[OZAPRS] APRS interface

Glen English VK1XX glenlist at pacificmedia.com.au
Sun Nov 26 13:14:19 AEDT 2017


Hi Bob

have you tried taking the microphone apart and figuring it out?

That would be my way

BTW those radios don't really meet any sort of acceptable RF emission
requirements.

Up to you.

I would recommend against their purchase unless you use with a decent
outboard band pass filter.

-glen



On 26/11/2017 12:58 PM, Bob wrote:
> I recently bought a ZASTONE Z218 25W VHF UHF transceiver to replace my
> 5W Baofeng APRS beacon in the car, or a build a fill-in Wide1-1
> digi/Igate for the Nowra area.
>
> I'm having a hell of a time making my home-brew (Buxcom V3 based) work
> with this radio. It worked with the FT-817.
>
> Here is what little info I found trolling the Internet, for the
> benefit of others. The manufacturer can't be bothered to answer emails.
>
> ZASTONE Z218 25W VHF UHF transceiver is the same as BAOJIE BJ218 or a
> Luitton LT-725UV
>
> Looking at the 8pin RJ45 connector on the front of the radio, pin 1 is
> on the left. Is this correct?
>
> Pin 6 is ground, definitely. (Ohmmeter)
>
> Pin 3 is the Mike, according what I found on a Russian site. Pin 5
> also appears as PTT from Russian site but wont make the radio TX when
> grounded. Pin 3 does. Here is my confusion.
>
> PTT is Pin 3 to ground via around 2kOhms this works but no audio to
> the radio. Derived experimentally.
>
> Pin 7 has 8 Volts on it to light the LEDs in the mike? Not relevant
> but might be handy.
>
> I tried to make a data cable for programming but no luck there either
> so I had to buy one from fleebay. $9 with driver, posted (not here yet)
>
> Chirp does not directly support this Radio yet.
>
> Just wondering if someone else has tried to use one of these $85
> delivered, radios before I try to reinvent the wheel?
>
> Thanks, Bob, vk2byf
>
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