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 <[email protected]> > To: Mailing list for the International Radio Club of America < > [email protected]> > Cc: > Date: Sun, 24 Jan 2016 01:52:37 +0000 > Subject: Re: [IRCA] > > "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 > > _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
