[time-nuts] 60kHz Loop antenna

Dick Moore richiem at hughes.net
Sun Oct 3 01:56:53 EDT 2010


Alan, I did try a real half-a$$ed pile of wire and a tuning cap. My shop has fluorescent lights and I got a lot of noise. Once I built the shielded loop and got it lined up with east and a little south (I'm in Washington State), WWVB came in gang-busters. This was before I built a GPSDO or two and then got a TBolt.

The shielded loop has just been sitting for years.

Dick


On Oct 2, 2010, at 3:42 PM, time-nuts-request at febo.com wrote:
> 
> Message: 5
> Date: Sat, 2 Oct 2010 23:40:52 +0100
> From: "Alan Melia" <alan.melia at btinternet.com>
> Subject: Re: [time-nuts] HP/Dymek DY-5842
> To: "Discussion of precise time and frequency measurement"
> 	<time-nuts at febo.com>
> Message-ID: <015501cb6283$10071ad0$4001a8c0 at lark>
> Content-Type: text/plain;	charset="iso-8859-1"
> 
> Dick did you ever try an unscreened loop ?? they should be just as good if
> not better at 60kHz.
> Alan G3NYK
> 
> ----- Original Message ----- 
> From: "Dick Moore" <richiem at hughes.net>
> To: <time-nuts at febo.com>
> Sent: Saturday, October 02, 2010 11:22 PM
> Subject: Re: [time-nuts] HP/Dymek DY-5842
> 
> 
>> I used to have one of these marvelous receivers and sold it. I still have
> the WWVB/60kHz shielded loop antenna that I made for it and although it is
> big, at about 30" x 30" x 2" or so, I believe it will ship FedEx or UPS OK.
> It's free to anyone who'll pay the shipping. It's made out of copper pipe
> and works quite well, and is tuned for the 5842 at 60kHz.
>> 
>> Best,
>> Dick Moore
>> 
>> 
>> On Oct 1, 2010, at 3:50 PM, time-nuts-request at febo.com wrote:
>> 
>> 
>>> Message: 5
>>> Date: Fri, 01 Oct 2010 16:34:57 -0600
>>> From: ziggy9 <ziggy9 at pumpkinbrook.com>
>>> Subject: [time-nuts] Possibly OT - Any interest in a vintage HP/Dymec
>>> DY-5842 VLF receiver?
>>> To: <time-nuts at febo.com>
>>> Message-ID: <990bd60b3c5d084910c10c8855912ddf at pumpkinbrook.com>
>>> Content-Type: text/plain; charset=UTF-8
>>> 
>>> 
>>> Fellow time-nuts:
>>> I've got a circa 1964 DY-5842 VLF receiver. This is (was) operated in
>>> conjunction with an external time interval counter to make a frequency
>>> comparison. So you would select WWVL for example, and use that as your
>>> primary standard for comparison to your local standard. It's got 5
> crystals
>>> in it: 16, 18, 19.8, 20, and 60 kHz (listed as GBR, NBA, NPM, WWVL,
> WWVB).
>>> It works and I have the manual. The thing is, the interest in something
>>> like this is bound to be a bit narrow, so I thought I'd mention it here.
>>> 
>>> So if there are any collectors, equipment museums, etc. that might be
>>> interested in this, please let me know. I'm a bit sentimental about this
>>> thing, it's sort of a bit of history, and from what I can tell, somewhat
>>> rare (doesnt make it worth anything though :). Since it's a bit of a
>>> curiosity, I'd like to pass it to someone that might be interested in it
>>> rather than just tossing it. I can always provide more details to anyone
>>> that wants them.
>>> 
>>> Best regards,
>>> Paul Davis - K9MR
>>> 
>>> 
>>> 
>>> 
>>> ------------------------------
>>> 
>>> Message: 6
>>> Date: Fri, 1 Oct 2010 18:42:16 -0400
>>> From: "jmfranke" <jmfranke at cox.net>
>>> Subject: Re: [time-nuts] Possibly OT - Any interest in a vintage
>>> HP/Dymec DY-5842 VLF receiver?
>>> To: "Discussion of precise time and frequency measurement"
>>> <time-nuts at febo.com>
>>> Message-ID: <B7EA2D4AB6F34AB19DA25CFDC85A666A at Franke>
>>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>>> reply-type=original
>>> 
>>> I am very interested.  Do you have any images?
>>> 
>>> John  Franke WA4WDL
>>> Portsmouth, VA 23703
>>> 
>>> --------------------------------------------------
