Admiral 20X11 restoration

[bandersen]

Originally Posted by Nuke

Bob - You have a nice clean chassis a couple of pictures back. How did you get it that way?

I got lucky this time - no rust! I just used a damp rag to clean the the top of the chassis, yoke, tubes etc. The underside was already nice and clean.

[bandersen]

I've been getting little shocks when my hand brushes against the CRT. I figured it was just static build up since the air is dry.
When I removed the CRT to replace the rock hard mounts, I discovered the CRT grounding wire was missing!
Here's one from another set. It's a short, curved piece of strong wire that hooks into the chassis and makes firm contact with the aquadag CRT coating.

I fabricated a replacement and no more shocks

With the CRT out I was able to scrape of the old mounts and clean up the chassis. Then I cut some new mounts from a sheet of neoprene and glued them down with GC rubber-to-metal glue.



I also popped out the tuner for some cleaning and replaced a few out of spec resistors. It's pretty cramped in there!


Then, I finished up the alignment. Here's the equipment I used.


Here are some post alignment screen shots.


I'm calling the electronics of this set done. Now on to cleaning up the cabinet.

[Reece]

Nice sharp picture. Another one for the showroom.

[cwmoser]

That Tuner looks exactly like the one in my 1949 era Emerson 639. Wonder if these tuners are the same and if they were simply common parts used by lots of manufacturers. I took my tuner apart and then lost one of the two wires that holds it together. I fabricated a wire. Later I found the one I lost and plan to some day replace it back.

Carl

Originally Posted by bandersen

...
I also popped out the tuner for some cleaning and replaced a few out of spec resistors. It's pretty cramped in there!


...

[Kevin Kuehn]

Lookin' good, Bob.

I'm pretty sure that's a Standard Coil turret tuner. I think Standard Coil was the name of an independent tuner manufacture.

[bandersen]

Thanks guys

Originally Posted by cwmoser

That Tuner looks exactly like the one in my 1949 era Emerson 639. Wonder if these tuners are the same and if they were simply common parts used by lots of manufacturers. I took my tuner apart and then lost one of the two wires that holds it together. I fabricated a wire. Later I found the one I lost and plan to some day replace it back.

Carl

No matter how careful I am, I keep losing bits and pieces too. I rarely find them later though

Here's a photo of my 639. It sure looks like the same tuner

Originally Posted by Kevin Kuehn

Lookin' good, Bob.

I'm pretty sure that's a Standard Coil turret tuner. I think Standard Coil was the name of an independent tuner manufacture.

Bingo! I was flipping through a copy of "Television Receiver Servicing" by Milton S. Kiver and found a couple pages describing this tuner in detail.

[Phil Nelson]

What is this?



Phil Nelson

P.S. Nice picture.

[bandersen]

Originally Posted by Phil Nelson

What is this?



Phil Nelson

P.S. Nice picture.

It's a Wavetek 1002 sweep generator (specs). It works great and was my main generator until I picked up a much newer Wavetek 1080 with the nifty VFD readouts.

[Electronic M]

Those big knobs remind me of some parts of the human anatomy. I wonder what was on the cabinet designers mind at the time that was thought up?......

[bandersen]

The larger knobs do make it easier to dial in a frequency.

Here's all the stuff pictured.

Wavetek 1080 sweep generator
Wavetek 1002 sweep generator

HP 54600B oscope

Heathkit IG-102 RF gen.
Leader 17A RF gen.

Kikusui 1120 frequency couter

RCA VoltOhmyst VTVM (off camera)

[Nuke]

Bob -

Is there a black cap hiding underneath that tuner? If so, what value is it?

[bandersen]

Originally Posted by Nuke

Bob -

Is there a black cap hiding underneath that tuner? If so, what value is it?

You mean the thing in the center of the photo where the drum is taken out ? That's a coil of wire encased in some black goo.

[old_coot88]

Originally Posted by bandersen

You mean the thing in the center of the photo where the drum is taken out ? That's a coil of wire encased in some black goo.

Possibly an RF choke on a B+ or heater feed through?

[bandersen]

Yes, I think that is the heater choke. The is also one on the B+ somewhere in there.

[wa2ise]

Originally Posted by Electronic M

Those big knobs remind me of some parts of the human anatomy. ...

That reminds me of a T shirt the girlfriend of one of the members of our college ham radio club had made up. Seems she thought that her ham boyfriend was not paying her enough attention, and that he was spending too much time on the ham radio. Working the transmitter knobs "Tune" and "Load"... So she wore this next time she met him ;-)