[Moon-net] 9cm EME progress + Request

[Mark GM4ISM]

Hi All,
my 9cm plans are progressing well. The feed is built and tested (with a flare not a choke), and all is good.  Return losses and Xpolar losses all better than 28dB .... some photos on the 9cm page of my website.
Started thinking on the 3456MHz issue.
some years ago I think recall a design for a 9cm filter in WG16 , using semi-rigid as the resonators and caps.  does anyone have the dimensions or such a filter.
Any suggestions for an easily constructed alternative with good rejection 100MHz away (20dB min) will give me reasonable image rejection for a pre-converter to allow me to hear 3456MHz????
Or anyone got a spare 3456 filter of reasonable size spare for a reasonable price?? I have some of the big Ionica filters, but the are rather OTT physically, especially with a 7/16 input connector!

I have been looking at my PA options and I may well run up a Toshiba amplifier instead of the Matra, so expect 40+ W at the feed

Look forward to getting in for the 9cm EME weekend!
Regards
Mark GM4ISM
www.dc2light.co.uk
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