![Radio transmitter and receiver unit, from Ptarmigan communications | Science Museum Group Collection Radio transmitter and receiver unit, from Ptarmigan communications | Science Museum Group Collection](https://coimages.sciencemuseumgroup.org.uk/images/62/916/medium_L2014_4179__0002_.jpg)
Radio transmitter and receiver unit, from Ptarmigan communications | Science Museum Group Collection
![Radio transmitter and receiver unit, from Ptarmigan communications | Science Museum Group Collection Radio transmitter and receiver unit, from Ptarmigan communications | Science Museum Group Collection](https://coimages.sciencemuseumgroup.org.uk/images/62/915/medium_L2014_4179__0001_.jpg)
Radio transmitter and receiver unit, from Ptarmigan communications | Science Museum Group Collection
![Radio transmitter and receiver unit, from Ptarmigan communications | Science Museum Group Collection Radio transmitter and receiver unit, from Ptarmigan communications | Science Museum Group Collection](https://coimages.sciencemuseumgroup.org.uk/images/62/917/medium_L2014_4179__0003_.jpg)
Radio transmitter and receiver unit, from Ptarmigan communications | Science Museum Group Collection
![British Army - The Royal Signals - Digital Communications Systems - Ptarmigan - Triffid - Euromux - Personal Role Radio - Cormorant - Falcon - Promina - Digitisation - Armed Forces - a9a6 British Army - The Royal Signals - Digital Communications Systems - Ptarmigan - Triffid - Euromux - Personal Role Radio - Cormorant - Falcon - Promina - Digitisation - Armed Forces - a9a6](http://www.armedforces.co.uk/army/listings/personal_role_radio_b.jpg)
British Army - The Royal Signals - Digital Communications Systems - Ptarmigan - Triffid - Euromux - Personal Role Radio - Cormorant - Falcon - Promina - Digitisation - Armed Forces - a9a6
![Ptarmigan Triffid/Radio Relay FV439 - Military Scale Models - HMVF - Historic Military Vehicles Forum Ptarmigan Triffid/Radio Relay FV439 - Military Scale Models - HMVF - Historic Military Vehicles Forum](https://hmvforum.s3.amazonaws.com/monthly_2013_01/59dcd1690e7f9_inside2.jpg.607c960d46f23910ab0f8d8c4c61167e.jpg)