[MRCG] Looking for medium power VLF CW transmitter

[Steve]

Drool. That TMC sure would look nice in transmitter row! But the TAJ
would look even better next to the pair of PW-15's we have on the first 
floor.

The reality is we have restrictions on what we are allowed to do by the park
service. Adding a big, non-original piece of equipment would cause problems.

A solid state transmitter might be the most practical way to go as it could
be hidden in one of the vintage transmitters. Modern techniques like using 
torroids
and switchers would keep the size to a minimum.
                         Steve

----- Original Message ----- 
From: "Nick England" <navy.radio at gmail.com>
To: "West Coast Military Radio Collectors Group" <mrcg at mailman.qth.net>
Sent: Friday, March 04, 2016 5:28 AM
Subject: Re: [MRCG] Looking for medium power VLF CW transmitter


> 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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