-=> On 10-04-97  22:57, Curtis Brewington said to Rob Dennis,<=-
-=>"About A tip for HT users.....,"<=-
-=> Quoting Rob Dennis to All <=-
-=> Something About: A tip for HT users.. on 10-02-97  19:26
 
Hi, Curtis;
 
 RD> blocks away it only had occasional burps of  intermod. As in the Yaesu
 RD> and Alinco once the radio was set to mono-band mode  the intermod
 RD> dropped away completely. 
 RD> Give it a try and see what happens.
 CB> I just bought a Kenwood TH-79A. I guess the intermod is all of those 
 CB> ding-dong noises I hear on occassion, sounding like the closing chimes
 CB> on subway cars in NYC. You're right, I only get these noises
 CB> travelling around the city, especially in the downtown areas. 
 
It could be either intermod or crossmod.  The end result is the same, but
they are generated differently.  In the case of intermod, there isn't a
wnole lot you can do about it... the signals are peoduced when two
transmitters which are physically close together are both on the air at
the same time.  With Crossmod there is a cure however.  It's caused by
receiver overload from nearby transmitters on nearby frequencies.  The
cure in this case is to install bandpass filtering at the antenna of your
tranceiver to cut down on out-of-band interference.  This is why HT's that
have extended receive cability are very prone to crossmod while others
without this capability are virtually immune to it, though they still get
intermod.
 
Good luck!
 
73 DE KB9QPM
   Ivy
 
 
 
... Need more bandwidth?  Use a laser!
 
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