[RFI] Loops for the National RF HFDF Vector Gun

Sam Morgan k5oai.sam at gmail.com
Sun Jul 10 18:35:42 PDT 2011

My National RF Vector Gun was shipped June 1, 2011

When I last spoke with Bob Decesari, WA9GDZ of Natonal RF, Inc.
He also confirmed they had yet to update their website.
But that the units that are now being shipped with 4 loops...

The loop frequencies are:
Loop AA 3.8-8 MHZ HF
Loop A   8-16 MHZ HF
Loop B  13-30 MHZ HF
Loop C  30-50 MHZ VHF

I agree with all Frank has said about the units, they are exceptional,
and I also use an external switchable 61db attenuator,
which makes hf signal dfing even easier with my receiver(s).

It may take a while to get your unit shipped,
as they are each hand built and custom tuned as they are created.

I had to wait a couple of months for mine to ship.

But there were extenuating circumstances,
a death in the family, other units were in line ahead of me.
Some of those other orders were to be shipped
to either Iraq or Afghanistan I forget which.

I figure my unit was not a matter of life and death,
So I had no problem waiting in line for mine, if you get my drift.

I'm not a professional like Frank, but I am 110% satisfied with my unit!

GB & 73
Sam Morgan

On 7/10/2011 8:03 PM, Frank N. Haas KB4T wrote:
> A follow-up to my earlier note regarding the subject active loop antenna.
> I checked the National RF (NRF) web site and the details on the loop
> antennas available for the device is not up to date.
> The original version of the Vector Gun came with 3 loop antennas that
> covered the spectrum between 8 MHz and 50 MHz. When I ordered my
> Vector Gun this year, I was able to purchase a 4th antenna that covers
> 3.8 MHz  to 8 MHz. I agreed to report to National RF the results of my
> work with the 4th antenna. The lowest frequency antenna worked quite
> well for me and that's what I reported to NRF.
> NRF told me they would modify the antenna offerings to once again
> supply 3 antennas but the spectrum coverage would start at 3.8 MHz.
> I've heard that since my early success reports with the Vector Gun,
> NRF has been doing its best to keep up with the orders. Each kit is
> custom made when ordered so there is a delay in actually getting the
> package. If anyone on this list has received a Vector Gun kit since
> April 2011, perhaps they could advise what antennas came in their kit.
> So to summarize:
> 1.  The National RF HFDF Vector Gun is an effective DFing device for
> the high frequencies from 3.8 MHz to 50 MHz provided you use it with a
> proper sensitivity-controlled receiver.
> 2.  There may be a delay of possibly weeks before one's Vector Gun
> will ship since each one is usually built when the order comes in.
> 3.  The effective useful frequency range of the current version of the
> Vector Gun is 3.8 to 50 MHz using one of 3 or 4 supplied loop antennas
> for the base unit.
> 4.  The National RF web site is not fully up to date likely because
> the small team at NRF is busier than a one-legged man in a
> butt-kicking contest building units to fill orders!
> Once again, I'll be happy to answer any questions.
> 73,
> Frank N. Haas KB4T
> Utility Interference Investigator
> Florida
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi

More information about the RFI mailing list