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 Post subject: Replace this tube socket?
PostPosted: Jan Thu 27, 2011 1:23 am 
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Joined: Mar Mon 01, 2010 5:33 am
Posts: 13
Location: Andover Kansas
Hey everyone.

I'm currently doing some 'work' on a 1955 Zenith television.

I know everybody told me not to but just like a bad kid, I did it anyway.

I was inspecting the underchassis for broken connections, etc. and discovered that the tube socket for the 3rd video IF is cracked and bits are falling off.

Now my instincts say YES to replace it, but I was wondering if this is a wise decision.

I'm also curious to know what symptoms this bad socket would produce as I'm having mediocre and differing results after the re-cap. I'll delve into that later if anyone gets curious.

Thanks!

Tim


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 Post subject:
PostPosted: Jan Thu 27, 2011 2:15 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 18934
Location: Albuquerque, NM 87123
If sync is taken off before the 3rd video IF (likely), then you should have good vertical and horizontal, but you might get only a lit screen (no video) or poor contrast video.
I would replace the socket if it's falling apart, no matter what circuit it's in.


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 Post subject:
PostPosted: Jan Thu 27, 2011 3:58 am 
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Joined: Jun Fri 19, 2009 6:34 pm
Posts: 9345
Location: Long Island NY
I also recommend changing it. You could end up with a burned-up coil or other damage if one of the terminals wiggles around and hits the chassis. Just try to make sure the components and leads go back in the same positions they were in originally to avoid disturbing the circuit capacitances too much.

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"Hell, there are no rules here--we're trying to accomplish something!"

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 Post subject:
PostPosted: Jan Thu 27, 2011 8:03 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3431
Location: Olympia WA USA
Definately replace the socket.

The socket falling apart was a real problem in the 70's with either Magnavox or Sylvania sets. It was int he IF strip and could cause many varied problems.

One set I worked on had all the sockets crumbling in the IF stages. At least they were PC type and EZ to replace.

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FrankB
WB7ELC
"The average family has 2.5 children. Where is the other .5 child?"


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 Post subject:
PostPosted: Jan Thu 27, 2011 9:42 pm 
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Joined: Jun Thu 17, 2010 5:41 pm
Posts: 1617
Location: Dawson Creek BC, Canada
If it's falling apart then replace it.The trouble that you'll have to go to is nothing compaired to what it could do.

Nick

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Nick
Life without music would be a mistake-Nietzsche
I am not accountable for any damage this causes


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