[FoxHunt] TDOA questions.

G8ZHA g8zha at blueyonder.co.uk
Fri Aug 6 13:00:39 EDT 2010


Nice to see some messages on this - Greetings from across the water!

Does anyone have any experience with OAR 320 direction finders? I was given 
four display units and 3 antennas (lucky me)!

They are complete, but one i have powered up so far emitted a bit of smoke!! 
it turned out only to be a tant cap gone short. I have some limited info on 
the units, but I would love to get some more detailed info, especially about 
the synthersizer they use, as i don't think it will lock.

The versions I have are 320ED (which is VHF) and 335 which is a UHF version.

Any information would be appreciated. If any one wants some pictures, please 
let me know.

Regards, Rich G8ZHA




----- Original Message ----- 
From: "wolfbob" <wolfbob at csnsys.com>
To: <whitaker at ieee.org>; "Radio Direction Finding" <foxhunt at mailman.qth.net>
Sent: Friday, August 06, 2010 4:08 PM
Subject: Re: [FoxHunt] TDOA questions.


> There is an DF system that is not used by hams (much) called the
> Wullenweber. It is quite large. See:
> http://en.wikipedia.org/wiki/Wullenweber.
>
> "portable" versions may have used the "Doppler" form of display.  This 
> ring
> of lights has been called a Pelorus but it is a stretch of the nautical
> definition.
>
> WBob, WB6JPI
>
> ----- Original Message ----- 
> From: "C.Whitaker" <whitaker at pa.net>
> To: "Radio Direction Finding" <foxhunt at mailman.qth.net>
> Sent: Friday, August 06, 2010 4:51 AM
> Subject: Re: [FoxHunt] TDOA questions.
>
>
>> Bob,
>> I came across the controller part of a DF system
>> some years ago.  It has a ring of LED's on a 4 X 6
>> box, and uses four quarter wave verticals and all the
>> the switching diodes on a square piece of metal,
>> and that's the part I do not have.  I have the diagram
>> here someplace.   Trivia:  In about 1956 while with
>> the US Air Force I was doing some work on our UHF
>> DF at a RCAF base in Canada.  They had a remote
>> controlled VHF DF, (receiver about two miles from
>> an indicator in the Control Tower), that had a ring
>> of LED's.   Nothing new under the Sun.
>> I'm going to try the TDOA.
>> 73  Clete
>>
>>
>>
>>
>> ______________________________________________________________
>> FoxHunt mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/foxhunt
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:FoxHunt at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>
> ______________________________________________________________
> FoxHunt mailing list
> Home: http://mailman.qth.net/mailman/listinfo/foxhunt
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FoxHunt at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html 




More information about the FoxHunt mailing list