09-29-2015, 06:53 PM
Are you injecting your signal through a .1 uF cap? If not capacitively isolated, any DC on your Sig Gen lead could change the grid bias.
But don't ask me why the same thing doesn't happen at point "D". It's a mystery to me.
Everything I've found on line says that the 7C5 is an acceptable substitute for the 7B5 & the specs look similar enough.
But don't ask me why the same thing doesn't happen at point "D". It's a mystery to me.
Everything I've found on line says that the 7C5 is an acceptable substitute for the 7B5 & the specs look similar enough.
John Honeycutt
