'74 19" RCA CTC63 XL-color

[Findm-Keepm]

Originally Posted by JCFitz

Changed value resistors are very common on those RCAs and even the mylar caps fail sometimes. I always had a ton of vertical and horizontal problems.

Ah, yes, the infamous 180K and 220K resistors that would jump up in value = crappy sync/vertical shrink after warmup. We kept a good stock of those. You can even see some of the resistors in the pic, alongside the Vertical tube.


Cheers,

[jr_tech]

Looking at this set, the design is very similar to the earlier CTC22 (1968 or so). The first Photofact that I find for a CTC 63 dates to 1972. It seems that RCA went through a lot of chassis numbers in a very short time (40+ in 4 years)....can anybody sketch in a little history here? Perhaps the transition to solid state was "one transistor at a time" ?
just curious,
jr

[radiotvnut]

Wasn't the CTC25 from '66-'67 the first color chassis that had a solid state audio output stage? Then the CTC38 from the late '60's had a solid state IF section as well as the slightly updated CTC39 which was made through '74. The CTC40 was the first mass produced solid state RCA color chassis from '69-'70. There was also the "2000" model that used, IIRC, a CTC47 chassis. Then, the CTC44 came out in '70-'71, which was similar to the CTC40 except the '44 used a tripler instead of a HV rectifier tube. I think the CTC44 and the CTC47 (2000 set) were similar as far as the basic chassis goes. I think the first modular upright XL100 chassis was the CTC46 from late '71-early '72. There were a couple of solid state modular 19" sets from the early '70's that used the CTC49 and CTC59 chassis. I saw one of these early SS 19" sets that still carried the "trans-vista" badge (pre-XL100). There were several versions of the 25" XL100 upright modular chassis in the CTC46, 48, 58, 68, and 78 series that were made from around '71-'77. The CTC68 seems to be the most common 25" XL100 chassis and was used from roughly '73-'76. The CTC71 chassis was the most common 19" XL100 chassis from the mid '70's and is one I'd like to find again as those sets had a very sharp picture. The CTC74 (19") and CTC81 (25") came out in '76 and were used in the first colortrak sets. Starting in '77, RCA phased out the upright style modular chassis and replaced it with an inferior horizontal modular chassis that were in the CTC8x and CTC9x series. The very last modular chassis / delta gun CRT RCA sets were made in 1980. After that, all RCA chassis were single board designs with inline CRT's. Speaking of inline CRT's, RCA actually made some 15V, 17V, and 19V sets dating back to the early '70's that used an inline CRT. So, that's what I've picked up over the years regarding RCA TV's. And, yes, it's very confusing.

[jr_tech]

Originally Posted by radiotvnut

So, that's what I've picked up over the years regarding RCA TV's. And, yes, it's very confusing.

Indeed ! quite confusing... Thanks for the "RCA Secret Decoder Ring".
looking through the Photofact index, it appears that they skipped a few numbers between 22 and 63 as well. CTCs 23,26,29,32,33,34,37,45,57 and 61 seem to be missing... strange
jr

[andy]

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[Findm-Keepm]

CTC72 was a small screen XL100 chassis too (MA_ series modules), with a bonded yoke CRT. It was the very first XL100 I ever junked as a kid - HV went through the roof and cleanly circumsised the neck of the CRT.

Cheers,

[AUdubon5425]

From my '74 RCA product manual:

New for '74:
CTC-62A: 15" & 17" XL100
CTC-58A: S-Line console, replaced CTC-48
CTC-64/68A/68H: 25" console, XL100
CTC-66: hybrid 19"
CTC-71: 19", replaced CTC-60

Continued from '73:
CTC-39: 25" S-Line console
CTC-51/51X: 15" S-Line
CTC-52X: 17" S-Line
CTC-53/53X: 18"
CTC-63X: hybrid 19" S-Line

[1993ctc175]

Hey Folks!!

I just got out my Service Manual for RCA CTC63 The book have dated back in 1972. It only covers both CTC63XE and CTC63XF so, here are the pictures