[Moon] ALL 9cm orperators

[charlie at sucklingfamily.free-online.co.uk]

Hi Charlie

Re 1: I can only work on 3400.

Re 2: imho, not possible.

73

Charlie

> Hello,  A couple of questions to  all 9cm  operators:
>
>
>
> 1.	Are any /  many of you are able to adjust  LO frequencies to be able
> to work VK3NX on 3392 MHz  direct   Tx  and Rx ?
>
>
>
> 2.	What filter designs are possible to pass 3398.100 MHz (with minimal
> loss)   but attenuate  3400MHz and above  by 30-40 dB or more ?
>
>
>
>
>
> A little  while ago I had to migrate all 9cm operation to 3398 MHz and
> have
> worked many of you there direct or split freq with 3400 MHz
>
> I now have commercial spread spectrum transmitters on  3400 MHz and above
> nearby  and I can no longer operate on 3398.100  due to a BIG  increase in
> my noise floor on 3398.    I  either  have  to  find a filter solution, (
> ALL SUGGESTIONS  WELCOME PLEASE) or migrate down a few more MHz  to say
> 3392.100 MHz where I have checked  my  background noise is "normal".
>
>
>
> ( I recently have had the same problem  on 13cm  due to heavy commercial
> use
> on 2304MHz and above   and an interdigital filter helped...  I  am  able
> to
> still work on 13cm but ONLY  2300.100 +/-    ( not 2301.950))
>
>
>
> 73
>
> Charlie
>
> VK3NX
>
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