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

[John Langridge]

Amen Ed...it would fit the bill well and I think its pretty easily
duplicated by someone not wanting to spend the cash for the commercial
model.  The design looks similar to what WA3ETD put together for a
trip to WVA pre-pandemic...  Again the goal with this product seems to
be to offer something for a premium cost for those that can't / wont'
build.

I think they indicate that a broadband matching transformer is part of
the deal, presumably something that is tapable..

73!

John..




On 1/11/22, Ed Cole <kl7uw at acsalaska.net> wrote:
> John,
>
> This may have application for portable use, as in emergency comm set
> ups.  I gather the loading coil is fixed so tuning is by top hat and
> will also be subject to radials (number and length).
>
> This about the same height as many commercial marine HF whips which use
> a ATU for tuning (typ 2-16 MHz).  30-ohm impedance will need a tuner
> (additional loading coil) to match 50-ohms.  I guess broadcast
> transmitters have output tuning circuits.
>
> I sure some hams can duplicate this by home building (will need EZNEC to
> model to find impedance parameters; that is how I designed my base
> loaded inverted-L).
>
> 73, Ed - KL7UW
>
> On 1/11/2022 4:02 AM, John Langridge 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
>> ______________________________________________________________
>> 600MRG mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/600mrg
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:600MRG at mailman.qth.net
>>
>> This list hosted by: https://www.qsl.net
>> Please help support this email list: https://www.qsl.net/donate.html
>>
> ______________________________________________________________
> 600MRG mailing list
> Home: http://mailman.qth.net/mailman/listinfo/600mrg
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:600MRG at mailman.qth.net
>
> This list hosted by: https://www.qsl.net
> Please help support this email list: https://www.qsl.net/donate.html
>