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Poor poor little National HRO Senior L76
#53

The backwards RF gain control is bugging  me so out it came and install a nice new 10K linear taper Allen Bradly pot in its place. Now it works in the proper direction but all the gain is at the last 1/4 " of travel. The one that was in there did the same thing. GRRRRR. It's wired as a rheostat(just the wiper and one end are used) so I could just replace it with a smaller value and that would correct the problem. But that is tooo easy. I want to find out why it doesn't work with the stated value. I like headaches!! Maybe the original (that I don't have)has an odd taper that has very little resistance is at the far end. I will have to ask 7C and see what he sez!!!

Terry


Messages In This Thread
OT RCA 6T71 1950 TV - by Radioroslyn - 06-13-2015, 09:19 PM
RE: Poor poor little National HRO Senior L76 - by Radioroslyn - 07-31-2015, 05:38 PM



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