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#1
11-05-2020, 07:02 PM
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Questions on 1956 COLOR Raytheon C-21C1-M Television
Hello, I'm new here so I'll introduce myself. My name is Matthew Clark I'm 19 years old and I've been interested in vintage electronics since I was around 7 years old. The other day there was this Raytheon television on Facebook and I ended up getting it. I hear it's one of two still surviving. With the cabinet I'd like to use Restorer Finish to help hide some of the bad spots. Yesterday I carefully with two screwdrivers took the CRT socket off and tested it. The emissions are fantastic and the cut off is good. When the voltage is reduced to 4.5 volts it still tests good, but there might be an issue. At 6 volts no short, but at 6.3 volts the left shorts light is flashing(Not solid indicating a hard short). The exact same thing happens on a 1968 Zenith color set. With the Zenith I have a decent picture still despite the blinking short light. There's a couple links below of both sets. So my question is, could there be a problem with my tester or is the short so minimal that it will not make the CRT unusable? And can the heater voltage be slightly reduced in the set so it doesn't short if it's actually a short? And should I buy or borrow a known good crt tester. I'm in Kankakee County IL if anyone near me has a good CRT tester they'd let me use let me know. Thanks
LINKS:https://flic.kr/s/aHsmRXbcgr Video of Zenith playing with possible short. https://www.youtube.com/watch?v=blfC...l=MatthewClark Last edited by TQGIBTNGO; 11-06-2020 at 09:23 PM. 
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#2
11-05-2020, 09:54 PM
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Welcome to the forum!
As far as your tester and the sets. Things get old and don't work as they sometimes should. Since you are getting the same symptom on both of the CRTs. I would suspect the tester is showing its age. If the CRT doesn't snap, crackle or pop, press on. You have a found a wealth of information here. Don't be shy in asking. And have fun. Phil Last edited by reeferman; 11-05-2020 at 09:57 PM.
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#3
11-06-2020, 09:38 AM
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I would agree with what reeferman is saying, most likely you have a tester issue. If you believe it gave accurate readings for the Zenith, I would run with the assumption that you have a good CRT and disregard the short light. Someone from Chicago may be able to help you with another tester.
This is the Early Television Museum’s database of surviving sets, yours is now the third of that model. Contact them and they will add yours. https://www.earlytelevision.org/color_database.html Congrats on the find.
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#4
11-06-2020, 09:45 AM
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Have you looked inside your tester to see if there are any paper capacitors associated with the shorts test? if so, replace them. check to see if the resistors associated with the shorts test havent drifted WAY out of spec. that can all affect sensitivity of the shorts tests. also make sure the correct neon bulbs are installed for the shorts test
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#5
11-06-2020, 10:22 AM
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Just a word of caution: Don't run the raytheon any more than you need to, until the paper wax capacitors have been replaced. You have a stupidly rare set. (I mean, they really don't get much rarer than this thing!). There's parts in there that simply can not be replaced if they fail. This set, in working contision, would be quite the sight.
(Guys - RCA's 'simplified' color chassis, based on the CTC 4?) If the CRT is good, all the better. It deserves being cared for. Not many were sold. Also, the CRT is metal, and the HV is 25kv. You don't want to get bit by it...
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#7
11-06-2020, 11:45 AM
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#8
11-06-2020, 11:49 AM
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I have a B&K 466 tester that I'm very familiar using to test 21AXP22s (I have an example of every chassis RCA made that uses that CRT as well as Philco and Motorola sets that use it).
Would you be interested in selling or trading that set?
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#9
11-06-2020, 11:53 AM
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#10
11-06-2020, 11:55 AM
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 Oh, come on, WHY NOT!?  It's always lots of fun to get zapped by HV anode voltage, if I had $20 for each time it has happened to me, I would be able to pay off a good part of my house by now! 
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#11
11-06-2020, 11:59 AM
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#12
11-06-2020, 12:10 PM
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 https://www.youtube.com/watch?v=Rb6v...nnel=shango066Love his content
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#13
11-06-2020, 12:17 PM
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#14
11-06-2020, 12:28 PM
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If you change your mind or want to haggle for more, you know where to find me.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#15
11-06-2020, 08:45 PM
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Welcome to the forum Matthew and congratulations on preserving this uncommon set. I see yours is mahogany, as is the one that I have. I understand that the other known one is blonde. It is fantastic that the CRT in yours seems to be good. I agree with the other responders that the testing issue is probably with the tester.
You mentioned 1958 but it is actually a 1956 set. There was a write up on it in the January, 1956 issue of Service Magazine beginning on page 13. The magazine is available here: https://worldradiohistory.com/Archiv...ce-1956-01.pdf Thanks for posting your find and please keep us abreast of your progress and feel free to ask any questions. Although my set has a good CRT, it is presently unrestored.
__________________
Tim
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