[Elecraft] KX3 direct conversion system

[須崎 純一]

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