Yo! Andrew:
Tuesday September 17 1996 01:52, Andrew Porrett wrote to Bill Cheek:
 RA>> Have you seen the recent posting of the Mod for the PRO-43 which
 RA>> opens up the bands from shortwave to 1300 MHZ???
 BC>> It's not 'recent'.  The original developer of the PRO-43 Shortwave &
 BC>> Extended Receive mod is Al Mellon N8KLI, n8kli@aol.com.
 AP> The posting was indeed 'recent'.  No-one said the mod itself was
 AP> recent.  The only error Robert made was to push it up to 1300 MHz.
Oh.  Yeah, ok.  Big difference between 'posting' and 'mod'.  Not sure what 
you mean about 'Robert.......'.
 BC>> Andrew's derivation appears that it might work better than the
 BC>> original because he eliminates the 30-54 MHz bandpass filter that
 BC>> would otherwise attenuate shortwave signals. What it does to VHF-Lo
 BC>> signals for normal scanning is unknown.  Perhaps Andrew will comment
 BC>> on that.
 AP> Perhaps I will.  I do very little low band scanning, so I wasn't that
 AP> concerned with side effects.  Tapping into the antenna input might
 AP> have affected the higher bands that are of interest to me.  VHF-Lo
 AP> signal strengths are unaffected (so sez the S-meter).
Yeah, that would kind of be expected is the BP filter has a low insertion 
loss anyway.  But VHF-Hi signals are apt to sneak in and overload the front 
end a little....maybe.
 AP> The only side effects I have noticed are the occasional pager signals
 AP> coming in on the 46 MHz cordless phone frequencies.  If it becomes a
 AP> problem, I can just cut the jumper.
Ahhhh, overload.  Damn pagers really smoke, too.  300-watts, I think.
Might be slick to whip up some sort of a 6 MHz - 30 MHz Bandpass filter, and 
put it in on a diode switch to alternate between VHF-Lo and HF.  Hmmmmmm.
Bill Cheek | Internet: bcheek@cts.com | Compu$erve: 74107,1176
Windows 95 Juggernaut Team | Microsoft MVP
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