[hpsdr] Alex RF Bandpass Filters

[Dick Faust]

Hi Tony

The schematics are  fairly clear in descriptions.  The Boards are 
presently 2.5 x 3.9" each One for TX and one for RX.  The TX board has 
the T/R switch, SWR Bridge, 6M  LPF along with bypass relays and the 
decoder circuitry to use an external set of TX LPF filters like the 
Packer.  Any filter set that activate the switching on a low [0V] 
signal.  The RX board has the 6M preamp, the 10db & 20db attenuators, 
bypass relays and the decoder circuitry.

I have found a netlister for the ExpressPCB software and may combine 
into only one board.
Info on my Munin2 page http://k9ivb.net/munin2/ or the document link below

Schematics, board layout and parts list here:
http://k9ivb.net/munin2/Alternate_Alex_Interface_V6.pdf

73, Dick K9IVB


Tony Hagen wrote:
> Hi Dick,
>
> Curious to know the development further, keep posting in the forum. 
> Otherwise, could you please describe in short the difference between 
> Alex and Alternate Alex
>
> 73s
>
> Tony
>
>
> On Tue, Jun 4, 2013 at 3:53 AM, Dick Faust <k9ivb at cox.net 
> <mailto:k9ivb at cox.net>> wrote:
>
>     Tony
>
>     I am working on one solution.  See my Munin 2 page near the bottom
>     for an Alternate Alex Interface.  Just gathering parts to build.
>     http://k9ivb.net/munin2/
>
>     Dick K9IVB
>
>     Tony Hagen wrote:
>
>         ***** High Performance Software Defined Radio Discussion List
>         *****
>
>
>         ------------------------------------------------------------------------
>
>
>
>         Hi All,
>
>         To interface Munin with Hermes we need Alex RF filters, with
>         overwhelming response of Munin I was wandering why there is no
>         Buzz in Alex-Boards - Like do you all have Alex Board in hand
>         or some other solution.
>
>         Please let me know
>
>         73s
>         Tony
>         ------------------------------------------------------------------------
>
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