The early Dynair switches are passive and they only require pushing in
the old fashion PB snap switches. The only voltage they use (optional)
is for switch illumination which was required to show with video monitor
was connected to a particular source in a darkened control room. I
removed all wiring and the 12v supply since it is easy to see in front
of me which RX antenna is selected. My only complaint is that during a
contest one hand (also the one I send CW with) is constantly changing
antennas. The design by Gary with the momentary pad is a big
improvement especially if it has a computer interface selection for
remote operating. Right now I can only switch 6 antennas by the remote
op on the mainland by using IP Power and a bunch of relays in
conjunction with a DX-Engineering RTR-1
Herb Schoenbohm, KV4FZ
On 7/5/2015 6:17 PM, Roger D Johnson wrote:
It appears that the better video switches need a signal from the
vertical blanking interval to switch. No
signal, no switching. Probably explains why they are so cheap on eBay!
I have 3 bi-directional Beverages, an 8 circle and 4 square receiving
antennas. I would like to switch
any one to my K3 main rx, K3 aux rx, R-388 or DX Engineering NCC-1
phasing box. That's 8 inputs
and 4 outputs minimum.
Ideally, some sort of matrix arrangement would do. I've looked far and
wide for a commercial unit that
would do the job but no luck. Virtually everything is designed for
SO2R operation. At present, I'm using
a switcher used in RV units. It has 5 inputs and 3 outputs. I use a
separate switch for Beverage selection.
Thanks for all the inputs!
73, Roger
On 7/4/2015 21:47, Roger D Johnson wrote:
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>
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|