VK3NX
Australian Amateur Radio Station
(13cm X-Band Switching)
A number of schemes have been published for trying to cover the full "13cm" EME
spectrum.  A scheme of switchable LO's and down-converters have been described in
"DUBUS" by JA4BLC.

In VK  we are licensed to Tx on 2300-2302  and on 2400 -2450. Most terrestrial activity
occurs at 2400MHz and my first 13cm transverter was for this band.  In looking into
adding 13cm EME to my station capabilities it was soon realised that many NA and Eu
stations do not yet have a 2400MHz Rx capability and as I had to build a 2304-2320 MHz
receiver the choice was obvious to utilise the small VK segment at 2300 -2302.  This way
many stations whom can listen on the NA allocation of 2304  might easily listen to 2300 -
2302.  As such a full Rx / Tx  transverter was built for 2300-2302.

With most stations having IF receivers that can tune down to 142-144 MHz the possibility
of QSO's seemed greater with this arrangement.

Having now operated in a couple of contest weekends on 13 cm EME it has become
obvious that the multiple X-Band requirements makes this band a CHALLENGE!

As of  April 2008,  there are presently only 3 VK stations that I know of that are QRV on
13cm EME:  VK4AFL,  VK7MO  and myself.  We have established the 2301.950 - 2302.000  
segment of the band as the EME segment as this gives most other operators a chance to
hear us without having to modify their systems.

AS OF APRIL 2008 I PLAN TO OPERATE X-BAND IN THE FOLLOWING
MANNER.......  BUT ONLY FOR RANDOM QSO'S !!!!!

I will always Tx  2301.950  +/-  QRM     and I will Always Rx on :
                                
                                2301.950 echo QRG
                                2304.050 +/-  equivalent doppler
                                2320.050  +/- equivalent doppler

WHEN RESPONDING TO A CQ ON 2304 or 2320 I WILL ALWAYS TX
ON 2301.950 +/- Doppler.

If there are any suggestions as to a better scheme...please let me
know!  I would appreciate your input.


ANY SKEDS WILL HAVE RX AND TX QRG's  WELL DOCUMENTED.

I hope by conforming to the above  as of April 2008.