 gang pot as parallel shunt with 2 resistors because that is moar better. unlikely this was wired that way. also requires a reverse log pot.

if you are going to get a tube amp, get a tube amp. if you are going to get a solid state amp, then get that. but a pair of tubes driven in parallel by a crappy opamp, with lots of feedback and garbage transformers modified to do both 32 ohms and high voltage at the same time seems like a really bad idea.

the mjf are plastic parts, so you can use metal screws, you still need a thermal isolator the mje parts are exposed tab, so you need to use insulators on the screws

soren wanted this, work in progress

need to listen a lot more. but in general very similar sound signatures

got them, the connectors are pieces of crap, one side is intermittent if you shake your head hard, but sound wise pretty comparable to my lcd2 may actually be built a bit better

looks like 20 bit plus 7 segment supposed to be sign/magnitude but not sure of that

i will take a set of input boards please

2n5564 is the original part, however they are going to be very hard to find

for 15V, have to recalculate the values of the 1M resistors. So one of them would need to be 473k

the pair of 1.5k resistors and the 10 volt reference make a 20V output voltage the pair of 1M resistors and the 100k pot are for trimming the output voltage and are optional not sure where the 750 ohm came from

kerry, any chance of a grhv supply that size

a neon test light works better

I don't believe that Mikhail ever sold it. At the time he said it was about $6k to gold plate it. And I don't believe that, probably more like $1k. He did try and sell it a couple of times for $35k or so I was told.

the board is the dual servo one, I thought I published the final schematic, will have to look

That schematic does not match the current board

yep those 2 caps go from +vcc to -vcc not sure why

as far as I know you have to gold plate the turd. then you can polish the shit out of it.

those have not been updated in a while, so many versions, sorenb probably knows more about which is which than i do at this point

is it anything like the final countdown?

found an error with the input board, fixed and updated

2x is just fine for this

i'm sure they can make a high quality amp. But they are subject to the same parts i use unless they find piles of obsolete parts. Kind of doubt they would do that at this point