Does anyone have any tips for plugging a GU74B into the mating SK1A
socket.? The sosckets iin my amp are recessed below the chassis about about
1 inch, and I always have a devil of a time plugging in the tubes. There's
a spring-loaded retaining ring that slides around phospher-bronze clips that
press against the tube the screen ring. I think one is supposed to be able
to slide the tube into the socket without removing the ring, but little
clips bend easily and get in the way. The holes in the bakelite socket are
not beveled, so the tube pins have to be exactly aligned with the holes or
the tube won't slide it, and that's hard to do, even without the retaining
ring getting in the way. They only way I've been able to insert a tube is
to remove the bottom cover of the tube chassis. Then, with the retaining
ring around the pick ceramic part of the tube, I slide the tube into the
socket. Then I turn the amp upside down and with a pair of long-nose
pliers, compress the retaining ring from below and try to get it on the
outside of the spring-loaded clips. Eventually, I succeed in plugging in the
tube, but it's about a half an hour of trial and error. What s stupid ,
stupid socket design, but I'm not aware of any equivalent replacements.
73,
Jim W8ZR
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