Saw the writeup in QST and immediately noticed the receive two-tone,
third-order IMD at 2 kHz spacing is 60 dB and at 75 kHz spacing is only 74 dB!
Good luck with that if you've got strong signals at your location.
Jay W1VD WD2XNS WE2XGR/2
----- Original Message -----
From: N1BUG <[email protected]>
Reply-To: <[email protected]>
To: <[email protected]>
Sent: 7/6/2018 7:50:56 PM
Subject: Re: LF: RE: Simple transverter for 472kHz
________________________________________________________________________________
Of course it could be the transceiver drifting, but curiously all I
have been aware of so far moved in the same direction and
approximately the same amount... who knows.
Paul
On 07/06/2018 06:09 PM, N1BUG wrote:
> 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 <[email protected]
>> <mailto:[email protected]>> 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 <[email protected]
>> <mailto:[email protected]>> 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
>> <[email protected] <mailto:[email protected]>>
>> wrote:
>>
>> Ouch! $660 US dollars plus shipping - that is a /lot/!
>>
>> On 8 February 2018 at 13:19, Clemens Paul <[email protected]
>> <mailto:[email protected]>> 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
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