Dear Russ,
Thanks for the advice. Lots more tinkering to do in the lab.
--John
Russ Edmunds <wb2bjh@xxxxxxxxx> wrote:
--- John Cereghin wrote:
> Ack! Questions!!! :)
>
> 1. 15 turns.
> 2. Indirect coupling. Using the ferrite rods in my portables. I
> have yet to try a direct hook-up to my FRG7 or my DX150B. That's
> next.
> 3. I have a ceremaic capacitor (salvaged from a crystal radio set)
> and a 1-gang and a 2-gang air capacitors. I'm experimenting with
> all three right now but currently have the ceremaic capacitor hooked
> up.
>
>
Sounds to me as if you ought to wire in the ceramic across the
terminals you're connecting to on the variable ( whichever
of those
works better ). Normally, a failure to tune the low end of the band
inidicates a need for more capacitance; inability to tune the top
usually means not enough turns.
You'll need one variable with or without the ceramic as needed, to be
able to tune the loop.
I asked about how you were coupling to try to see if there might be an
issue there, but since you're using proximity coupling n o problems there.
Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20ID
FM: Yamaha T-80 & APS9B @15'
AM: Hammarlund HQ-150 & 4' FET air core loop
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