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Old 13-09-17, 08:16
Mike Kelly's Avatar
Mike Kelly Mike Kelly is offline
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Default Wireless set 109

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.
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109-3-1943-hinchinbrook-is.jpg   109-MKI-PSU-INSIDE.jpg   109-psu-badges.jpg   109-PSU-SET.jpg   74425.jpg  

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Old 13-09-17, 08:43
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Default scenes

109 sets . Some of the PSU had selenium rectifiers rather than the tubes.

Scenes include Malaya and Egypt.
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Jan29$31.JPG   MALAYAVAN-RAD.jpg   egypt42.jpg   109-rx-ing.jpg  
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1950 Land Rover signals replica
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Old 13-09-17, 08:53
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Mike Kelly Mike Kelly is offline
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Default power units

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.
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109-PSU-INSIDE.jpg   109-PSU-INSIDE-SELENIUM.jpg  
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1941 Morris-Commercial CS8
1940 Chev. 15cwt GS Van ( Aust.)
1950 Land Rover signals replica
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