I like the B&K 467 / 470. It doesn't whack the heck out of the cathode; the way the 465 did, but honestly I've never had a Beltron, and don't know what method it uses. The 467 heats the tube, then gently does a burn-off of the cathode as the filaments cool. No loud pops, and in stead of a big yellow flash, there's a corona-like arc that you can see, as the oxidation falls away from the cathode coating.
Charles
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Collecting & restoring TVs in Los Angeles since age 10
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