[Milsurplus] VLF non directional beacon hunting
B. Smith
smithab11 at comcast.net
Sun Sep 1 11:00:31 EDT 2019
A home brew variometer coil using PVC pipe as a coil form can be
fabricated to match a random wire antenna and enhance your reception.
Details can be found at:
http://k4che.com/R390LF/R390LFVar.htm
k4che
On 9/1/2019 9:19 AM, John Watkins wrote:
> Just got around to setting my TS-930 back up, never have run the Rx.
> Down to it’s lowest frequency, and was surprised that it goes all the
> way to 100 KHz. Picked up 5 or 6 NDBs here in Seguin, TX. With no
> real problem. Guess It wouldn’t hurt to make a real VLF antenna, was
> using my 6-80 vertical. Know the 930 isn’t a mil radio, but nice to
> know What I can do with it. Should have done this years ago.
>
> John WD5ENU
>
> On Sun, Aug 25, 2019 at 22:01 mike christie via Milsurplus
> <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net>> wrote:
>
> Dave
> Over the last few early mornings I have manage to confirm the
> following
> NDB's
> RND 363 Millville NJ 50 watts
> ADG 278 Adrian MI
> DIW 198 Dixon NC
> MIQ ? Not sure where this is or the correct frequency I think the
> frequency is close to 351 which is what Culpeper's frequency is.
> I'll listen
> some more
> Have heard Ft Belvoir or DC
> RNB 351 Culpeper Va.
>
> Someone mention using a Frequency Counter at the Detector what
> value of
> capacitor was used and where in the Detector stage was the tap.
>
> Thanks
> Mike
> W1ZFB
> -----Original Message-----
> From: milsurplus-bounces at mailman.qth.net
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> [mailto:milsurplus-bounces at mailman.qth.net
> <mailto:milsurplus-bounces at mailman.qth.net>] On Behalf Of
> milsurplus-request at mailman.qth.net
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> Sent: Saturday, August 17, 2019 10:11 AM
> To: milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net>
> Subject: Milsurplus Digest, Vol 184, Issue 69
>
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> Today's Topics:
>
> 1. Re: 800 Cycle AC Meter? (howard holden)
> 2. CW VLF Frequency ID (mike christie)
> 3. Re: CW VLF Frequency ID (David Stinson)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 17 Aug 2019 07:34:33 +0000
> From: howard holden <holden7471 at msn.com <mailto:holden7471 at msn.com>>
> To: David Stinson <arc5 at ix.netcom.com <mailto:arc5 at ix.netcom.com>>
> Cc: "Boatanchors at mailman" <boatanchors at mailman.qth.net
> <mailto:boatanchors at mailman.qth.net>>,
> "milsurplus at mailman" <milsurplus at mailman.qth.net
> <mailto:milsurplus at mailman.qth.net>>
> Subject: Re: [Milsurplus] 800 Cycle AC Meter?
> Message-ID:
>
> <MN2PR13MB36785A137359B824CB111926C4AE0 at MN2PR13MB3678.namprd13.prod.outlook.
> com>
>
> Content-Type: text/plain; charset="utf-8"
>
> All I can tell you is the one on my GO-9 has been working for 10+
> years now
> on 60 cycles almost daily and sometimes on for days at a time with
> no ill
> effects. Never gave that a thought. I?ll have to take its
> temperature, maybe
> tomorrow. I did compare it once to my DVM, and the readings were quite
> close.
>
> 73, Howie WB2AWQ
>
> Sent from my iPhone
>
> > On Aug 16, 2019, at 21:39, David Stinson <arc5 at ix.netcom.com
> <mailto:arc5 at ix.netcom.com>> wrote:
> >
> > Given an AC voltmeter, FS 15VAC.
> > The meter face specifies 600-800 cycles.
> > Is it reasonable to assume that there is less iron in this
> meter, vs. one
> designed for 60 cycles?
> > If so, and the meter were used at 60 cycles, would it just read
> incorrectly,
> > or would the movement overheat?
> >
> > TNX 73 Dave S.
