I have a question on how to connect the 226-3 roller inductor into an
amplifier tank circuit. I am currently using one of these roller inductors
in a homebrew 3CX3000 amp and another one in a Henry 4K Ultra. The one in
the Henry is the original one used by Henry. On the Henry, the non grounded
side of C1 is connected to the wide spaced end of the coil and C2 is
connected to the rail that has the (wiper)traveler on it and this makes
contact with the turns of the coil as it is rotated. The homebrew 3X3 is
wired up exactly the same. The difference is on the Henry the top rail is
also connected to the narrow spaced end of the coil with a strap but on my
HB amp it doesn't have this connection. My question: does this connection
between the far end of the coil and the rail short out the unused part of
the coil? I think I already know the answer(yes). What benefit does this
provide? Is it an absolute necessity? I don't use the amp above 20M. If
so I have been using the 3X3 amp unshorted out for 4 years. Maybe this is
why everytime I tune up the amp my garage door opener needs to be reset in
order to work.
Thanks,
Bob Maser W6TR
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