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Message-ID: <50f24ef2-2d1d-b537-7d66-e6d12ecf8cc3@n1bug.com>
Date: Fri, 6 Jul 2018 18:09:02 -0400
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Subject: Re: LF: RE: Simple transverter for 472kHz
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Reply-To: rsgb_lf_group@blacksheep.org

My only comment is that the ones I have heard seem to consistently
drift 1 to 2 Hz during a 2 minute WSPR transmission. So if you
wanted to use one for something like slow DFCW on LF, you would
probably have to do some work to stabilize it.

Paul


On 07/06/2018 05:48 PM, Andy Talbot wrote:
> At that price, and that PA efficiency (15 amps at 13.8V for 50W out
> - very low) you'd have thought they could have dual-banded it,
> 137kHz and 475kHz
> A broadband linear PA, 100 - 500kHz is hardly rocket science
> 
> Andy
> www.g4jnt.com <http://www.g4jnt.com>
> 
> 
> On 6 July 2018 at 22:15, M0FMT <peteg8fmt@gmail.com
> <mailto:peteg8fmt@gmail.com>> wrote:
> 
>     In the UK both the National Gov TAX and the Local Gov TAX makes
>     sure  the concept of Disposable Cash  cannot happen.
> 
>     73 petefmt
> 
>     On Thu, Feb 8, 2018 at 2:12 PM, John Langridge <kb5njd@gmail.com
>     <mailto:kb5njd@gmail.com>> wrote:
> 
>         >Ouch!  $660 US dollars plus shipping - that is a /lot/!
> 
>         Its a very solid unit, a true transverter, 50w out
>         continuous with 90-100w intermittent duty with increased PA
>         voltage and a receive section that is like no other.  The
>         roofing filters make a huge difference and it has made the
>         difference between hearing someone and not on many occasions.
> 
>         I highly recommend if you have some disposable cash...
> 
>         73!
> 
>         John KB5NJD..
> 
> 
> 
> 
>         On Thu, Feb 8, 2018 at 7:53 AM, Roger Lapthorn
>         <rogerlapthorn@gmail.com <mailto:rogerlapthorn@gmail.com>>
>         wrote:
> 
>             Ouch!  $660 US dollars plus shipping - that is a /lot/!
> 
>             On 8 February 2018 at 13:19, Clemens Paul <cpaul@gmx.net
>             <mailto:cpaul@gmx.net>> wrote:
> 
>                 >If you want a simple way to get started on 472kHz
>                 maybe my
>                 >transverter can help? This appeared in QST and in
>                 the book "LF Today".
> 
>                 Here is a ready to go transverter from an Australian
>                 dealer.
>                 http://www.monitorsensors.com/ham-radio/630m-transverter
>                 <http://www.monitorsensors.com/ham-radio/630m-transverter>
>                 Not cheap,though.
>                 See also
>                 http://www.monitorsensors.com/support/news/longest-630m-qso
>                 <http://www.monitorsensors.com/support/news/longest-630m-qso>
> 
>                 73
>                 Clemens
>                 DL4RAJ