Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: RE: Simple transverter for 472kHz

To: "[email protected]" <[email protected]>
Subject: Re: LF: RE: Simple transverter for 472kHz
From: "[email protected]" <[email protected]>
Date: Fri, 6 Jul 2018 21:45:49 -0400
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20161114; t=1530927951; bh=xSwSsvkaydwlt6a+vQH29Fu+odrNfUh3broYcInF/is=; h=Received:Received:From:Subject:To:Content-Type:Date:Message-ID; b=nLmkR4MWQa2Y4wxIVkNRlGlTNW+M7pEcROsJW95YzxLgI9BInMqYMZr+lPs1YJaD2 xrZMpU5n8T1KVsbkGgsAuktLkh3Pxs3c74VTTNTa3Cndt4Ei9MBvzSM4/slDIFMozw 0nL9XEursKhLwG5F9iOHIi6Ng7fRwC6yvMPqbocMY44IPc0IRWQWgWu6c0EWkGc3lx jepahd4SM957/PzAZglbACAe6cs72zxYDPwGPFTfrFD0kZKY2+0hLPkc00zTrWr3JB hSJrCNDxYbrwbxbumXILSffqERjcDdG9MMffdyQKkzURSLgtFsMy+y5Y8D0xHNiQVs DsAI5h6AAhRmA==
In-reply-to: <[email protected]>
References: <CAHAQVWMte_9GEF90SMu09atqVUWzKHh-Wt+cxjkHH+AcR4ggYQ@mail.gmail.com> <95F978822451403DBC46B4D8DE826DF3@Clemens0811> <CAHAQVWNyPNOf-eY1GtAcQ+b0HKu+mv=DdaZStS8vWM9LZVfPRw@mail.gmail.com> <CAGZ4oo942D_pYYrBXbcLGhVtbBMWQaYTrTcLZQ+ak3BU5LAxtQ@mail.gmail.com> <CANi3vvs+9NwNp6sAKbvkRFYsUS_q5jjaBb6xGG0Z9pih4LALAg@mail.gmail.com> <CAA8k23R7JurcyPGnRk0Q0VP+24XmiFwJLk-HMCDZXn6EFaVeYQ@mail.gmail.com> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: OEClassic/2.9 (Win7.7601; P; 2018-07-03)
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


<Prev in Thread] Current Thread [Next in Thread>