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Old 13-09-17, 08:16
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Mike Kelly Mike Kelly is offline
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Join Date: Feb 2003
Location: Victoria Australia
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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.
Attached Images
File Type: jpg 109-3-1943-hinchinbrook-is.jpg (48.7 KB, 2 views)
File Type: jpg 109-MKI-PSU-INSIDE.jpg (85.2 KB, 1 views)
File Type: jpg 109-psu-badges.jpg (97.5 KB, 1 views)
File Type: jpg 109-PSU-SET.jpg (43.0 KB, 2 views)
File Type: jpg 74425.jpg (46.0 KB, 1 views)
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