[TenTec] CW Filters

[AC5E@aol.com]

Most solid state transmitters emit a signifgant amount of "phase noise."  
You can clearly see these spurious emissions on the ARRL labs spectral purity 
pictures. Since they are transmitted over a wide band near the transmitter 
frequency they make life in close proximity to other transmitters miserable.  


We have tried a couple of highly touted rigs that we could not use at all 
because of  their phase noise. While the Omni VI is the quietest of the rigs 
we have tried at field day, the only solution we have found is to reduce the 
output power to the 60-70 watt level. We can run two VI's with their antennas 
less than 150 feet apart on the same band but different modes without serious 
interference at that level.  We cannot operate on the same band and mode 
without serious interference. And extra filters won't help. 

73  Pete Allen  AC5E


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