[MRCG] Looking for medium power VLF CW transmitter

[Nick England]

Ahh, now here's just what you need - a TMC GPT-10KLF - 10kw PEP from
5kc-500kc. (can also be used as a sonar driver!)
http://www.tmchistory.org/tmc_ssb_cats/ssb_db/tmc.tb_1015.pdf

Unfortunately, I have no idea where you could find one....
You could take a regular HF GPT-10K and convert it I suppose - K4OZY has
the TMC factory drawings, etc - www.tmchistory.org

Since you say you have plenty of space and power, how about an FRT-72?
(100kw PEP, 50kc-150kc). Three of these were removed from USN service and
sent to WWVB in Boulder. Maybe they now have one surplus to needs....
http://www.navy-radio.com/xmtrs/frt72-11.JPG
or the B version
http://www.navy-radio.com/xmtrs/vlf/frt72b-1103-01.JPG

Of course if you aren't sticking to vintage gear, you could probably stick
a tank circuit on a shoebox-sized 5v 300a switching power supply and be all
set......

cheers,
Nick England K4NYW
www.navy-radio.com

On Thu, Mar 3, 2016 at 8:38 PM, Steve <zarco at sonic.net> wrote:

> Yes, KPH had two frequencies in the VLF marine band.
> Richard Dillman is the expert and the one that came to me with the
> idea of getting something back on during our regular Saturday ops.
> At this point its more of a dream than anything else. If we either
> find a transmitter or decide to do some serious mods to something
> we have on hand ( a BIG project) that would be only part of the project.
> The other two are the antenna matching nextwork and of course the
> antenna itself.
>
> Its a complex project to say the least but it was approved at the last
> board meeting. My initial thoughts are we should shoot for a transmitter
> of at least 1 KW because antenna efficiency will be so poor.
>                                  Steve
>
> ----- Original Message ----- From: "Geoff Fors" <Geoff at wb6nvh.com>
> To: <mrcg at mailman.qth.net>
> Sent: Thursday, March 03, 2016 1:14 PM
> Subject: [MRCG] Looking for medium power VLF CW transmitter
>
>
> Steve, I haven't seen anything about this in the occasional MRHS mailings.
>> Can you fill us in with more details?   What will be used as the antenna,
>> and was this an old KPH frequency at some time?
>>
>> Geoff
>> WB6NVH
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