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Yeah some of the optimistic possibilities I was thinking of were along the same lines - it didn't really need it but the shop put one in for a few extra bucks...maybe the guy had low line voltage and this was to boost the filaments a bit (the pic tube tester booklet lists this as a possibility for a tube testing ok on the tester but not performing accordingly in the set)...do-it-yourself owner having a cap or resistor or tube going bad elsewhere and trying this as a cheap and quick fix....the old tube had the booster and when they slapped in the rebuilt one, they just left the booster on for the heck of it.
The fact that it's a rebuild of a newer tube gives me more hope too, if it was the same old original one in there AND a booster then I'd be more pessimistic about the outcome. Oh well time to pull the chassis out and start testing everything ELSE! It has no cataracts either so that's another plus : ) If the tube ends up being a winner you might see my booster on ebay ; )
thanks...Frenchy
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