[time-nuts] 60kHz Loop antenna

Alan Melia alan.melia at btinternet.com
Sun Oct 3 05:03:02 EDT 2010


Thanks Dick, Ok with interference that close it would help. Shielding doesnt
always provide much at these frequencies and can reduce the Q of the loop.

Best Wishes
Alan G3NYK

----- Original Message ----- 
From: "Dick Moore" <richiem at hughes.net>
To: <time-nuts at febo.com>
Sent: Sunday, October 03, 2010 6:56 AM
Subject: Re: [time-nuts] 60kHz Loop antenna


> 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.
> >
> >
> >
> >
> > ------------------------------
> >
> > _______________________________________________
> > time-nuts mailing list
> > time-nuts at febo.com
> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >
> > End of time-nuts Digest, Vol 75, Issue 4
> > ****************************************
>
>
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