Re: [IRCA] ââ"Science Fiction PL-380"-- Pest Control Version

[coffee_canuck <coffeecanuck@xxxxxxxxx>]

Whenever I've taken an ALA100 to Hawaii I've been overwhelmed with its performance - 2 to 4 stations on every 9 kHz split -- and just using a 9 - 12 foot loop of wire...

Colin Newell - CoffeeCrew.com - VA7WWV - Victoria - BC

> On Jan 23, 2016, at 10:10 PM, Walter Salmaniw <canswl@xxxxxxxxx> wrote:
> 
> Sigh!  A good idea, but as you say, a small diameter Wellbrook loop fits
> the bill nicely, except for the lack of backside suppression, which is less
> of an issue at Rockwork.  After my poor experience of a random wire to a
> SDR-IQ in Hawaii, I'm going to seriously look at bring a Wellbrook along on
> my next exotic trip.  I'm sure the results will be far better.  73,...Walt
> 
>> On Sun, Jan 24, 2016 at 4:16 AM, Guy Atkins <dx@xxxxxxxxxxxxx> wrote:
>> 
>> Hi Walt,
>> 
>> To my knowledge no one has perfected a broad band FSL that works with
>> anything close to the performance of a single channel, carefully peaked
>> version. This has often been a topic of discussion between Gary and myself.
>> The broad band FSL I made a few years ago in the end turned out to be FAR
>> below the sensitivity of a tuned FSL. This FSL used a Wellbrook FLG100
>> module as a matching device and amplifier. In use at home I thought it was
>> working well, but on a DXpedition it was sorely lacking vs. a Wellbrook
>> 1-meter active broad band loop.
>> 
>> Different matching ratio transformers have been tried without much success.
>> A tuned FSL is like any other inductively coupled loop in that it's a
>> resonant circuit, and gain goes up sharply at the expense of bandwidth...
>> not of much use for broad spectrum SDR captures!
>> 
>> 73,
>> 
>> Guy Atkins
>> Puyallup, WA
>> 
>> 
>> 
>>> ---------- Forwarded message ----------
>>> From: Walter Salmaniw <canswl@xxxxxxxxx>
>>> To: Mailing list for the International Radio Club of America <
>>> irca@xxxxxxxxxxxxxxxx>
>>> Cc:
>>> Date: Sun, 24 Jan 2016 01:52:37 +0000
>>> Subject: Re: [IRCA]
>>> ââ
>>> â"Science Fiction PL-380"-- Pest Control Version
>>> Fellas, I'm interested again with the removal of the variable tuning
>>> capacitor and use for broad spectrum Perseus SDR captures.  As you
>> recall,
>>> a number of these early large units were kindly built by Gary.  One was
>>> sent my way (and I may have the same in Masset).  Results have been
>>> variable.  Would anything different be done with these units compared to
>>> what we know today?   73,...Walt
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