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  #31  
Old 02-01-2017, 08:40 AM
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Found the problem! The wall wart from my AM transmitter was right behind the tuner, and it was causing interference. Unlugged it, perfect picture on both sets.
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  #32  
Old 02-01-2017, 09:20 AM
dieseljeep dieseljeep is offline
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Found the problem! The wall wart from my AM transmitter was right behind the tuner, and it was causing interference. Unlugged it, perfect picture on both sets.
The Digital Stream DTV converters have the AC cord passed through a ferrite bead or sleeve to minimize the SMD noise.
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  #33  
Old 02-01-2017, 09:27 AM
JB5pro JB5pro is offline
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I was replaced the channel indicator drum on the same set

You know the tuner knob is wrong on yours.
The one i serviced had a warped channel drum keeping tuner from turning. I got one from zenith.
So, i always wondered if it was a bad design or more likely a well intended tech put wrong bulb that was too hot?
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  #34  
Old 02-05-2017, 08:50 PM
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Just checked the HV on this TV, and I could not believe it when my meter read 36 KV. Adjusted the HV as low as it would go, and got it down to 29 KV. Probably one one those durned varistors.
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  #35  
Old 02-06-2017, 08:59 AM
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Just checked the HV on this TV, and I could not believe it when my meter read 36 KV. Adjusted the HV as low as it would go, and got it down to 29 KV. Probably one one those durned varistors.
You're lucky you have a CRT yet.
I had a 1967 Zenith lose HV regulation. The arcing broke the CRT neck off its 25GP22.
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  #36  
Old 02-06-2017, 09:09 AM
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I'd check the tube and all components in the HV reg circuit....I thought the varistor problem normally resulted in low HV, if it is going opposite of normal then you likely have other problems to address.
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  #37  
Old 02-06-2017, 10:15 AM
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Maybe I'll check the HV tubes when I get home. It wouldn't surprise me if they're bad.
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  #38  
Old 02-06-2017, 10:50 AM
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Maybe I'll check the HV tubes when I get home. It wouldn't surprise me if they're bad.
Also be sure it has the right damper/ regulator pair.
Check the tube chart. Some list several pairs.

73 Zeno
LFOD !
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  #39  
Old 02-06-2017, 11:50 AM
dieseljeep dieseljeep is offline
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Also be sure it has the right damper/ regulator pair.
Check the tube chart. Some list several pairs.

73 Zeno
LFOD !
The earlier chassis used a 6CJ3 and a 6HV5, heaters connected in series.
You had to use a GE or Zenith branded 6CJ3. There was a lot of Raytheon Japanese tubes designated 6CJ3/6DW4, that had a different heater current and wouldn't work in series with the 6HV5.
IIRC, the heater in the 6HV5 was receiving reduced heater voltage and wouldn't regulate properly.
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  #40  
Old 02-13-2017, 06:31 PM
JB5pro JB5pro is offline
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A 68'zenith is seen in bewitched episode

Utube... bewitched blow you a kiss in the wind.
Very cute perfornce by sarina, that devil woman.
Great bouce & hart song apparently written for the show.
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