Silvertone 8106

[Doug66]

I think I have fixed the audio. I started checking voltages, which were way off on the 5AQ5 audio output. R44, 560 ohm 1W going to pin 6 was open. Didn't have a new one, but I tacked in 2 units in series to give me around 570. Sound is much better but not perfect. I think when I get that new coil in, the sound will improve as I adjust it.

[Doug66]

My L15 sound take off coil arrived today, and I have a couple of questions before I install it. The Miller replacement coil 1471-a has a resistor soldered across two lugs and also has two 4.7 caps.

The guy at Moyers, where I bought the coil, emailed me and said that his book said to delete them if my old coil doesn't use them. Therefore I will take out that resistor. However, the old coil uses two 33pf caps which I replaced. Should I keep the 4.7pf caps in the new coil or change them to the 33pf caps?

[Doug66]

After I panicked last night, I sat down an reread the instructions and figured it out, but thanks for the help.

Now I have a new issue. I've got the new yoke installed and did a power up. I have no Hi voltage. Checking voltages on the 6CG7 gives good readings on both plates, pin 6 and 1. I don't have any negative voltages on pins 2, 7, 8.
High voltages probe shows nothing on CRT anode, plate of 12AV5, or pin e of Damper.

[Giulio Maiocco]

Good afternoon Doug,

You are missing your negative voltages because the horizontal oscillator is not working, also, your High voltage is missing because of this!
As a quick check, please control the continuity of the 50 Ohm part of coil L22 and that you obtain about 490Kohm between 6CG7's pin 2 and ground. If these 2 tests do not point to a "smoking gun", I'll suggest you some other tests to perform to help straight out your problem.

I really doubt it is the 6CG7 itself, as it is a reliable tube, but did you try a spare tube?

Cheers

Giulio

[Doug66]

Hey, the tests were way off, so I replaced C47. Still nothing, so I tried another 6CG7 tube. That brought everything back including HV. Didin't think it would be as simple as a tube!

Thanks for the help.
Doug

[Doug66]

When I got this set, the original yoke cover had disintegrated leaving a black powder over the chassis. Also missing was the width sleeve. I found another width sleeve, and I know I need an insulator like fish paper between the sleeve and the yoke.

I just got some fish paper. Do cut the paper the size of the width sleeve and glue them together, or do I encircle the yoke completely with the fish paper?
Thanks

[Doug66]

Ok, I've finally got the yoke working right with the width sleeve and yoke cover. However I still have unstable horizontal which has plagued me from the start. I turned the set on tonight for about 30 min, and a new problem arose. The sound became distorted, and a hum bar appeared which started at the bottom of the screen them moved towards the top then started again at the bottom. Tried new tuner tubes, but that had no effect.

here are two pics.