VHF Frequency Offset

[fallspolice]

I was wondering if there is an easy way to determine a VHF TX frequency when all you know is the Rx frequency. I know with UHF the TX frequency is normally 5mhz higher than the RX frequency. Any help is greatly appreciated!

[Tom in D.C.]

There are no standard offsets for VHF. One might be 800 kHz, and the next one might be 5 mHz or so.

[fallspolice]

There are no standard offsets for VHF. One might be 800 kHz, and the next one might be 5 mHz or so.

Is there a way to find the input frequency using a scanner? A PRO-106 to be exact.

[jmr061]

If it is a public safety freq. look up the owner's licensing on the FCC data base.

Jason

[fallspolice]

If it is a public safety freq. look up the owner's licensing on the FCC data base.

Jason

I tried that. It's the National Park Service in my area. When I look up the frequency the only match is in the state of Wyoming and I am in Ohio.

[resqguy911]

If it is a public safety freq. look up the owner's licensing on the FCC data base.

Jason

I tried that. It's the National Park Service in my area. When I look up the frequency the only match is in the state of Wyoming and I am in Ohio.

Now that you say that, I don't think looking up NTIA frequencies in the FCC database will help much. With your Pro106 you could probably use Spectrum Sweeper if you were close enough to a mobile unit to find the offset.

[ke7joi]

try 0.775 here in the north cascade they use an input of 165.975 and the output is 166.750 I would try - 0.775 from the output.