[Lowfer] New Stuff(1)

[Zack Widup]

If I ever get on the 2200 or 630 meter bands, I plan on using the Airspy
Discovery HF+ SDR unit as a receiver. I hope to put up some sort of antenna
that will work. I have an AMRAD e-probe that is currently in storage. I
also have a 1 meter diameter loop with a LZ1AQ preamp that is also in
storage.

I have a transmitter I've sort of hodgepodged together from various
sources. It can put out 30 watts or so on these bands. The only problem is
that it will only do CW right now. I have not figured out how to modulate
it.

73, Zack W9SZ

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On Wed, Jan 29, 2025 at 11:50 AM stanw1le--- via Lowfer <
lowfer at mailman.qth.net> wrote:

>  Hello The Net:
> There certainly has been a fair amount of VLF-LF-MF ham radio items
> available over the years.Most are a labor of love and are well appreciated,
> but they do fade away, usually due to market forces.
> Keeping informed of new stuff can be time consuming and I find it hard to
> keep myself updated of new items.
> I recently came across this at:
> https://www.herostechnology.co.uk/pages/VLF-LF-MF_Converter.html
> This receive only up converter (5KHz-530 KHz) from the UK is available in
> 4 versions:a 4.0 to 4.5 2 MHz IF, with internal xtal based LOanother with
> the same IF but uses an external LO of 4.0 MHz you supply, allowing a
> LeoBodnar GPS/DO based ref,a 3.5 to 4.02 MHz IF with an internal xtal based
> LO and the newest unit with a internal TCXO for the LO.
> My tentative/initial plan is to get a unit with the external LO, use a
> Agilent 33120A synthesizer, and a SDR for RX.The SDR is already optimized
> for best noise figure (sensitivity) and best dynamic range in the ham
> bands,like the Hermes Lite 2 with external reference, and Thetis software
> for a PC.
> For the LeoBodnar GPS/DO based synthesizer:
> https://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=107&products_id=393&zenid=6ec4bcc64c77d19f3f97097bd62723b7
> ARR, Advanced Receiver Research, has a few preamps appropriate for this
> frequency rangehttps://www.advancedreceiver.com/page46.html
> All I need now are separate low loss band pass filters for 137 and 474
> KHz.And determine if the Hermes Lite 2 can TX on 137/474 KHz with a
> transverter output for further filtering and amplification.
>
> Stan,W1LE   FN41sr   Cape Cod
>
>
>
> ZZZZz
>
>     On Monday, January 27, 2025 at 06:49:14 PM EST, Facility 406 <
> facility_406 at bruteforcedevelopment.com> wrote:
>
>  "With a 9' whip running 1W on voice you would be very lucky to be heard
> across your driveway on the lowfer band!"
>
> If only I was in a position to find out...
>
> Couldn't afford the transceivers when they were available, and now that
> I can, the world has moved on.
>
> Kurt
>
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