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Re: [IRCA] ââ"Science Fiction PL-380"-- Pest Control Version
- Subject: Re: [IRCA] ââ"Science Fiction PL-380"-- Pest Control Version
- From: Guy Atkins <dx@xxxxxxxxxxxxx>
- Date: Sat, 23 Jan 2016 20:16:42 -0800
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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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