[Elecraft] K3/KX3 MF/LF Transverter

[Bill Harris]

Wayne:
An Elecraft Transverter for below 510 kHz would be well received, world wide.  I  guess the number of participants would be rather low to start with but interest would increase with the availability of such an item.  A poll of the amateur market would give a good indication of interest.  If the numbers aren't there to warrant such venture, then maybe one of the small kit-providers might pick up the banner.
Presently, I see two potential customers; KL7UW and myself.  How's that for a start? ;)
73
de Bill-w7kxb
. .




> From: n6kr at elecraft.com
> To: kl7uw at acsalaska.net
> Date: Sun, 8 Jul 2012 08:49:25 -0700
> CC: Elecraft at mailman.qth.net
> Subject: Re: [Elecraft] KX3 Receive Performance Below 1500 kHz
> 
> Hi Ed,
> 
> The KX3's spec also says, "Note: Sensitivity decreases gradually below  
> 1.5 MHz due to protective high-pass filtering...." We did this to  
> ensure that the PIN diodes in the T/R switch are protected. A fairly  
> large amount of attenuation is required by the time you get down to  
> 500 kHz or lower.
> 
> We did do some transmit tests in the 470 kHz range. We can easily get  
> +10 or possibly +20 dBm output at these frequencies, but you'd need an  
> external filter/amplifier to obtain useful transmit power output.  
> Given that, I would think that an external receiving converter that  
> shifted the 0-1 MHz range up to 7-8 MHz on the KX3 would also be a  
> good solution. The KX3 has transverter bands that can be set up for  
> this application, allowing the VFO to read correctly when on this  
> band. The ACC2 GPIO pin could be used to turn the external converter  
> on/off.
> 
> The K3 has the same high-pass filtering in the main antenna path as  
> the KX3. But the K3 also provides a way to bypass the filter, by using  
> the KXV3's RX ANT input (or the XVTR input).
> 
> 73,
> Wayne
> N6KR
> 
>