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Simplex and repeaters

Se7en

Well-Known Member
Jun 27, 2010
4,573
223
73
Ca
Hmm... two different local repeaters I have programmed on three dif. radios sometimes I am hearing folks break the squelth but there not opening the repeater. How do I solve this issue ?

It's a pain to have simplex people breaking the sq and thinking there on the repeater when clearly there not.
 

That doesn't make much sense.

The input frequency and the output frequency of a repeater are both different.

If you can hear someone breaking your squelch but not keying the repeater; then they are doing something wrong. MOST repeaters will have a PL tone and squelch won't change until the repeater hears it. Both the repeater AND your radio - and other radios MUST have the PL tone set to the same tone for that specific repeater. Your transmit frequency is different from your receive frequency for repeaters.

The only real answer that makes sense is that their radio isn't programmed right. If they are transmitting and you are hearing them - means they are tuning their radio to the output frequency instead of the input frequency for keying that repeater. They may have the PL tone correct; but do not have the input/output frequency offset correct for that repeater. One possible problem is that radio has either set the offset to "-" rather than "+" it requires. Or, it doesn't have any offset, which means it is in simplex mode.

Simplex operation is not allowed on that repeater portion of the band - BTW.

Example:

One particular repeater in my area can be listened to if the PL tone is 100hz and the receive is set to 147.150mhz with a "+" offset. The frequency to transmit on that repeater must have a "+" offset and 600khz of offset AND PL tone of 100hz so that the repeater can be triggered to transmit on 147.750mhz. If someone has a radio set on 100hz PL tone and set to 147.150mhz with a "-" offset; the repeater cannot hear them. So, it is transmitting 600mhz below 147.150! Because it is off by 600khz in the wrong direction when transmitting. They would be transmitting on 146.550 instead! Either there is no offset; or it is set to the wrong "+" or "-" offset.

You can hear them because your radio is set to receive that frequency and has the same PL tone.
Hope that helps . . .
 
Last edited:
Could also be the output of a distant repeater coming in under good conditions. If the repeaters you have programmed transmit a PL, then utilize it.
 
Hi. What is happening as Robb stated: they are talking on the output and just don't know there on a repeater output frequency. Its annoying but not illegal so there isn't much to be done about it except turn up my sq to 9/10 Orkney on the output and let them know that there talking on a output of a repeater. I coulda swore there was allocated spots for simplex. And its not legal to just key where ever you want to and chat....?

M42 I already checked that before making this thread. With a 50mi radius. I thought it was rare.VHF skip I was excited !!! Only to be bummed out.

Sent from my Xoom using Tapatalk 2
 
If the repeater is transmitting a sub tone (ctcss) then program your channel for rx ctcss and then your squelch will only open for that repeater unless the simplex station transmits that same ctcss.
I hope my rambelings make sence
 
If the repeater is transmitting a sub tone (ctcss) then program your channel for rx ctcss and then your squelch will only open for that repeater unless the simplex station transmits that same ctcss.
I hope my rambelings make sence

It does. Thank you. I'll trying that.

Sent from my Xoom using Tapatalk 2
 

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