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

Robert Bruninga bruninga at usna.edu
Fri Sep 26 00:35:12 UTC 2008


Its done!

The D710 Display Head works on an old $88 Alinco HT!  See
photos:
http://www.aprs.org/D710-HT.html

With 1000 mAH nicads it will run about 3 hours.
Ill bring it to DCC.

Bob, WB4APR


> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org 
> [mailto:aprssig-bounces at lists.tapr.org] On Behalf Of Robert
Bruninga
> Sent: Wednesday, September 24, 2008 6:47 PM
> To: 'Stephen H. Smith'; 'TAPR APRS Mailing List'
> Subject: Re: [aprssig] 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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