TRK12/120 Restoration

[baursam]

I'd LOVE to see some pics if at all possible!!

[dtvmcdonald]

There is not much more to show than what is already posted.
Look earlier in the thread.

You are not getting a photo of the current underside of the TV
power chassis! First, I forgot to take one before installing it
in the cabinet. Second, some people might puke if they saw it,
all those triples of modern Allen-Bradley style 2 watt carbon resistors
replacing the originals. I had to buy the type of resistors that
our EE department storeroom stocked since I wanted them
in a hurry. I could post a picture of the removed (and 30-50% high resistance) originals.

Its not ready for a frontal shot, running, as the knobs for
it were only put "in the mail" yesterday.
There is no back.

However, I should and will post a picture of the HV
connector I built for it. As I said, I have not run a lathe for
somewhere between 15 and 20 years [dedicated to the
memory of George Pisello who taught me], but it turned
out quite nice. There was lots of work with a boring bar.
I will also post a picture of the HV rectifier running in
the perforated sheet metal cage I made for it.

[dtvmcdonald]

As promised, two pictures. The HV box is self-explanatory.

You can see the old HV connector through the Plexiglas
of the connector I made to hook to the rubber cup type
modern one. There is an aluminum cylinder inside that
mimics the size of the connector on a 12AP4.
Note that the old wire was replaced by a modern red one.
The screw on the side prevents the old connector from
being pulled out, a safety hazard.

[tvdude1]

Originally Posted by Steve D.

This ad on the ETF classifieds page:
Reproduction TRK-12 rubber CRT masks, $100 a piece. Contact Barry Kasindorf, barry at barrykasindorf dot com 508-528- 0026.

Don't know if it is still current

-Steve D.

I know him well he still has some left.

[bkasindorf]

My ears were burning..Here are some pictures of the TRK-12 masks I have. I have 2 left.
-Barry

[dtvmcdonald]

The mask I have is now obviously the correct size.

Its just that I would have made it the same size as the
mask in the glass cover, with worse cut off corners.

[dtvmcdonald]

Photos in operation.

[Gregb]

Looks great!

Gregb

[MRX37]

That is impressive.

[Phil Nelson]

Zowie! What a project.

Phil Nelson

[Steve D.]

Very impressive. Nice job.

-Steve D.

[decojoe67]

That looks about as good as a 630TS! Great seeing these pre-wars working. It kills me when owners choose to leave them unrestored.

[dtvmcdonald]

Not quite as good as a 630TS or my 9T249.

Its not by design, however. The radar RT, and presumably also
the 12AP4, suffer from space charge blooming, or perhaps
its the lack of bypass caps on the CRT G2 and focus. At very low
brightness it really is very sharp. As I said, the IF frequency response
rivals the CT-100. Solid color areas have very obvious color
carrier in the picture. The tonal scale is nigh onto perfect.

[baursam]

Well done!! Thanks to posting the pics!!

[ceebee23]

now that my friends is a television!