[OZAPRS] TT3 and a fm900 radio

Maurie Stanford maurie at remoteareacomms.com.au
Thu Jun 18 10:51:26 EST 2009

This is my set up.
Overview: I use a RT85, tt3 and a 12v gps engine. The tt3 and engine get 
12v switched from the radio.
 The 12v from the radio goes to pin 7 on the db9f on the tt3.  Pin 4 on 
the db9m (GPS end)  takes 12v  to the engine. Jumper 7 in the tt3 is 
bridged to give the path through the tt3.
If you search through the WICEN  Vic  pages  - data section - you will 
find various pin out options for the FM92.

Maurie  vk3vlr

David McAulay wrote:
> Hi All
> Wonder if someone maybe able to help please.
> A couple  of us here in VK3 have ordered the tt3 from the usa, and in prepartion are trying to make up a cable to suit a fm900 radio using the 8 pin din on the back of the radio. We propose to use the middle pin which  is not connected at present to supply 12v to the tt3. The gps we propose to use is a 12v unit
> Looking at the tt3 web pages and cicuits between us we are still confused on what pins of the tt3 db9 we use
> and to what pins of the fm900
> Im sure someone has done it
> Could I ask you share this please with me
> Thank you
> All replies appreciated
> 73 David VK3EW
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