[600MRG] "The Lowdown Amateur Radio Antenna for 630 Meters Model 630.PD"

[John Langridge]

Here is the reference I could not find from ON7YD:
http://www.strobbe.eu/on7yd/136ant/

Again its specific to 2200m but as a generalization, a vertical that
works on 137 likely has better specs on 472 in terms of Rr, feed point
impedance, etc...

73!

John..



On 1/11/22, Greg KF5N <greg.electricity at gmail.com> wrote:
> I like the design as I could use it even in my relatively small back yard.
>
> The availability of a turnkey antenna and other gear is good, but I'm not
> even sure there is that much easily available reference material if you
> want to build your own.
> I recently ordered the 2022 ARRL Handbook, and found only one page on LF
> propagation.  Did I miss something, or is there no other information on the
> ham LF allocations in the latest handbook?
>
> Let's say I was a newbie interested in trying out 630 meters.  Where would
> I go to find construction details for an antenna equivalent to this
> commercial offering?
> Long ago (1980s) I built and operated a Lowfer Beacon.  There was the
> series of books by Ken Cornell, and a couple of enthusiast periodicals on
> Lowfer and other LF topics.
> Lots of antenna topics and construction articles in those publications.
> Is there something equivalent to this today for 630 meters?
>
> 73 Greg KF5N
>
> On Tue, Jan 11, 2022 at 8:03 AM John Langridge <kb5njd at gmail.com> wrote:
>
>> Good morning,
>>
>> Jamie, N2VJ, reported this morning on SLACK that a US-based company is
>> producing a portable, turnkey 630-meter vertical antenna system.
>> Originally developed for BC medium wave AM as an emergency continuity
>> system, this model has been modified for 472-479 kHz.  You can see the
>> specs here:  https://theradiosource.com/products/antenna-630pd.htm
>>
>> Jamie indicated that the company is probably testing the market and
>> the price may be somewhere in the $890 USD range.  While that may seem
>> pricey to some, there are a lot of people out there still waiting for
>> a turnkey option and engineering and materials are expensive these
>> days.  Yes you can build this stuff for a LOT cheaper but there are a
>> lot of hams today that can't or won't so here is an option to fill the
>> void.
>>
>> Have a look and show some interest as doing so often drives product
>> development and innovation.
>>
>> Jamie explicitly noted that he is not endorsing this product and he
>> has no financial interest.
>>
>> 73,
>>
>> John KB5NJD
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>