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

[Ed Cole]

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
>