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Old 8th Nov 2019, 1:42 pm   #4
slidertogrid
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Join Date: Apr 2005
Location: Peterborough, Cambridgeshire, UK.
Posts: 1,897
Default Re: Marconi 4610. Thorn 850.

That's certainly an improvement Mick, A few capacitor replacements should see it right. How does the LOPT look? Any signs of distress? maybe a few short runs would be best at first just to allow any moisture to escape...
Is the UHF tuner a valve one ?

Lets hope the tube holds up, I have always been a bit cautious of commercially built tube reactivators but as you say you only gave it a gentle bop.

I had a Videocircuits booster years back and it was always a bit aggressive. It was very easy to make the emission worse. I got rid and built a "bulb bopper" from one of the Television magazine articles, that worked very well on mono and delta colour tubes.
A few years back I built another one. I have only used it once on a 20" mono tube, it did the trick and years later the tube is still holding up!


Rich
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