I did find this old thread, however.
https://www.videokarma.org/showthread.php?t=275826
The bk 440 and 490b are not quite the same, close, but the 490b was the last and latest they made.
And I'm not sure which way you ended up having it hooked up when you tested, timmy, you say you used a 15v source on K & G1?
can you give more detail on how its hooked to the tester plz?
Tks.
