Tnx for the many private replies from this list and the Boatanchors list. From the number of replies, it's normal for most of the antenna band slugs at L1 to be missing in the 20m-10m slots. One owner had them in 80m-20m, then missing in 15m-10m. So, I suspect this was determined during production of the 1A.
Paul, W9AC ----- Original Message ----- From: Grant Youngman To: Tom Evans, AG9X Cc: drakelist Sent: Sunday, January 16, 2011 9:37 PM Subject: Re: [Drakelist] Drake 1A Coil Slugs 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 ------------------------------------------------------------------------------ _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
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