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Author Topic: 3cx800a7 burn in?  (Read 1304 times)
NK9N
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Posts: 7




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« on: November 05, 2009, 06:01:39 PM »

Do these tubes require any "burn in" time like a 3-500z?
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W8JI
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« Reply #1 on: November 05, 2009, 06:28:16 PM »

The 3-500Z does not require burn in. It really does no good on a 3-500Z.

The 3cx800A7, if it is not up to snuff from the manufacturer or has been laying around a while, could benefit from a filament cooking if you do NOT apply high voltage.

If you cooked the 3CX800A7 for a few hours with airflow and full rated filament but NO high voltage on the anode it would getter any small amount of gas. If it isn't gettered in that time, it probably would never getter.
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NK9N
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Posts: 7




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« Reply #2 on: November 05, 2009, 07:46:47 PM »

Not sure how to do that without applying high voltage in a Amp  Supply LK800... all I could really do is put it on stby for a few hours.
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