I'd have to pull mine out and open it to be sure, but my recollection is that there are no slugs in those antenna coils.
Grant/NQ5T Sent from my iPod On Jan 16, 2011, at 7:51 PM, "Tom Evans, AG9X" <[email protected]> wrote: > Paul, > > I took a look at the schematic and don't see slugs indicated for 20 - 10 M. > If they were originally present but now missing, I'm guessing you'd not be > able to peak the antenna trim cap for maximum band noise on those bands. > > Hopefully someone with a 1A will respond. > > -Tom, AG9X > > > > On Sun, Jan 16, 2011 at 7:39 PM, Paul Christensen <[email protected]> wrote > 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" <[email protected]> > To: <[email protected]> > 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 > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist
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