GP68 programming plug - mono or stereo ??

[g8tzl2004]

Batlabs pin outs shows a mono (2 way) programming plug (at GP68) BUT Ebay listings all show a stereo (3 way) plug.

Can somebody please confirm the correct plug.

Thanks

[HLA]

you do realize you can't program the radio frequencies thru that right? that's for tuning only

[g8tzl2004]

Yes, just for alignment.

My GP68 is 1.5Khz off freq but I can't enter Service Mode - just getting "accessing serial bus" - real RIB works OK on other radios.

[Al]

A mono(2 way) plug works fine, bus+ to tip, common to ring. A 3 way might work, don't know because I've never used one.
GP68 service manual call for use of a mono plug.
If the plug isn't inserted all the way so the tip doesn't make contact you'll get the message that you described.

[g8tzl2004]

Plug is inserted all the way - GND continuity and tip "impedance measure" continuity.

Using version R04.00.00 RSS - so would expect "codeplug too new" type message if wrong version of RSS - there is a later R04.01.00 version.

Get same message if lead not even plugged in!! Real RIB works fine with Maxtrac which uses "same" pin out (GND , +BUS)

I suspect that serial interface is faulty on "rubbish" HK GP68 - radio is UHF and works but sticker on radio indicates VHF - so maybe UHF RF board added to a scrap VHF radio??

Ebay GP68 programmer listings all show stereo 3 way plug but if GP68 socket is mono, then 3 way probably works OK and probably cheaper to buy.

[sparkster]

Bit late i know, but just for info the gp68 has a stereo plug.