http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3638&item=6139322524

Saw this while searching for a tv for myself. Normaly I don't post ebay stuff but nobody has touched this thing and the 100 is such a rare set I'm sure somebody needs or wants this tuner.

That should be CT-100 , (or CTC-2,) NOT CTC 100(which would be about a 1979 or 1980 model tv.!!(and nearly worthless!!(I'm not sure there IS a ctc-100).

This vintage 50's tuner is stamped KRK-12. The CT-100 used the KRK-12C tuner. They are similar. The "C" may indicate use in the color chassis. I'm not sure of the exact difference. The high end RCA b&w sets used the KRK series tuners in 1954.


Steve

Oh ok I didn't know it wasn't the right one, the seller represented it as such and I'm no expert :)

That should be CT-100 , (or CTC-2,) NOT CTC 100(which would be about a 1979 or 1980 model tv.!!(and nearly worthless!!(I'm not sure there IS a ctc-100).

I worked for the old RCA Smirnoff Lab back then (1981). On TV. We had CTC99 and a CTC101, but IIRC no CTC100. The CTC101 was the first RCA TV with a line comb filter, and a flyback that was unreliable. Seems that RCA used a design with the high voltage secondary split into six segments, and rectifier diodes between pairs of segments. Later they used 6 diodes, one between each segment. Seems the AC field around the diodes in the 3 diode design was too high, causing breakdowns. The flyback would die, and take out the horiz output transistor with it.

I need that knob. Somebody's gonna have to bid pretty damn high to get it ;)

Looks like he wants it pretty badly :para:

Was that the only set that used this knob? I could look through what I have (I just added a bunch to my knob stash) but the chances of a genuine CT-100 being scrapped by one of the repairman who gave me these is pretty slim.

The outer knob I have, what I need is the channel number inset. Watch and see, the final price on this thing will leave many saying :wtf:

Tim,

I realy don't think that's the CT-100 tuner or knobs. I don't see the channel insert in the picture or the brass circle in the center of the CT-100 channel insert. It may be from the 21CT55 CTC-2B model or as I said in an earlier post, it may be off one of RCA's b&w models.

Steve

The CTC-2 chassis is what's used in the CT-100, the CTC-1 chassis is rumored to exist as a test rig as memory recalls. The KRK-12 is definitely a CT-100 tuner, assuming that's what it is. If you look carefully inside, you can see what I believe is the channel insert, which is really the part I need, the rest is useless to me.

I'm gonna look over my CT chassis well when I get home to confirm.

Well I'm really bent about this :gigglemad
I sold one of these kits a couple years ago, new in the box and didn't get near this much and it's still got 3+ days to go!

I could care less about the tuner, it's the center channel indicator knob I'm bidding on. I bought the last one on eBay that sold for just about as much as my current bid.

Just in case anyone is interested, the KRK-12 tuner was used on the black and white sets as Steve D. stated and were the 12A and 12B. The first use of the KRK-12 on a color set was in RCA's prototype Model 4. It was then used on the Model5, CT-100 and the 21-CT-55. Sorry Kam, this info still doesn't get you that channel insert!

Steve

The one I sold had the knob but it was not exactly the same as a CT-100, the center had different markings. Looks like the one on eBay is the same way. It would still function fine tho.

P.S. I wasn't really bent, that was just supposed to be me trying to be humorous :stupid: