PPRuNe Forums - View Single Post - RAF Fighter Command VHF/DF Fixer Net Early 1950's
Old 1st Jul 2016, 21:06
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Warmtoast
 
Join Date: Nov 2006
Location: South of the M4
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CoffmanStarter

A question if I may. I'm not familiar with the R1392D equipment you mention, so when turning the vertical quad dipole aerial array ... did you use a visual 'Magic Eye' type indicator or an audio null/max signal/noise output to plot the Fix QDR for your station ?
No magic eye, aural effects do it all. To take a bearing rotate the aerial until there is a 'null' in the signal, continue 10-degrees or so past the 'null' and depress the 'sense wheel'. If the audio rises you are 180-degrees out so continue rotating another 180-degrees until one finds the reciprocal 'null'. Again go off 10-degrees from this 'null', depress the sense wheel and if the audio goes down one has the right direction, go back 10-degrees to the 'null' and read off the bearing marked on the wheel and pass it on the always open landline to the controller at Kelvedon Hatch.


WT
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