Jump to content

Scanning Ham Repeaters


PartsMan
 Share

Recommended Posts

I am wanting to program the local Ham repeater frequencies into my GMRS HT just to see how much traffic there is.

The local Ham club web site lists there repeaters this way.

CLUB VHF REPEATERS: 145.290 (-), 147.150 (+), 147.375 (+)

UHF REPEATERS 444.400 (+), 444.825 (+)

What frequencies should I be scanning?

Link to comment
Share on other sites

Those are the frequencies to scan.  For amateur radio users, the transmit frequencies are calculated by taking the correct offset for the band and either adding it to or subtracting it from the receive frequency, based on the sign in the parentheses.

For 2 meter band the offset is 0.6 MHz.  For 70 cm or GMRS the offset is 5 MHz.

Maybe a couple of examples would help:

For the 145.290 repeater the transmit frequency for hams would be 145.290 - 0.6 = 144.690 MHz.

For the 444.400 repeater the transmitter needs to be set to 444.400 + 5.0 = 449.400 MHz.

Edited by Sshannon
To clarify licensed transmissions.
Link to comment
Share on other sites

2 hours ago, PartsMan said:

I am wanting to program the local Ham repeater frequencies into my GMRS HT just to see how much traffic there is.

The local Ham club web site lists there repeaters this way.

CLUB VHF REPEATERS: 145.290 (-), 147.150 (+), 147.375 (+)

UHF REPEATERS 444.400 (+), 444.825 (+)

What frequencies should I be scanning?

As Sshannon mentioned, you want to add the frequencies shown. Those are the receive frequencies that the repeaters output.

The (-) and (+) indicate the transmitter offset, but are only needed when programming your radio to transmit to the repeater.

Link to comment
Share on other sites

The repeater output frequencies are listed. The (+) or (-) means the repeater input offset (+ or -0.6 MHz for VHF, and +5 MHz for UHF). Whether you can add VHF frequencies to your radio depends on the radio. Some GMRS radios can listen to VHF.

Link to comment
Share on other sites

1 minute ago, PartsMan said:

I just want to receive with this radio.

The + and - are a clear as mud to me.

 

Just now, WyoJoe said:

The (-) and (+) indicate the transmitter offset, but are only needed when programming your radio to transmit to the repeater.

The transmitter offset is based on the receive frequency, but can be higher or lower, depending on whether it's a positive or negative offset.

As Sshannon mentioned above, for the 2 meter band, the offset is 600KHz (.6 MHz), and can be either added or subtracted from the receive frequency depending on + or - offset. For the 70cm band, the same is true, except the offset is 5 MHz.

Link to comment
Share on other sites

13 minutes ago, PartsMan said:

No transmitting. I am not Ham.

I just want to receive with this radio.

The + and - are a clear as mud to me.

Ignore the + and - for now:

1457002665_ScreenShot2022-02-15at9_02_21AM.png.c004ace4dd4e26e7cabe513d46938ea8.png

There is an unofficial Rag Chew just about every morning around 7:00 AM local time on the 145.290-(no PL) MHz repeater. This is a good time for new and old alike. The laid back nature of the conversation allows for passing of information; and questions to get discussed about as well. This is a really good wake-up call!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Guidelines.