[aprssig] Green light labs gps

Stephen H. Smith wa8lmf2 at aol.com
Fri Aug 28 16:12:49 EDT 2015

On 8/28/2015 10:52 AM, KF4LVZ via aprssig wrote:
> On 2015-08-28 04:15, Stephen H. Smith via aprssig wrote:
>> On 8/27/2015 10:46 PM, Dale Urban via aprssig wrote:
>>> I have a green light labs gps that I used on my Kenwood D-710. I would
>>> like to use it on my D-700 so I would need to supply power through the
>>> RJ-45 jack. Would anyone know what the pinout is of the RJ- 45 jack on
>>> this gps and which pin is pin 1 and pin 8 Thanks Dale N0KQX
>>> Sent from my iPad
>> Since the D700 and D710 use the same standard Kenwood pinout for their
>> RJ-45 mic jacks, it should be trivial to power it.
> The D700 and the D710 don't use the RJ45 for the same purpose.  The
> control head on a D700 is a 4-conductor (4P4C) modular connector while
> the D710 has the 8-pin (8P8C) RJ45.  In this case he's asking about the
> RJ45 on the control head where the Green Light Labs GPS typically mounts.

OOPS!  I totally forgot that the mic jack on the 710 is on the chassis, not the 
control head, and that the RJ on the head has a totally different pinout!

I HAVE successfully powered modern low-power low-current-drain GPS units from 
the mic jack of the TM-D700 and TM-D742.  I have a variation of this device


that has a RJ-45 Kenwood mic plug on a 6" pigtail on one end and a Kenwood mic 
jack on the other.  The box inserts in-line between the original mic and the 
radio's mic jack.  The TT3 and the attached GPS are powered by the DC on the 
mic jack. I make a point of using a NON-illuminated mic to make enough current 
available for the added hardware.



Stephen H. Smith    wa8lmf (at) aol.com
Skype:        WA8LMF
EchoLink:  Node #  14400  [Think bottom of the 2-meter band]
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