Quote:
Originally Posted by Chris K
So my RF generator is set at 21.25MHz. The grid on the 1st audio tube, 6AT6, is pin 1. Do I need to ground the black generator output lead or just touch pin 1 of the 6AT6 with the red lead from the Knight? Sorry for the very basic questions here but this is virgin soil for me!
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this set is very close to my FADA 895, which is a RCA630TS clone.
the 6AT6 is the 1st audio level amp, it also serves as a bias clamper ( diode ) as this set is pre-AGC and has a " picture control" like my FADA,
like someone mentioned above to test the audio out section, you can simply clip on to the center wiper of the volume control, and feed in any sine wave in the audible range, to test it. this will also insure that you are on the isolated side of the grid via the .01 cap , no risk of loading loading thing down hooking up to that point.