[Elecraft] KX3 direct conversion system

[Matt Maguire]

If the leakage is troublesome, you can try enabling the isolation amplifier (menu setting RX ISO)

73, Matt VK2ACL.


On 16/08/2012, at 1:02 AM, 須崎 純一 <jsusaki at hotmail.com> wrote:

> 
> Hi all,
> I built KX3 kit (S/N830) up last week after fixing some errors.
> As soon as trying some functions, I found it's really a direct
> conversion system.  A weak leaked signal was observed with another
> receiver just on the watching frequency.
> In my boyhood, I built Mizuho DC-701 which was a copy model of Heathkit
> HW-7.   DC-701 also adopted direct conversion system and my local
> station could detect my receiving point.   The leaked signal from KX3 is
> not so strong as that of DC-701 and almost no problem.
> Direct conversion with DSP system will be possibly adopted in higher
> class transceiver.
> DC on 2m is interesting, however, challenging.
> So transverter is reasonable solution and I'm expecting the module again.
> Many thanks for proposing the innovated equipment.
> 
> The block diagram shows the transmission system is also 'direct conversion'.
> The local oscillating frequency seems to be basically equal to the
> transmission frequency.
> Is it correct?
> 
> Just one more twitting.   The optional microphone looks something a
> little cheap, because it's same as that of Chinese kit KN7Qa.
> 
> Jun, JI1TLL
> 		 	   		  
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