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#1
02-05-2020, 07:21 PM
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Opinions on Radiation, er.. Air King TV
I found an Air King on line that I'm considering buying - it's a 16C2 compact mahogany console. I had the schematic in my pile and took a look at it.
https://www.flickr.com/photos/186808542@N07/ Very simple design but does have at least a power transformer. It also features a 16RP4 CRT. I'm looking to do a full resto on a consolette about this size. Are these any good? Is the 16RP4 a good tube? I'm looking for a solid performer and don't have a lot of experience with early 50s TVs. Any insight appreciated. John 
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#3
02-06-2020, 08:49 AM
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I've never owned one of those, but the schematic looks decent...It is no Zenith, but muntz and others were able to get decent picture on much simpler sets.
The advantage of simpler sets is that they are less work to fix. Hopefully the CRT is all glass. The metal cone tubes were prone to becoming gassy. Gassy tubes always have strong emission and weird cutoff... until the heater eventually burns open.
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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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#4
02-06-2020, 10:59 AM
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16RP4 is a first generation, non-aluminzed rectangular CRT with thick glass and flat sides. Not as quite as nice an image as an aluminized 16KP4 but certainly capable of producing a good image.
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#5
02-06-2020, 04:32 PM
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Quote:
  John Last edited by JohnCT; 02-06-2020 at 04:38 PM.
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#6
02-06-2020, 04:34 PM
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Quote:
Yeah, this looks like it uses the contrast control for an AGC control, or am I reading that wrong? John
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#9
02-07-2020, 07:59 AM
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#10
02-07-2020, 02:06 PM
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Quote:
https://i.imgur.com/U24fOKY.jpg  John Last edited by JohnCT; 02-07-2020 at 02:12 PM.
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#11
02-07-2020, 02:20 PM
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Quote:
Anyway, certain changes were made to televisions to eliminate the problem. I still have in my collection a HV rectifier tube that was shipped in new GE color table model televisions and retrofitted to earlier produced units that had a leaded rubber coating molded around the glass envelope. The damned tube feels like it weighs half a pound. Instructions that came with the tube new warned of handling the tube without gloves. Apparently, the Simpsons writer who wrote that episode must have been aware of that issue or perhaps discovered it researching early televisions for his script. John
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#12
02-09-2020, 01:41 PM
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It was the damper in early color sets that gave off most of the x-rays (relatively week, but still---x-rays) Fortunately, in most set designs, the radiation emitted went down through the bottom of the cabinet. You'd need to be a contortionist to get any significant exposure.
__________________
Ham shack...AM side: Knight-Kit T-60, RME-45 Vintage SSB side: National 200 Modern SSB: Kenwood TS-180S MFJ tuner, 130' dipole
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#14
02-09-2020, 02:35 PM
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I'm going to repeat an urban legend here (which means it may or may not be true).
I heard the x-ray problem was due to GE not wanting to pay RCA royalties for using the 6BK4 and came out with their own shunt regulator which generated the x-rays. The story goes that a woman had a cat that liked to sleep under the warm console TV when it was on. The cat started losing hair and the source of the problem was then discovered. I do know that GE replaced a lot of their first generation shunt regulator tubes as a part of a recall.
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#15
02-09-2020, 03:20 PM
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Quote:
jr
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