[hpsdr] Hermes 144mhz

[Bent Andersen]

Hi Kjell

my Idea it to make a remote EME/tropo station out of the city here, and if
I can make a
small pcb board that containe 2 small relays that can get the signal out to
a small rf-driver and a small LNA
and that way do the 144mhz.... and if I need to go on HF...I just switch
the 2 relays.

just look at *http://www.hamsdr.com/dnld.aspx?id=1423
<http://www.hamsdr.com/dnld.aspx?id=1423>  *at page 3/4

73' Bent


>Hi Bent.

>Do you plan to use Hermes only for 144 MHz or are you going to use it on
>HF also?
>
>If you mean to use it only on 2 meter, it should be possible to do the
>modifications both on the TX and RX. I have modified one of my Hermes
>boards so that I can take out the signal after FL1 so that I can use
>another amplifier but as the signal from T1 is unbalanced, the track
>between T1 and FL1 can be cut and connected to a SMB soldered and placed
>beside FL1.
>
>On the RX side you can do a similar modification. Cut the track between
>FL6 and T4 and connect T4 to another SMB soldered to the GND placed beside
>FL6. Then recalculate the L/C filter between U11 and U10 for 130 MHz. The
>bandwidth of U11 and T4 is very high so that should not be any problem.
>
>I am tempted to try this myself!
>
>73, Kjell
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