Re: Digital voice vs analog

#211977

900 MHz is where we did the most experimentation with hearclear. One local repeater runs it, another does not. We tested on Mike k8mdm's 900 quantar with and without it as well.

We normally don't run it on our fm repeaters If there's a chance folks are using non Motorola radios.

Originally we were using maxtracs as remote bases, but lately have shifted to GE TMX and Phoenix's. I designed an adapter board that allows you to plug a RIM lite for the maxtrac into a GE TMX.

I seem to recall the 4550s and 5550s also having hearclear on DMR, but that could be my rusty memory. I know the 4580 and 5580 have it.

73,
Alan km4ba

On January 4, 2025 10:15:25 AM EST, "Milton Engle via groups.io" <n3ltq@...> wrote:

If I recall correctly Motorola’s HearClear system was only available on 900MHz and maybe 800 MHz radios.  It was not available on VHF & UHF.  

On Jan 3, 2025, at 11:23, Alan KM4BA <ml9003@...> wrote:

?On 1/2/2025 2:24 PM, Jim Barbour via groups.io wrote:
Ok, I know some motorola's had something they called "hear-clear" that is a compandering scheme, but I'm sure not every radios had it...
Others mfg's also had some form of compandering, but not all.

We have experimented with hearclear on both moto FM and DMR radios and FM repeaters. Also Maxtrac based remote bases.

If you are running Moto radios so the whole system is hearclear, it's a great thing. If some of the radios are not, it's noticable but still useful.

Have fun,
Alan KM4BA





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thanks,
Alan

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#211977

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