Just FWIW, this is the K1XM design.
http://www.k1xm.org/Antenna_Switch/MOAS_II/
Dennis, W1UE has boards available and I am in process of helping out for the
enclosure.
73
Will
K6ND
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Tom
Haavisto
Sent: Wednesday, November 5, 2014 1:17 PM
To: Larry Gauthier (K8UT)
Cc: Topband@contesting.com
Subject: Re: Topband: TX relay assemblies
Hi Larry
If/when you get this going, I too would be interested in this. All my
antenna switching is now done via remote coax switches, and I have a bunch
of remote controls by my operating position that I would like to eliminate.
My thinking is - use the band data from the radio or computer to drive an
SBC, and let it select the correct antennas. I will also need a four port
controller of some sort that I would also see typing into the SBC. I have
several antennas per band - this input would allow me to select the
appropriate antenna in a "one of four". Some form on on-screen notification
would also be helpful to let me know which antenna I have selected.
Tom - VE3CX
On Wed, Nov 5, 2014 at 7:19 AM, Larry Gauthier (K8UT) <K8UT@charter.net>
wrote:
> A few weeks ago there was a helpful, spirited discussion of antenna
> relays here on the reflector. Can we extend that conversation to
> pre-built relay assemblies?
>
> As background: I have recently become involved in writing software for
> these new SBCs (single board computers) like the Arduino and Raspberry Pi.
> My latest project is a band decoder - a UDP-based CAT decoder that
> interprets rig-to-logging-program frequency traffic and selects relays
> to drive my remote antenna switches. The band decoder collects UDP CAT
> data via wi-fi, which means that it could be anywhere within wi-fi
> range - including outdoors at the location of the remote antenna switches.
Hmmm...
> what if the Band Decoder and Remote Antenna Switches were consolidated
> and the Raspberry Pi were to directly drive the antenna selection?
> Then the question becomes whether these relay assemblies are capable
> of handling 1 KW RF.
>
> These relays assemblies are: inexpensive, SPDT, opto-isolated from the
> CPU, include reverse diode protection on the coils, rated for 220VAC
> at 10 amps, and the PCBs have been notched to physically isolate the
> relay common from the two outputs (hard to see that from the photos).
>
> http://www.amazon.com/gp/product/B0057OC5WK
>
> Will these work? How would I test them?
>
> -larry (K8UT)
>
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