No sync on RCA KCA118A 17" B&W portable.

[farmradio]

Hello, & thank you. The part itself says CRC in a diamond logo, as the mfg., then RCA then 972182-3. Not sure who the OEM for this was.

[tom.j.fla]

Robert, RCA KCS118a is in Riders Book 24 section 10, PDF pages 436 to 447 schematics for the 118 A,B and 118 C,D are there with all voltages and waveforms included. The info there is correct. All the best,Tom.J

[Electronic M]

Originally Posted by farmradio

It also appears that K1, & K3's description is reversed in the SAMS, because the one labeled K3 (sync coupling) has no pF capacitors, & that K1 (agc), with all resistors is not used in the 118A, & verified that by not being able to physically locate it on the board. So this has K3, (sync coupling), near the sync separator, labeled K1 in the SAMS, which in fact is most likely K3 2 pF capacitors, & 3 resistors. Help! I need an RCA original service document on this. This is nuts. After that Sentinel nightmare I just did, I've got discrepancies again in SAMS.

Get used to Sam's being FULL of errors...At least you probably have not had the damnit I can't undo what this piece of paper had me do moment....I've had that moment twice. Once I adjusted the wrong slug on a remote reciever cause sam's had the ones for the two channels reversed in their layout. The other time I did not know how to read the bumblebee capsand changed according to the schematic. I moved and lost the originals, and come to find the schematic and parts list are different by a factor of 10, and the vert circuit they were in was off freq....I had to redesign the resistors to make it work since I did not have the other cap value on hand, and did not have any dough.

[dieseljeep]

Originally Posted by farmradio

Hello, & thank you. The part itself says CRC in a diamond logo, as the mfg., then RCA then 972182-3. Not sure who the OEM for this was.

The logo is actually CRL, which meant Central Radio Labs, but known as Centralab. They were the early originators of the PEC, packaged electronic components. They were rather reliable, except the ones that had transistors as part the component makeup.
They were located on the northeast side of Milwaukee since the 20's, making radio parts.

[Findm-Keepm]

Originally Posted by dieseljeep

I used to be a hastle looking up part numbers for RCA and GE, as they used drawing numbers on the part. You had to go to the distributor with the model or chassis number and look up the part in the factory manual or even the Sams. Zenith, Motorola and most others used the original part number, so it was a bit easier.
Back in 1974, those parts were probably special order.

For RCA, I've got the 1974, 1979 and 1984 price guides, and a 1976 Drawing number to part number cross. I also have the Parts software to look up CTC175 - 2008 parts, and I also have several 1964-1972 RCA knob guides, and the ubiquitous Module to chassis and RCA IHVT to chassis lists. I also have a original part number to RCA part number - helpful with VCR parts, as Panasonic and Hitachi made RCA VCRs, and had the weird EQB0048RTA or so part numbers...

I've seen boxed, new RCA parts with drawing numbers not listed in the Drawing-to-part number guide. RCA issued "blue sheets" to distributors to correct/add info, but sadly, I don't have any of those.

GE also used a drawing number (early were the M128XXXXX style, and the later were 23c/73C-prefixed stuff, out of Portsmouth.) I can cross those as well, and have a couple GE price guides - 1/3 the thickness of RCA's, thanks to RCA's inclusion of their Communication Parts. Later, the two were merged - some GE part numbers went away completely, superseded by RCA parts.

RCA used the drawing number system as it was intended - the drawing number corresponded to the design drawing, on file at RCA. Even in 1983, you could call Camden for a lookup on a 50's part and they'd tell you the closest RCA part or subsequent RCA part suggested for obsolete stuff. This was the problem mostly with cabinet parts and knobs, but we called once on a detent tuner. RCA's response was a tuner with a multi-sized shaft - cut off what you don't need, and it included a guide to cut it to fit several obsolete tuner profiles. With one, you had to sub other knobs, as the indexing was different from the original.

On the other side, I have TV parts where neither the drawing number or part number appear in any RCA guides - clueless as to their application. They came from RCA when the bosses' daughter did some creative ordering to win a trip from RCA - a trip down the Nile. We swam in triplers, modules and Nipper crap for a few months after that. RCA sold us a bunch of no-demand parts too....probably for the Mural hotel-Motel sets...