Quote:
Originally Posted by Kevin Kuehn
Howdy, and welcome.
I added the below blanking circuit to my 20A1 chassis about 15 years ago. Only one capacitor and a resistor, it really works well on my set. This is right out of Milton S. Kiver's-Television and F-M Receiver Servicing (great book by the way). The circuit shown is almost identical to your set. Hopefully you can see it well enough here, otherwise pm me and I can email a full size scan.
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Nice to see that circuit in Kiver. I've been installing that kind of circuit in many of the TVs I restore lately to tame the retrace line problem. Each set is a little different, so you have to experiment a little to find out what works best. A few sets don't lend themselves to this kind of fix -- the available blanking signal with the right polarity and amplitude can't be found.
My copy of Kiver is the 1948 edition, which does not seem to have the figure you show.