02-09-2019, 03:39 PM
I recapped that "mystery" section with very little change. Having all the caps replaced with high voltage I turned my attention to finding the problem between the antenna and video amp. I injected an audio signal at the volume control and the sound is loud and clear. I seem to have a "mystery" tuner as well. The 200 shows 3 tubes, and the 201 2 tubes. Neither quite right. Mine has 2 tubes, and only 1 match the schematic of the 201. I have a 6BQ7 instead of a 6CB6 (which tested ok), and a 6J6, which did NOT test ok. That explained the no pic no sound from the antenna. I had a 5J6, so I plugged it in for a test until I can get the right tube. The pic and sound came right in once I found the right channel. I do have sync issues with both the H and V. I also had problems with the injected video signal. I tested the sync sep and amp tubes. I have a 6BF6 (which looks just like a 6AV6) instead of a 6C4 and the correct 12AU7. It tested a little low on one side so I subbed it with a strong tube with no change. This section has been recapped, but I do still have some low voltage caps yet to go as well as power supply cans. B+ is still a little low. So, I have some caps on order.
This Sangamo cap has a nice big crack!
The contrast and sync isnt quite as good off the tuner as from video injection at the grid of the 1st video amp. Yeah, you can see my poor 5J6 glowing down there. Dont worry, it wont have to endure the abuse after this test.
This Sangamo cap has a nice big crack!
The contrast and sync isnt quite as good off the tuner as from video injection at the grid of the 1st video amp. Yeah, you can see my poor 5J6 glowing down there. Dont worry, it wont have to endure the abuse after this test.
If I could find the place called "Somewhere", I could find "Anything"
Tim
Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44