Working on an Admiral 20X12

[Kevin Kuehn]

Originally Posted by Kamakiri

Not sure, but I could hear it, and the frequency did change with the vertical hold.

I guess Sams does show that some version had the V Osc. running off of B+. They show the alternative path with a dotted line.

Originally Posted by Kamakiri

Doorknob cap is fine, as is the 470 MOhm resistor on the 1X2 (Sams shows it to be a 1 Meg, but....anyway). Next, I'll clean the snot out of the tube pins and tube socket.

470 M, as in mega ohms? Or is that the really really ancient abbreviation for one thousand?

[Kamakiri]

470K. I typed it too fast

But hey! I gots a raster!!!!

I can barely get any sound at all on frequency and it looks like the IF's gonna need work, but this is a major leap forward, thanks to you guys!!!

Now, next question....source an Admiral replacement for that linearity coil, I assume?

[Kevin Kuehn]

Sweet!

I can cross that Lin coil to a Thordarson. But something tells me they were all pretty generic from the period.

[Kevin Kuehn]

Thordarson WC-14.

http://www.ebay.com/itm/Thordarson-W...IAAOSw8-tWZhH1

[old_coot88]

Hopefully the filter caps had enuff headroom for that sustained high B+.

[Kamakiri]

Originally Posted by old_coot88

Hopefully the filter caps had enuff headroom for that sustained high B+.

Just enough. I went 450 across the board....

[Kamakiri]

Originally Posted by Kevin Kuehn

Thordarson WC-14.

http://www.ebay.com/itm/Thordarson-W...IAAOSw8-tWZhH1

Mine! Thank youuuuuu!

[Kamakiri]

Well, the coil's in. Hm.

Very weak signal, very little contrast. In fact, I may have tweaked something in the wrong direction, as now when you turn up the contrast, the picture goes negative....