Quote:
Originally Posted by vts1134
The diode reads 35k in one direction and 1.5k in the other.
There is no change in raster when I inject at pin 2 of the 12au7.
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OK, so what happens if you inject at the plate of the 1st video stage (pin1)? It should show the same pattern and same amplitude as at pin 7 (grid of output stage).
There's a coupling cap, C28, which goes from peaking coil L12 to pin 7. Could this cap possibly be misconnected?
The reverse reading on the diode seems a little wonky to me, though that's not germaine to the issue at hand. When you get the video stages working, it might be a good idea to replace the diode on general principles. A second opinion on that from resident mavens would be appreciated.
oc