[TowerTalk] Multi-station antenna selection patch panel

[Pete Smith N4ZR]

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
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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 at arrl.net
> web: http://wiki.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://k1ttt.net
>
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Jim
> Lux
> Sent: Saturday, January 18, 2014 03:13
> To: towertalk at 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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