[Elecraft] KX1 improvements

[Karl Larsen]

    I have been downloading PDF files explaining the way H-mode Mixers 
work, and then the data sheet for the Texas Instruments SN74CBT3125 
large scale integrated chip in surface mount size. The H-mode Mixer is a 
double balanced Mixer that uses a Quad-FET bus switch as the non-linear 
part of the Mixer.

    The TI chip uses 5 volts at 18 mA in a Mixer configuration. I need 
to study all the information I have now on my computer and then write up 
an actual proposed receiver mixer for the KX1 that will knock out nearly 
all third order image signals.

    This is not needed in the USA, but it is critical to KX1 use on 40 
meters in Europe.