[aprssig] RC-D710 APRS display head on an old IC-2AT HT

[Robert Bruninga]

Works now.  You need the jumpire wire between the two wires as
shown.
Darn it, ohm out each wire in the RJ45.  its easy to miss
wire... 

> Hummh...
> 
> It doesn't work.  The RC-D710 display head 
> draws about 50 mA for about 1 sec and shuts 
> down (running on a 1 amp bench supply).
> Bob
>  
> > -----Original Message-----
> > Sent: Wednesday, September 24, 2008 6:47 PM
> > Subject: RC-D710 APRS display head on an old IC-2AT HT
> > 
> > > 1)   What is this diagram trying to say? 
> > 
> > Sorry, I had the PG-5J mini-din on there just so I could see
> > what I was doing in tracing out the same signals as they
> appear
> > on the RJ-45 that goes to the RC-D710 Display Head.  Now
that
> > they are traced, I don't need the PG-5J and can just
interface
> > the D710 Display Head to the HT via only the RJ-45 and a
clean
> > source of 9-11 VDC.
> > 
> > > Does the D710 head have a 6-pin Mini-DIN 
> > > connector on it?  Or is it the RJ-45 plug?  
> > 
> > It's the RJ-45 is all you need.
> > 
> > > (The Mini-DIN pinout looks like the standard 
> > > used on many Kenwood/Icom/Yaesu radios with 
> > > the mini-DIN "packet/data" connector on them.)     
> > 
> > Yes, that is why you can plug the RC-D710 APRS display head
> into
> > ANY such modern radio and get the full D710 APRS display
> > functionality on any radio.
> > 
> > > Does this mean a standard mini-DIn-6-to
> > > mini-Din-6 KVM cable will connect the radio 
> > > TX/RX/DCD/PTT signals (but not DC power) to 
> > > the head ?
> > 
> > Yes, and that is all the $80 PG-5J interface is, a connector
> box
> > and a 10V regulator.
> > 
> > > > Wow, a handheld D710.
> > > >
> > > > I just noticed that the RC-D710 APRS display head has a
> spec
> > > > voltage of 9 to 11 volts.  Since 8 nicads would give 8.8
> to
> > 11.2
> > > > volts, I think I will give it a try.
> > > >
> > > > 8 NiCd's taped to the back of the Display Head, will let
> me
> > use
> > > > it with any HT (without having to purchase the $80 PG-5J
> > > > interface which contains the 10 volt regulator) Maybe.
> > > >
> > > > Anyone done this?  Here is my schematic I am working on:
> > > >
> > > > www.ew.usna.edu/~bruninga/aprs/RC-D710-connx-pwr.GIF
> > > >
> > > > Bob, WB4APR
> > > 
> > > 
> > > 
> > > 
> > > --
> > > 
> > > Stephen H. Smith    wa8lmf (at) aol.com
> > > EchoLink Node:      14400    [Think bottom of the 2M band]
> > > Home Page:          http://wa8lmf.com  --OR--
> > http://wa8lmf.net
> > > 
> > > World Digipeater Map
> > >   http://wa8lmf.net/APRSmaps
> > > 
> > > JavAPRS Filter Port 14580 Guide
> > >   http://wa8lmf.net/aprs/JAVaprsFilters.htm
> > > 
> > > "APRS 101"  Explanation of APRS Path Selection &
Digipeating
> > >   http://wa8lmf.net/DigiPaths
> > > 
> > > Updated "Rev H" APRS            http://wa8lmf.net/aprs
> > > Symbols Set for UI-View,
> > > UIpoint and APRSplus:
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > 
> > 
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> > 
> 
>