[Milsurplus] [ARC5] DAG HFDF Sense Antenna.

[Brian Harrison]

(Mike, I’ve responded to you directly - I’ll loan you the sense antenna from my working DAG if you want to try and make one, it might not be too hard)

To the group:

I’m looking for the CZD-10210 compass that mounts inside the loop antenna

I also have a parts DAG pretty much complete with loop antenna but no sense antenna if anyone is interested or needs other parts - (rx has bad IFs) - enclosed is a pict of what’s available… pse contact me off-list

TU and all the best,

brian
kn4r



> On Apr 2, 2021, at 8:34 AM, Mike Feher <n4fs at eozinc.com> wrote:
> 
> Hi Mike – 
>  
> Of course, I appreciate and understand the need for the sense antenna. I suppose two of these separated by considerable difference (depending on resolution required) and with comms between the two, the ambiguity could be resolved. In one direction they would converge to the location while in the other diverge forever. Hope all is well with you. Thanks &73 – Mike 
>  
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell NJ 07731
> 848-245-9115
>  
> From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Michael Hanz
> Sent: Friday, April 2, 2021 8:00 AM
> To: Mike Feher <n4fs at eozinc.com>; 'David Stinson' <arc5 at ix.netcom.com>; 'milsurplus at mailman' <milsurplus at mailman.qth.net>; 'ARC-5' <arc5 at mailman.qth.net>
> Subject: Re: [Milsurplus] [ARC5] DAG HFDF Sense Antenna.
>  
> I can't answer the ambiguity question as posed, Mike, but the need for a sense antenna is well documented back in the early 1930s, perhaps even earlier.  That and other considerations are described at https://aafradio.org/docs/1936_NRL_Aircraft_Radio_Training_Manual_DF_Chapter.pdf <https://aafradio.org/docs/1936_NRL_Aircraft_Radio_Training_Manual_DF_Chapter.pdf>  (page 107 begins the sense antenna discussion).
> 
> - Mike  KC4TOS
> 
> On 4/1/2021 10:56 PM, Mike Feher wrote:
>> I have never seen a DAG till I saw your request below. Sure is a neat receiver. I wonder if all of those early sets had no way to resolve the 180 degree ambiguity. 73 – Mike 
>>  
>> Mike B. Feher, N4FS
>> 89 Arnold Blvd.
>> Howell NJ 07731
>> 848-245-9115
>>  
>> From: arc5-bounces at mailman.qth.net <mailto:arc5-bounces at mailman.qth.net> <arc5-bounces at mailman.qth.net> <mailto:arc5-bounces at mailman.qth.net> On Behalf Of David Stinson
>> Sent: Thursday, April 1, 2021 10:25 PM
>> To: milsurplus at mailman <milsurplus at mailman.qth.net> <mailto:milsurplus at mailman.qth.net>; ARC-5 <arc5 at mailman.qth.net> <mailto:arc5 at mailman.qth.net>
>> Subject: [ARC5] DAG HFDF Sense Antenna.
>>  
>> Does anyone have or know of this sense antenna?
>> It is the only piece missing from my DAG.
>> I would pay or trade well for it.
>> 
>> TNX ES 73 DE Dave 
>> 
>> 
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> 
> -- 
> Michael Hanz - KC4TOS
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