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» Elite Fleet's first run at Nauticus of the summer months
Using an old TX with 458Mhz openLRS EmptyTue May 21, 2019 5:20 pm by merriman

» openLRS and 2.4 Ghz and Submarines
Using an old TX with 458Mhz openLRS EmptyFri May 17, 2019 12:14 pm by david f

» Assembling the excellent Scale Shipyards 1/96 SSBN, USS Daniel Webster
Using an old TX with 458Mhz openLRS EmptySat Apr 27, 2019 1:20 am by merriman

» Pinger 3 - Distance measurement (Triangulation, Transponders and Clocks on Board)
Using an old TX with 458Mhz openLRS EmptyFri Apr 26, 2019 4:29 pm by david f

» Eden Dynamic WTC
Using an old TX with 458Mhz openLRS EmptyFri Apr 19, 2019 3:20 pm by Deepdive

» John Lambert Plans
Using an old TX with 458Mhz openLRS EmptyMon Apr 15, 2019 2:27 pm by david f

» Telemetry on openLRS
Using an old TX with 458Mhz openLRS EmptyMon Apr 15, 2019 2:23 pm by david f

» Assisting with a 1/96 NOVEMBER class kit
Using an old TX with 458Mhz openLRS EmptyWed Apr 03, 2019 12:36 pm by merriman

» trimming 1/96 USS ALBACORE
Using an old TX with 458Mhz openLRS EmptySat Mar 23, 2019 12:37 am by merriman

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Similar topics

      Using an old TX with 458Mhz openLRS

      david f
      david f
      AMS Treasurer

      Posts : 2030
      Join date : 2010-11-10
      Age : 68
      Location : Cumbria

      Using an old TX with 458Mhz openLRS Empty Using an old TX with 458Mhz openLRS

      Post  david f on Sat Jun 27, 2015 11:02 am

      Well this turned out to be a remarkably straight forward job by simply plugging an Orange module (Thanks for the module Dave J) into the  Trainer socket of  an old transmitter. (In this case one of the late Brian A's old aircraft transmitters a 35Mhz Skysport 7 transmitter.)

      I removed the aerial and crystal to knock out the Radio Frequency section. (I think that is the right thing to do - perhaps someone could confirm this?)

      Using an old TX with 458Mhz openLRS Img_4610

      I identified the Trainer socket pin-outs from one of the many online guides e.g:

      http://www.endurance-rc.com/pinouts.php

      http://users.belgacom.net/TX2TX/tx2tx/english/tx2txgb7.htm

      You need to identify TX battery positive, ground and ppm out.

      In the TX I used this was:

      Pin 1 , +ve
      Pin 2, ppm out
      Pin 6 & cable screen, ground

      (It is a good idea to check these with a voltmeter, if you have one. If I recall correctly the ppm signal will appear as an intermediate voltage.)

      Connect these up to the input pins on the Orange module. (I wired up a socket to help with this. You can identify the correct pins by reading the printing on the circuit board.)

      On the TX module I used the pins are from left to right:

      RF - aerial connection , so not used
      GND - ground
      VIN - +ve transmitter voltage in
      GND - ground
      PPM -ppm in

      Plug in, power on and bind the module to the Orange RX by pressing the "Fail safe" button on the back of the module as you power up the TX.

      You will then find the TX functions as before but with a new, whizzy state- of- the-art radio frequency section. The Skysport is a non-computer set with lots of twiddly controls in the battery compartment to do servo reverse and perhaps some mixes. I didn't touch these!

      Remarkably simple to put new life into old transmitters!

      My aerial/module fixing arrangements could be improved of course. If there is space it may be possible to put the bare module in the TX case. It might also be possible to modify TX's without Trainer sockets but you may be getting a bit skinflint to have to do that! (They will be very old sets.)

      David
      david f
      david f
      AMS Treasurer

      Posts : 2030
      Join date : 2010-11-10
      Age : 68
      Location : Cumbria

      Using an old TX with 458Mhz openLRS Empty Re: Using an old TX with 458Mhz openLRS

      Post  david f on Thu Sep 03, 2015 1:55 pm

      This was sparked off by a conversation with John W at Haydock Park.

      This link shows that you get really retro with state of the art openLRS stuff!

      Substitute an Orange openLRS module for the 2.4Ghz, I assume?

      http://www.modelflying.co.uk/forums/postings.asp?th=94809&p=1

      So don't throw away those old TXs.

      David

      Later Edit , April 2016

      I have just put the Arduino Sketch for Phil's encoder in the Files section of the Website: (Thanks John and Phil)

      http://associationofmodelsubmariners.com/files.php

        Current date/time is Sun May 26, 2019 6:34 pm