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| Monday, October 31 | | · | ''...and the verdict is...'' |
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 | Summer Happenings |
 With the arrival of summer there are a couple of items to mention.
First, a new 100% duty cycle 100 watt PA for the repeater was purchased. It should be here within a week and installed within the next two weeks.
Second, for the summer months we can look forward to sporadic broadband interference consisting of a modulated 60 Hz hum present on the repeater input frequency. This hum is most likely generated by a mast mount TV amplifier for an RV. This interference is extremely wide (taking up to 2 MHz of bandwidth) and is constantly on the move up and down the band. The theory is that the interference moves as the temperature changes but we do not know for sure. The interference was DF'ed at one point, but due to the nature of the signal, it is extremely difficult to get a fix. At this point we believe it to be in northern York County. This interference is also affecting other UHF repeaters in the area (public safety).
Since this interference is present without a PL tone, you will only notice it when someone tries to use the repeater. They will sound like someone is keying up with them and may sound squirrelly during a transmission. The best way to know for sure that the interference is present is to turn the PL tone for the repeater off (refer to the codes section of the web page) and listen for the hum. If you do turn the PL off to listen, please don't forget to turn it back on once you have ID'ed the interference.
As always, stay tuned!
73 de Keith - N1FTE
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