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

Kent Hufford khufford at atlanticbb.net
Thu Sep 25 01:47:15 UTC 2008


HRO, that was selling them for $199, the HRO web site is out of them, and
cannot order.

Other stores want lots more..

Kent
KQ4KK

-----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 8:24 PM
To: bruninga at usna.edu; 'TAPR APRS Mailing List'
Subject: Re: [aprssig] RC-D710 APRS display head on an old IC-2AT HT


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
>





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