Upon further investigation of the Drake 1A schematic, it appears the antenna
coils are tuned to resonate with the antenna trim cap such that the trim cap
is at mid range in the center of each respective band. This is necessary on
80m and 40m, but spanning the band from edge-to-edge on 20m through 10m does
not involve much change of the trim control.
I'm beginning to think (perhaps wishfully?) that the slugs were never there
in the first place. Anyone have a Drake 1A that can take peek through the
perforated cover? Tnx!
Paul, W9AC
----- Original Message -----
From: "Paul Christensen" <w...@arrl.net>
To: <drakelist@zerobeat.net>
Sent: Sunday, January 16, 2011 8:23 PM
Subject: [Drakelist] Drake 1A Coil Slugs
I recently acquired a Drake 1A receiver in nice condition except that three
coil slugs are missing in the 20,15, and 10m antenna coils. It appears
Drake used the same slug and phenolic coil assembly for all coils in the
1A.
I've seen these used a million times before: It's a round ferrite slug
with a straight blade slot on one end of the ferrite core. The other end
of the ferrite is attached to a long bass screw. The mating phenolic coil
form assembly is the type that just snaps into the chassis.
I now it's a longshot, but anyone know a source? Is it possible they
simply were not used on the 20m-10m ant coils?
Paul, W9AC
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