> >
> >
> >
> > ---
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> ------------------------------
>
> Message: 2
> Date: Sat, 17 Aug 2019 08:13:22 -0400
> From: "mike christie" <MZFB at aol.com <mailto:MZFB at aol.com>>
> To: <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net>>
> Subject: [Milsurplus] CW VLF Frequency ID
> Message-ID: <[email protected] <http://aol.com>>
> Content-Type: text/plain; charset="us-ascii"
>
> Good Morning to all
>
> I got my RAK 7 running last night and was tuning around and found a
> continuous CW signal around 233 Kc. (Band 5 on the RAK) I listen
> for a
> long time for a station ID but nothing came through. The station
> continually sends Z F E Z . Anybody got an idea who this station
> is and
> what it's purpose is? I'm in Fredericksburg, Va. listening to this.
>
> I tried using one of the SDR sites to see if I could find it on
> there for a
> better frequency but couldn't find it on the one SDR site I tried.
>
>
>
> Thanks
>
> Mike
>
> W1ZFB
>
>
>
>
>
>
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> ------------------------------
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> Message: 3
> Date: Sat, 17 Aug 2019 09:10:50 -0500
> From: David Stinson <arc5 at ix.netcom.com <mailto:arc5 at ix.netcom.com>>
> To: milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] CW VLF Frequency ID
> Message-ID: <2738e4fb-d3b6-980c-2792-ea5bda25676a at ix.netcom.com
> <mailto:2738e4fb-d3b6-980c-2792-ea5bda25676a at ix.netcom.com>>
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>
> Good Morning.
> Your local Fredricksburg Non-Directional Beacon, used for aircraft
> navigation, is on 237 KC and will continuously send the callsign
> EZF.??
> Try running the RAK just below regeneration and see what the signal's
> modulation sounds like on AM.
> There are still a lot of these MF-LF NDB transmitters around- many
> people enjoy chasing them as DX targets- but they are dropping
> fast as
> we become more and more reliant on the fragile web of GPS navigation.
>
> Look for these NDBs in your area, assuming they are still on the air:
> 351? MSQ? Culpeper
> 382? IQK Louisa
> 396 APH Ft. A.P. Hill, God rest him.
> 400 NHK Patuxent River
> 223 DA? Ft. Belvoir
> 332 DC Washingtoilet
>
> You can find a great map of NDBs with locations and IDs at:
> http://www.fivegulf.com/ndb/
>
> If you decide to chase NDBs, you will need something better than a
> random wire or an HF dipole.? Such antennas pick up common-mode and
> other noise, which will bury most signals.?? On LF, low-noise is much
> more important than sensitivity.?? A simple ferrite loop antenna with
> amplifier will allow you to null-out local noise sources.? My
> first "dx"
> reception on 630 meters (473 KC), the receive antenna was a
> Palamar LA-1
> ferrite loop- a little box and coil sitting on the desk.?? Recently
> built a big open loop, 5 feet on a side in prep for 630 meter
> operation
> this fall.
>
> GL OM ES 73 DE Dave AB5S
>
> P.S. Many people use "E-Field Probes" and think they are the best
> thing
> since sliced bread.? I've been working with great success on LF since
> 1983.? E-field probes are "good" if one has compared them only to
> random
> wires or HF dipoles, just as a man dying in the desert from thirst
> would
> think water from a pig-wallow was "good." E-Field probes are noise
> magnets and will bury signals in the hash.? If these folks ever
> used a
> well-designed amplified loop, they'd throw rocks at E-Field probes.
>
> On 8/17/2019 7:13 AM, mike christie via Milsurplus wrote:
> >
> > Good Morning to all
> >
> > I got my RAK 7 running last night and was tuning around and found a
> > continuous CW signal around 233 Kc. ?(Band 5 on the RAK) ?I
> listen for
> > a long time for a station ID but nothing came through.? The station
> > continually sends Z F E Z .? Anybody got an idea who this
> station is
> > and what it?s purpose is?? I?m in Fredericksburg, Va. listening
> to this.
> >
> > I tried using one of the SDR sites to see if I could find it on
> there
> > for a better frequency but couldn?t find it on the one SDR site
> ?I tried.
> >
> >
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
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