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Re: LF: Best receiver for LF, and qrss activity.

To: [email protected]
Subject: Re: LF: Best receiver for LF, and qrss activity.
From: "James Moritz" <[email protected]>
Date: Tue, 05 Mar 2002 11:58:58 +0000
In-reply-to: <[email protected]>
Reply-to: [email protected]
Sender: <[email protected]>
Dear Giulio, LF Group,

I find the RA1792 generally good on LF - it has a useful selection of filters, sensitivity is fairly uniform down to about 15kHz, quite good strong signal handling, and it has excellent frequency stability for digital modes due to the built in ovened reference oscillator. The main down sides for me are the somewhat idiosyncratic front panel controls and difficult-to-see LCD display, and a slight leakage around or through the filters which means very strong sigs outside the passband are weakly audible. It has no preselector whatsoever - just a 30MHz low pass, but then most receivers do not have effective preselectors on LF anyway. A tuned TX antenna gives adequate preselection, and good sensitivity. There are a number of variants with different microprocessor controllers and displays - the earlier ones tune in 10Hz steps, while my later one tunes in 1Hz steps. My unit has worked fine for over a year now, but some have experienced reliability problems - so be sure to get a manual!. I believe on some units the LCD displays fail after a while. If it does go wrong, it is relatively easy to work on, since it is from before the era of surface mount components.
Cheers, Jim Moritz
73 de M0BMU

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