(Re-post) Thanks to "3/4 Blind" for this helpful info: Here's a tip for tuning SSB on SW radios with coarse digital tuning steps and a fine tuning BFO "clarifier." Tune to a WWV time signal on 5, 10, or 15 mHz. etc. whichever signal is strongest, then switch to SSB mode. Fine tune the BFO (On an Eton E5 it's the "fine" knob on the right hand edge.) to zero-beat the audio. As you adjust the BFO the audio changes from a tone to a "thump, thump, thump" until the beat frequency is zero, no tone, no "thump thump...". Then, while still in SSB mode and without further adjusting the BFO, tune to the frequency of interest. If that station is broadcasting right on the kHz. and not a fraction of a kHz. the radio will be properly tuned. For inexpensive portables you may have to repeat the above steps to fine tune the BFO until the tuner stabilizes; things should settle down after about a half hour. A "broadcast" station one might try in American Forces Network on 10320 kHz. evenings PST and 6350 kHz. around 3 a.m. PST. One last point, radios which do not have separate lower sideband (LSB) and upper sideband (USB) filters receive LSB and USB simultaneously. This is usually not a problem as most broadcasters do not use the same frequency for both LSB and USB. I have heard hams do this. It could have been an experiment to test their receivers' filters, or it could have been that two parties wanted to use the same frequency and neither party would move.
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does anyone know if an amplifier can be used with a ferrite loop? how about a wire loop?
is anyone using a magnetic loop for SW with an outboard amplifier with good results?
Posted by: Mike S. | June 30, 2010 at 09:55 AM
oh bother, i put this on the wrong post... but if anyone has comments I'd be very interested.
Posted by: Mike S. | June 30, 2010 at 09:56 AM