>>> From: "ziggy9" <ziggy9 at pumpkinbrook.com>
>>> Sent: Friday, October 01, 2010 6:34 PM
>>> To: <time-nuts at febo.com>
>>> Subject: [time-nuts] Possibly OT - Any interest in a vintage HP/Dymec
>>> DY-5842 VLF receiver?
>>> 
>>>> 
>>>> Fellow time-nuts:
>>>> I've got a circa 1964 DY-5842 VLF receiver. This is (was) operated in
>>>> conjunction with an external time interval counter to make a frequency
>>>> comparison. So you would select WWVL for example, and use that as your
>>>> primary standard for comparison to your local standard. It's got 5
>>>> crystals
>>>> in it: 16, 18, 19.8, 20, and 60 kHz (listed as GBR, NBA, NPM, WWVL,
> WWVB).
>>>> It works and I have the manual. The thing is, the interest in something
>>>> like this is bound to be a bit narrow, so I thought I'd mention it
> here.
>>>> 
>>>> So if there are any collectors, equipment museums, etc. that might be
>>>> interested in this, please let me know. I'm a bit sentimental about
> this
>>>> thing, it's sort of a bit of history, and from what I can tell,
> somewhat
>>>> rare (doesnt make it worth anything though :). Since it's a bit of a
>>>> curiosity, I'd like to pass it to someone that might be interested in
> it
>>>> rather than just tossing it. I can always provide more details to
> anyone
>>>> that wants them.
>>>> 
>>>> Best regards,
>>>> Paul Davis - K9MR
>>>> 
>>>> 
>>>> _______________________________________________
>>>> time-nuts mailing list -- time-nuts at febo.com
>>>> To unsubscribe, go to
>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>>> and follow the instructions there.
>>>> 
>>> 
>>> 
>>> 
>>> 
>>> ------------------------------
>>> 
>>> Message: 7
>>> Date: Fri, 01 Oct 2010 17:50:17 -0500
>>> From: Brian Kirby <kilodelta4foxmike at gmail.com>
>>> Subject: Re: [time-nuts] Possibly OT - Any interest in a vintage
>>> HP/Dymec DY-5842 VLF receiver?
>>> To: Discussion of precise time and frequency measurement
>>> <time-nuts at febo.com>
>>> Message-ID: <4CA665A9.1090908 at gmail.com>
>>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>> 
>>> You might consider contacting Dr. Ken Kuhn  --  kennathakuhn at gmail.com
>>> 
>>> check his HP museum at http://www.kennethkuhn.com/hpmuseum/
>>> 
>>> Brian Kirby KD4FM
>>> 
>>> 
>>> 
>>> On 10/1/2010 5:34 PM, ziggy9 wrote:
>>>> 
>>>> Fellow time-nuts:
>>>> I've got a circa 1964 DY-5842 VLF receiver. This is (was) operated in
>>>> conjunction with an external time interval counter to make a frequency
>>>> comparison. So you would select WWVL for example, and use that as your
>>>> primary standard for comparison to your local standard. It's got 5
> crystals
>>>> in it: 16, 18, 19.8, 20, and 60 kHz (listed as GBR, NBA, NPM, WWVL,
> WWVB).
>>>> It works and I have the manual. The thing is, the interest in something
>>>> like this is bound to be a bit narrow, so I thought I'd mention it
> here.
>>>> 
>>>> So if there are any collectors, equipment museums, etc. that might be
>>>> interested in this, please let me know. I'm a bit sentimental about
> this
>>>> thing, it's sort of a bit of history, and from what I can tell,
> somewhat
>>>> rare (doesnt make it worth anything though :). Since it's a bit of a
>>>> curiosity, I'd like to pass it to someone that might be interested in
> it
>>>> rather than just tossing it. I can always provide more details to
> anyone
>>>> that wants them.
>>>> 
>>>> Best regards,
>>>> Paul Davis - K9MR
>>>> 
>>>> 
>>>> _______________________________________________
>>>> time-nuts mailing list -- time-nuts at febo.com
>>>> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>>> and follow the instructions there.
>>>> 
>>> 
>> 
>> 
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> 
> 
> 
> 
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> 
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