Topband: Video Switch for Low Band Antenna switching

[Herbert Schoenbohm]

Roger,  as long as the switch is passive and not active it will work 
well for you as unused ports are terminate in 75 ohms.  I use a 12X1 
Dynairs here and they have excellent isolation plus it terminates the 
unused reversible Beverage feedline (which is recommended for greater 
rejection).  I just cut the RG6 minus the VF to multiples of a half wave 
length so the termination at the switch appears on the unused port. I 
prefer this to running voltage out to relays which always seem to fail 
at some point.


Herb Schoenbohm, KV4FZ

On 7/4/2015 5:47 PM, Roger D Johnson wrote:
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>
> I've been looking for a way to switch multiple receiving antennas to 
> multiple receivers. I know some hams are
> using video switchers but info on them is scarce. There is a Dynair 
> SVA-100B for sale on eBay but no real description
> of it's functions.
>
> It seems obvious that you can, for instance, switch input 3 to output 
> 7 but can you simultaneously switch input
> 5 to output 6? In other words, can you have more than one path through 
> the switcher?
>
> Any other ideas on switching greatly appreciated!
>
> 73, Roger
>
>
>
>
> <http://antiqueradios.com/forums/report.php?f=2&p=2337227>
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