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-   -   Wireless set 109 (http://www.mapleleafup.net/forums/showthread.php?t=27909)

Mike Kelly 13-09-17 08:16

Wireless set 109
 
5 Attachment(s)
Following on from Neil's article , with the WS 109.

Another simple but effective design. These sets are very easy to repair as all of the components are within easy reach , this is a unusual feature for a WW2 military wireless set . Around 1500 was the total production 1939 to 42 , making these sets comparatively rare .

I have used a 109 set on the ham bands and it's a good performer with the transmitter having three 807 valves and a xtal or VFO drive. The VFO is tuned by a rotating coil arrangement , rather than a split air capacitor , the VFO takes a while to settle down but it is not too bad. The AM modulation is strong being plate modulated .

The power supply units changed over the production run , some have four 6X5GT tubes as a full wave rectifier setup . The power source is a 6 Volt lead acid battery.

Mike Kelly 13-09-17 08:43

scenes
 
5 Attachment(s)
109 sets . Some of the PSU had selenium rectifiers rather than the tubes.

Scenes include Malaya and Egypt.

Mike Kelly 13-09-17 08:53

power units
 
2 Attachment(s)
The two different power units as seen in the 109 manual .

One of my 109 sets has a NSWGR tag on it: NSW Govt. Railways ?

After the war, outback stations used 109 sets as RFDS emergency radios.

Mike Kelly 23-10-21 09:28

pic
 
1 Attachment(s)
https://viewer.slv.vic.gov.au/?entit...41&mode=browse


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