[600MRG] RAKs and such - ballast tube.

[Bill Cromwell]

I haven't played with superregens. I wonder if the signal is stronger or 
more pronounced than a plain regen.

I have read of some hams using superregens to copy local repeaters 
accidentally jamming some local hams - within a few city blocks of the 
superregen. My impression of superregens has always been one of it being 
a particularly 'dirty' radio.

In private email somebody offered a reference to a WWII german submarine 
being discovered when a destroyer noticed a signal from the submarine's 
superregen radar detector. The reference came with a starting point on 
the trail and I'll chase that one to it's conclusion. Information like 
that is likely to have come from logs and action reports. Those reports 
and logs can still be found in archives. Even logs and reports from 
vessels that did not survive the war are still available up to a point 
before the vessel was lost. In some instances the log were removed by 
the survivors when they abandoned the ship. I would like to see "first 
conact with the enemy vessel came from detection of it's radio receiver" 
(from 30 miles away?). No logs are available from the Titanic I suppose. 
Maybe a few reports that were filed before she left on her maiden 
voyage. The captain and senior officers did not leave Titanic with logs.

Onward to the library.

73,

Bill  KU8H

On 11/04/2014 10:40 AM, NMF wrote:
> WW1 was rife with ship board super-regens coupled directly to an 
> antenna which made for a 'beacon' like signal that the enemy soon 
> discovered...
> Then came ECM...
>
> Adding TRF stage or stages made for 10s of DBs of isolation while 
> reducing QRM while adding selectivity to the detector...
> We started WW2 clean with good receivers...
>
> Still wondering about hydrogen in the ballast element envelope... 
> Maybe Nitrogen??
> We find hydrogen in ignitrons though...
>
> More super regen: I once coupled a frequency counter to a 1920s radio 
> and could see the 'exact' frequency usually reading within a few HZ., 
> thanks to Major Armstrong who knew what to do with a triode...
>
> Fooled around with 420mc. regen transceivers and it was good for 100s 
> of yards of detection with a 'deaf' receiver...
>
> TNX from Dave @ /17
>
>
>
>
>
> On 11/4/2014 9:31 AM, Bill Cromwell wrote:
>> That was a fear during the wars. I wonder just how far we can DF an 
>> oscillating regen detector.
>
>
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