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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

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Old 6th May 2019, 7:45 pm   #21
David Simpson
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Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,838
Default Re: Military Desynn Test Set

Right enough, Andy, it was great seeing one of these testers being used to test the Lanc's fuel gauge. Thanks again for the YouTube link. But I understand that their 360deg capability was used to test compass repeaters, and bearing repeaters used with submarine's periscope tracking, & ship's radar & sonar equipment, Navy-wise.
Thinking back to my days on Shackletons,(beefed-up Lancasters) I guess the instrument fitters must have used a same or similar desynn tester, but for the life of me, I just don't remember seeing one.
Anyway, I've thoroughly enjoyed working on this. I might even make up a wee display panel using Martin's old ex Navy indicator & sender, which have lain in his gash box for over 40 years.

Regards, David
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Old 6th May 2019, 7:56 pm   #22
Ed_Dinning
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Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,171
Default Re: Military Desynn Test Set

Hi David, that has come up well.
The tank units I used for the fishtracking bearing indicators were not so robust as yours, but the gauge heads were very similar to yours.
When used as bearing indicators the had some non-linearities on the scale of about 5 deg max. They were originally purchased from Lisle St finest!

I used one many years later on a light aircraft radio trainer I made for the local flying school so the pilot could "report your heading", suitably adjusted by the instructor.

Ed
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