The TopTen relay boxes have for years used $2 DC power relays, and I
recall they said they had been tested at up to 3:1 SWR. In their A/B
switches, they use two of these in series for better isolation. Given
the rather indifferent isolation numbers given in the RCS-10 manual
(depending on band) I would hesitate to use one in a situation where it
was the only protection for a receiver.
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 1/18/2014 7:07 AM, David Robbins wrote:
Agree, any to any gives lots of relays no matter how you do it. but you
really don't need vacuum relays, most of the common switch boxes today just
used regular frame relays. If you want to keep cost down by using off the
shelf parts try looking at the rcs-10 remote switches that do 8 to 1, I am
using them for my rx antenna switching:
http://wiki.k1ttt.net/2011%20Maintenance%20and%20Upgrade%20Blog.ashx#bevswit
ch and they work well... of course there is no lockout, you would have to
come up with that in whatever provides the control power. I think k1xm was
working on something like that, but not sure how far it ever got.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://wiki.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://k1ttt.net
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim
Lux
Sent: Saturday, January 18, 2014 03:13
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Multi-station antenna selection patch panel
On 1/17/14 5:10 PM, krishna kanakasapapathi wrote:
Howdie,
I am looking into build a panel that would distribute 8 to 10
antennae to 5 to 6 stations in a
any-to-any setup to handle 1kw. Prefer lockout( if a sophisticated
design), but even manual switching would
be sufficient. I know it needs vaccum relays etc.
Don't want to reinvent the wheel. Where can i find a good
design/precedent ?
A couple things to think about.. what sort of isolation do you need?
That sets the number of sets of contacts you need between two paths.
I'd look at some sort of crossbar arrangement, but that's 60 relays.
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