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 TV valves
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 Return to top of page · Post #: 1 · Written at 11:32:32 PM on 20 September 2011.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1140

Hi there.
Just been reading posts about the trials and tribulations on getting these old sets working again.
I've spent many years collecting and testing valves. I have found many old TV valves have problems with shorts and low emission. Heater/cathode shorts are the most common problem
6GK5's and 6HG8's, like found in Sue's tuner, also have a high short count. With 6GK5's, 8 out of ten have mostly heater cathode shorts. 6HG8's are not too far behind. This may or may not be a problem depending on where and how the valve is used. Another nasty valve for faults is the locally made Miniwatt 6BL8.
Having a known good set of valves is helpful. The possession or use of a valve tester is even better.
I hope this is some use to all who like to play with old tellys.

Keep the Monochrome 625 Alive!

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