[Milsurplus] LO DF ing

[Mike Feher]

Unless those front end RF stages you are talking about were of the grounded grid type, they had very little isolation of the LO. 73 – Mike 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell, NJ, 07731

732-886-5960 

 

From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Hubert Miller
Sent: Thursday, August 25, 2016 3:34 PM
To: Milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] LO DF ing

 

The only instances i have read about where a regen receiver has been heard at some distance has been something like “my Knight-Kit ‘Space Spanner’ 

was heard all the way across town”.  I suggest any receiver with an RF stage, regen or super, could not be heard at any distance beyond optical distance

anyway. If this is correct, the only remaining case is where a simple regen receiver with the oscillating detector coupled right to the antenna. How many

of these were still in use by 1940 is the question, and if any remained, how quickly were they replaced. The SW-3s, Sargent 10s, Marconi 730, International

Marine Co. regens all did have RF stages. And as AF6IM pointed out, getting a bearing on a weak signal is another challenge. It appears the evidence for any successes

using such technique is actually nonexistent and at best, highly unlikely.  A part of folklore now about WW2, maybe. 

-H 

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