I tried to skim through a few threads here and I have reached out to and heard back from J McShane.
Bryce resupplied me everything but the 7591 quad (most tubes included in purchase had issues).
Jim has nothing for me right now and also went on to discuss the trouble with the EH I am sure many here are well familiar with.
Since my 500B lacks the ability to adjust bias it was recommended I do:
"To use modern tubes the 500B needs:
1. Grid circuit resistance dropped from 330K to 200-220K, and
2. Either adjustable bias or bias circuit modifications to get a lower (more
negative) voltage to the tube grids"
But I am clueless. Is this a big job? Would I be better off just trying to find NOS 7591?
Friendly techs are welcome to PM me. I am willing to send this off if it can come back fully operational.
I refuse to allow my inability to work on gear keep me from owning stuff I want..... but I do not want it to become like a boat (a hole in the water you pour money in).
Right now I have a nice 500B with everything but the 7591 so it is somewhat worthless as receiver.
TIA,
D
Bryce resupplied me everything but the 7591 quad (most tubes included in purchase had issues).
Jim has nothing for me right now and also went on to discuss the trouble with the EH I am sure many here are well familiar with.
Since my 500B lacks the ability to adjust bias it was recommended I do:
"To use modern tubes the 500B needs:
1. Grid circuit resistance dropped from 330K to 200-220K, and
2. Either adjustable bias or bias circuit modifications to get a lower (more
negative) voltage to the tube grids"
But I am clueless. Is this a big job? Would I be better off just trying to find NOS 7591?
Friendly techs are welcome to PM me. I am willing to send this off if it can come back fully operational.
I refuse to allow my inability to work on gear keep me from owning stuff I want..... but I do not want it to become like a boat (a hole in the water you pour money in).
Right now I have a nice 500B with everything but the 7591 so it is somewhat worthless as receiver.
TIA,
D