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  #31  
Old 06-26-2006, 09:37 PM
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old_tv_nut old_tv_nut is offline
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Hmm? 'xplain some more about AM vs. FM??
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  #32  
Old 06-26-2006, 10:12 PM
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Lemme see...

the function and "reverse" implementation possibilities:

CW vs Pulse
Pulse vs Pulse
function vs latching relay+function
function vs function+On-Off
AM vs FM

and only a 2N408 in the remote.
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  #33  
Old 06-26-2006, 10:33 PM
Bill R Bill R is offline
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Like I said I never had to repair one. So I was just basing am vs fm on the fact that only reverse function has a diode detector and the other functions do not. I never had to repair one so I am not really sure. Maybe someone can post a schematic. I would if my scanner and I were on speaking terms. Dad burn computers!

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  #34  
Old 06-26-2006, 10:45 PM
Bobby Brady Bobby Brady is offline
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I like the multi-motor design but this system you guys are describing is amazing to me and something I would enjoy restoring. I guess everybody here would! I am very impressed that it has a transistor. That remote hand unit looks very cool in design. I guess the clear buttons do not light up but they are impressive.
I love the technology of the '50's!
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  #35  
Old 06-26-2006, 11:11 PM
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David Roper David Roper is offline
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Quote:
something I would enjoy restoring.
I can understand taking great joy in the restoration of one of these [past tense]. Restoring one [present tense]? That would probably be a major pain in the fritter.
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  #36  
Old 06-27-2006, 06:09 AM
Bobby Brady Bobby Brady is offline
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I like pains in the fritter!
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  #37  
Old 06-28-2006, 10:11 PM
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I talked to someone at Zenith who said they had a multi-function ultrasonic remote at one time that changed the function of a couple of the buttons to "TINT" when the sound was muted. Doesn't exactly apply here, because this one has no mute function, and has separate buttons for everything.
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  #38  
Old 06-28-2006, 11:45 PM
3Guncolor 3Guncolor is offline
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Zenith did have the SC600 system. It worked different by using the mute function. When the set was in mute it would switch the relays for channel up and down to drive a motor on the tint control. Unmuting the set would return normal operation to the channel up, down. Most poeple did not use it in fact I remember taking out the switch for a few customers that would keep forgetting about it and mess up their color.
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  #39  
Old 07-04-2006, 10:06 AM
jstout66 jstout66 is offline
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Well.... I went to my friends house finally to look at his Worthington (CTC-7A, 1958 code dates stamped on the tubes) and see what kind of condition it was in. This one I can't figure out and is wayyyyyy beyond my repair abilities. The set does fire up with a picture and sound, but I can't get any of the funtions to work. On this set there are NO knobs for fine-tuning or changing the channel etc...... So I am unable to adjust anything to see what type of picture I'd get. You can hear relay clicks when hitting the buttons but NO motors kick in to do anything. I emailed a person I know who has one and hopefully he might be able to look at it. Has anyone worked on one of these systems?
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  #40  
Old 07-04-2006, 11:01 AM
Bobby Brady Bobby Brady is offline
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Wow, I can almost imagine being there! I think you are so lucky!
Based on what has been written in this thread by the topdogs here I would bet it is some bad connection keeping the control motor from getting power. Hearing that click probably says power is being sent. Or maybe the motor shaft is stuck from dry bearing grease and needs small fingers to spin it free.

Last edited by Bobby Brady; 07-04-2006 at 11:04 AM.
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  #41  
Old 07-04-2006, 11:04 AM
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Pete Deksnis Pete Deksnis is offline
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Interesting restoration path...

Quote:
Originally Posted by jstout66
The set does fire up with a picture and sound.... You can hear relay clicks when hitting the buttons but NO motors kick in to do anything.
Sounds as though the electronics are in amazingly good shape. But your friend may need an electrician for the motor drive stuff...!
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  #42  
Old 07-04-2006, 11:38 AM
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Chad Hauris Chad Hauris is offline
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Just like in jukeboxes and other old equipment with a lot of automated mechanisms
a big problem is likely gummed up grease in the mechanisms.
These early RCA's I believe used a single motor and then a clutch system to apply the motive power to the appropriate control function...cleaning and relubricating this mechanism is sure to help.
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