How to Find Input Freqs

[jred184]

I have submitted a couple of freqs to RR and the admin would sometimes add the input freq.

How do you find the input or even know that there is one?


Thanks,
JRed

 

[K5MAR]

I have submitted a couple of freqs to RR and the admin would sometimes add the input freq.

How do you find the input or even know that there is one?


Thanks,
JRed

It may have been grouped with another submission that had the input freq, or if it's a UHF freq, the input is +5 Mhz. That can generally be determined by looking at the FCC license.

Mark S.

 

[msharp]

What the heck, I'm bored and going to post the reverse list. I tried searching google for a premade list to post a link to, but could not find one, so here goes. The Offset (input frequency), listed in the parenthesis, is in Mhz ie (-0.1 Mhz).

Also note that if a particular frequency range is not included below, it is because there is NO offset (reverse/input freq) for that range. The transmission and reception would be on the same freq. A good example of a range with no reverse/input freq is 148.1550-222.1150


FREQ MHZ OFFSET

29.52-29.58 (+0.1)
29.62-29.68 (-0.1)
52.01-52.99 (+1)
53.01-53.99 (-1)
143.750 (+4.375)
143.900 (+4.25)
144.51-144.89 (+0.6)
145.11-145.49 (-0.6)
146.01-146.385 (+0.6)
146.415-146.505 (+1)
146.595 (+1)
146.61-146.985 (-0.6)
147.00-147.39 (+0.6)
147.415-147.505 (-1)
147.595 (-1)
147.60-147.99 (-0.6)
148.125 (-4.375)
148.150 (-4.25)
222.12-223.38 (+1.6)
223.72-224.98 (-1.6)
420.00-424.9875 (+5)
425.00-429.9875 (-5)
440.00-444.9875 (+5)
445.00-449.9875 (-5)
450.00-454.9875 (+5)
455.00-459.9875 (-5)
460.00-464.9875 (+5)
465.00-469.9875 (-5)
470.00-472.9875 (+3)
473.00-475.9875 (-3)
476.00-478.9875 (+3)
479.00-481.9875 (-3)
482.00-484.9875 (+3)
485.00-487.9875 (-3)
488.00-490.9875 (+3)
491.00-493.9875 (-3)
494.00-496.9875 (+3)
497.00-499.9875 (-3)
500.00-502.9875 (+3)
503.00-505.9875 (-3)
506.00-508.9875 (+3)
509.00-511.9875 (-3)
806.00-823.9875 (+45)
851.00-868.9875 (-45)
896.00-901.00 (+39)
935.00-940.00 (-39)

 

[loumaag]

I have submitted a couple of freqs to RR and the admin would sometimes add the input freq.

How do you find the input or even know that there is one?

Another point is that we (admins) usually check submission against the license data. Lots of times a license is issued for a single pair of frequencies. When that is the case, it easy to determine the input.

 

[jred184]

Thanks for the help!

JRed

 

[Al42]

Also note that if a particular frequency range is not included below, it is because there is NO offset (reverse/input freq) for that range. The transmission and reception would be on the same freq. A good example of a range with no reverse/input freq is 148.1550-222.1150

There are a lot of repeaters in the high VHF band. (Every repeater has at least one input frequency.)

 

[K5MAR]

Probably what he means is that there is no "official" offset in the VHF-high band. It's catch-as-catch-can. In my area, there are VHF-high repeaters with seperations all over the place. One is only 245 KHz, another is 4.9 MHz.

Mark S.

 

[twolf816]

and some, not many but a few, use simplex repeated like the forestry where theres 1 frequency but theres repeaters every 20miles or so. and i believe, please correct me if im wrong, but i think that ham repeaters are an example of this

 

[loumaag]

and some, not many but a few, use simplex repeated like the forestry where theres 1 frequency but theres repeaters every 20miles or so. and i believe, please correct me if im wrong, but i think that ham repeaters are an example of this

There is such a thing as a single frequency repeater, but it is more a toy than anything else. I know of no public service or commercial repeater that uses it (at least for voice) and there was a device being sold to the Ham market to do it. It basically records the transmission and then retransmits it on the same frequency. Obviously it could not do it every 20 miles or so, or it would continue to repeat back and forth. Ham's do use this process for digipeaters (digital signal repeaters) for packet radio, but the packets themselves (along with the software in the Terminal Node Controller) keep it from being repeated more than once by each digipeater so it works in that limited application.