View Single Post
  #3   Report Post  
Old December 22nd 06, 06:50 PM posted to rec.radio.amateur.antenna
Jeff Jeff is offline
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 158
Default IMD products from VSWR meters

Hi Owen,

It sounds like sophistry. In years past when the FCC was more
vigorous in chasing spectrum trash, they would have nailed this down
for the transmit side. Even barring that argument, nearly every piece
of gear produced in the past 30 years has a built in SWR meter. Any
IMD from those (and, by abstraction, external units) is probably 50dB
to 60dB down.

73's
Richard Clark, KB7QHC


Someone I used to work with spent a long time trying to suppress the
harmonics from a model aircraft radio control transmitter, only to find that
they were generated by the detector diode in the o/p power meter.

Also in the UK it is a licence requirement for CB that power/vswr meters are
only used for setting up and are removed for normal operation.

Jeff