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#16
06-23-2014, 11:21 AM
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Quote:
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Just look at those channels whiz on by. - Fred Sanford 
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#17
06-27-2014, 12:30 PM
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I just picked up a mid-60's RCA New Vista b&W console, that works, and has a bright shut-off dot when turned off. Is that normal for one of these sets? I'll post a thread about it when I get around to taking some pics, still need to haul it in from the garage. Its MINT!
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#18
06-27-2014, 01:12 PM
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The condition may be normal (many older b&w TVs do this), but it can damage the CRT. The dot can burn a hole in the phosphors of the tube if left on the screen any length of time. (The same thing will happen if the vertical sweep fails and the resulting horizontal white line remains on the screen.) I would suggest turning the brightness control up slightly just before shutting the set off.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. Last edited by Jeffhs; 06-27-2014 at 01:19 PM.
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#19
06-27-2014, 03:10 PM
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One time when CRT tv sets were plentiful at the curb, I took home a 1987 Zenith 13" color tv which was made in Mexico. It was probably the cheapest model they offered in a color set at that time.
Anyway the picture was quite good with a healthy tube. Being that I had many more interesting tv sets, I decided I was going to modify the tv to become one of those 'oscilloscopes' which I would feed off of a stereo amplifer (to make patterns in time with the music). I did a nice job of it, with toggle switches for each gun color and switchable horizontal only or vertical only response. But, when the music stopped once I wasn't in the room, and the dot burnt a hole clean through the phosphor. I couldn't believe it had the intensity to do so in a short amount of time. (This was with the toggle switches all on, for a BRIGHT white dot in center). Stupid project
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