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Author Topic: 572B Tube Socket Question  (Read 1980 times)
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W9ZSL
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« on: February 12, 2016, 06:47:03 PM »
I finally made a commitment to use a pair of 811As to get my modulator build started.  I have one JAN with another RCA JAN on the way.  I have a pair of Johnson 123-209-31 sockets with locking bases. I want to build it with the idea of upgrading to 572Bs eventually.  Can I use the Johnson sockets?  Do the 572Bs have a locking pin or should I go with a heavy-duty ceramic socket instead?  I can always modify the chassis for different sockets, but I'd rather use a pair that will work for either tube.  Suggestions?

Mike
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Steve - K4HX
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« Reply #1 on: February 12, 2016, 08:06:42 PM »
Same socket.
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W9ZSL
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« Reply #2 on: February 12, 2016, 08:39:37 PM »
So the 572B DOES HAVE the locking pin Steve? Cool! I certainly want to use the Johnsons.  No problem with the filament iron either since the voltage and current draw is the same.
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