Multiple PLs on a conventional frequency

[mavericknet]

Educate me oh great ones;

Here's what I'm working with:
Brand new conventional UHF frequency at 20kHz channel spacing and a large glut of various conventional commodity equipment. Maxtracs/Visar/P1225s and a few CDM series, etc.

What I thought of doing, multiple channels using multiple PLs on the same frequency. On one channel I wanted to use both standard repeated traffic as well as simplex traffic. However, on another channel I want to set up a cross band repeater from UHF to a VHF high traffic frequency. After setting up three handheld radios to the same frequency with on radio on a different PL I found that when I transmitted on the two similar radios than transmitted on the oddball I'd here the oddball on the recieving radio. So that put an immediate damper on my plans and turned me to grubbing for help from this forum.

So, with that... any ideas?

[Jim202]

Had this same conversation with a so called radio tech about 2 years ago. He was under the impression that just because he used a different PL code, he would have another radio channel.

If you put the radios all on the same RF channel, they are still on the same RF channel. By using a different PL tone, all your doing is controlling the receiver squelch. If you put the receiver in the tone squelch mode, it will only hear a transmission with the correct tone squelch that it is set to.

This is how a community repeater is set up. You can have a number of different users that all have a different PL tone. Unless you put the receiver into the carrier squech mode they will not hear the other tranmissions.

Jim