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Transmitter Spur
Posted: Tue May 27, 2014 5:38 am
by arlojanis
I have a VHF repeater that seems to be working normally. However, there is an intermittant spur 7 mhz above the repeater frequency. When the spur occurs, it is there continuously, but it slowly drifts several hundred kilohertz. The modulation on the spur is very excessive. Only the repeater audio is heard on the spur. The spur can be heard for 20 miles or more. Why would the modulation increase on the spur?
Re: Transmitter Spur
Posted: Tue May 27, 2014 10:19 am
by Will
Are you trying to run the repeater transmitter at reduced power? Most RF amplifiers are Class C stages and go spurious when run out of the curve.
Re: Transmitter Spur
Posted: Tue May 27, 2014 10:40 am
by arlojanis
It is running full power.
Re: Transmitter Spur
Posted: Tue May 27, 2014 7:42 pm
by Jim202
How about a hint on make and model number. Some one on here might just have some feedback for you.
Jim