Re: [IRCA] Cape Perpetua, Oregon Cliffside DXing - Sept. 9th

[Walter Salmaniw <canswl@xxxxxxxxx>]

What a wonderful report, Guy, and very interesting at the same time.
I think we've all experienced the huge discomforts at times, DC DXing,
and you've pushed the envelope of efficiency  and comfort now!  I'm
very impressed with the wideband performance of the FSL!  Now, I've
"got to have one"!  I happened to be DXing this morning from 13:15 to
13:55 or so.  Here in Victoria, it was a very typical Japanese morning
with all the 1st tier stations present, often at very nice levels.  By
13:50 or so, there was very little to hear.  I'd say that it was a
"nice, average" Asian DX Fall morning.  I'm spoiled as I have Nick's
DX Fishbarrel on one screen, and the Perseus on the other.  Nick,
clearly, does a bit better than I do on his JJ stations, whereas I had
some hints of DU activity as well.  For instance, towards the end of
my DXing today, 774 was clearly cochannel with NHK2 and the
Australian, neck and neck, both at fair level.  Earlier it was all
NHK2 at very strong level, with an English lesson.  612 also had 2
cochannels, one being Brisbane.  Overall, then, a Japanese morning,
with a very modest DU dawn enhancement, with modest being the
operative word.  I'm looking forward in seeing a wav file or two for
download, too!  73,   Walt

On Mon, Sep 10, 2012 at 6:00 PM, Guy Atkins <dx@xxxxxxxxxxxxx> wrote:
> Yesterday morning before sunrise I sought out the Cape Perpetua, Oregon
> cliff that has served Gary DeBock so well with a flood of DU DX with his
> Ferrite Sleeve Loop (FSL) antenna.
>
> With Gary's encouragement and supply of a regular tuned FSL, and Chuck
> Hutton's help with electrical formulas and initial impedance measurements,
> I was able to convert the FSL into a broadband (non-tuned) loop for
> capturing the entire band with Perseus SDR recordins. The antenna
> accompanied me to Oregon, secured inside a container strapped to the roof
> of our family's vacation vehicle.
>
> The 7-inch FSL was converted to broadband use by the removal of the tuning
> capacitor and the addition of a homebrew 1.6 to 1 turns ratio transformer
> and a Wellbrook FLG100LN amplified Flag antenna module. (FSL >> 26/15 turns
> on Amidon FT140A-J core >> input of FLG100LN >> receiver. Chuck calculated
> the FSL's impedance as 3K ohms at 1.7 MHz; the Wellbrook's input impedance
> is 1200 ohms.)
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