[Elecraft] VLF/LF Converters

[Scott Prather]

Don: It's certainly possible to change my VLF converter such that a 7 MHz IF
is used instead, but I brought this up primarily because the addition of
these virtual bands shouldn't be a tremendous effort in SW. But, of course,
such things are always simple for the person who doesn't have to actually do
the work. And the inclusion of such a band could open up the floodgates for
special band requests.

To standardize things a bit, I recommend that Elecraft consider adding the
10 MHz band as an IF in the transverter menu. I can easily move my VLF
converter to a 10 MHz IF and the LO can be supplied by my local H/P
frequency standard.

Scott
N7NB

-----Original Message-----
From: Don Wilhelm [mailto:w3fpr at embarqmail.com] 
Sent: Thursday, August 28, 2008 1:46 PM
To: Scott Prather
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] VLF/LF Converters

Scott,

Right now, the K3 XVx RF can be set to most any frequency (MHz 
increment) from 0 to 999 - but unfortunately the IF frequency is 
currently limited to 7, 14, 21, 28, and 50 MHz.

If we could convince Wayne and Eric to support the 10 MHz band as an IF, 
that would work for the 10 MHz IF used in the Jackson Harbor Press kit 
that has received some recent 'press' here.  I suppose a 4 MHz If might 
be possible too - but that may depend on how many users there may be.
What is the chance that you could change the mixer crystal to give your 
VLF converter a 7 MHz IF?  If it has tuned circuits at the output, those 
would have to be changed to the new IF as well, but it certainly should 
not be a daunting task, perhaps just a few toroids to wind.

I don't know how well any of this works because I have not tried it, but 
it seems feasible looking at the K3 transverter interface menus.

73,
Don W3FPR

Scott Prather wrote:
> Regarding the VLF converters, one question I have for the SW folks at
> Elecraft is whether they could add a transverter "band" to support these
> unique receive converter IF frequencies. For example, I have a VLF
converter
> that I've used for years that was designed for a 4 MHz IF. 
> 
> I realize that I can simply tune 4 to 4.5 MHz and mentally ignore the 4
MHz
> portion of the display, but it would be ideal if I could define a new
> "transverter" band where 4 to 4.5 MHz is displayed on the front panel as
> 0-500 kHz.
> 
> Scott
> N7NB
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Mike
> Sent: Thursday, August 28, 2008 10:58 AM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] VLF/LF Converters
> 
> Interesting Ron.....and,as a matter of interest, on the 'Night of 
> Nights', I've copied KPH, on 426kHz, here in the far north of NZ's North 
> Island, for several years now.
> 73 de Mike, zl1mh.
> 
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