GAROD TELVISION Project

[Tim]

That is not a Tele-Zoom model, but still pretty unique with the slide rule dial.

[EdKozk2]

I',m in the middle of recapping and found a .05mfd paper cap wrapped in foil.
The foil is grounded. The capacitor is connected between the cathode and
screen grid of the 6BG6 horizntal output tube.
Anyone ever see one of these in a circuit before ? Is the foil a shield from the
high voltage, 10kv 500mmf filter cap ?
This set is a 1244G model for sure. It's in the Riders 3-8 Garod. I have found a wiring error on the schematic for the secondary of the vertical output / yoke connections. The yoke should be grounded, not connected to the 360 volt B+ line. Caught this error comparing Sam's 1244T schematic, folder 93A-7 to the Riders 1244G's.
Ed

[Phil Nelson]

Originally Posted by EdKozk2

a .05mfd paper cap wrapped in foil. The foil is grounded.

You run across these shielded caps in old radios once in a while, although I haven't seen one in a TV before. The usual approach is to replace it with an ordinary modern cap and then evaluate how the set works. I believe most people find it's not necessary to replicate the foil shield.

If you want to shield your new cap, you can get copper foil at a hobby store. Or you might be able to salvage your old foil and reuse that.

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

[EdKozk2]

Originally Posted by Phil Nelson

You run across these shielded caps in old radios once in a while, although I haven't seen one in a TV before. The usual approach is to replace it with an ordinary modern cap and then evaluate how the set works. I believe most people find it's not necessary to replicate the foil shield.

If you want to shield your new cap, you can get copper foil at a hobby store. Or you might be able to salvage your old foil and reuse that.

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

Phil,
I remember seeing a few foil wrapped caps in few radio's I fixed years ago too.
I'm finding that over half the resistors in this Garod 12444G are 50 to 100 percent out of tolerance. I've been replacing them as I progress.
Ed