Topband: Topband Digest, Vol 151, Issue 3

Sun Jul 5 12:55:54 EDT 2015

How about this, there are other RX antenna switches here too.
http://www.udcsys.com/RX-6ReceiveAntennaSwitch.html

Jay, WX0B

Jay Terleski
Array Solutions
214 954 7140

On Sun, Jul 5, 2015 at 11:00 AM, <topband-request at contesting.com> wrote:

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> Today's Topics:
>
>    1. Video Switch for Low Band Antenna switching (Roger D Johnson)
>    2. Re: Video Switch for Low Band Antenna switching
>       (Herbert Schoenbohm)
>    3. Re: Video Switch for Low Band Antenna switching
>       (Herbert Schoenbohm)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 04 Jul 2015 21:47:43 +0000
> From: Roger D Johnson <n1rj at roadrunner.com>
> To: Top Band Reflector <topband at contesting.com>
> Subject: Topband: Video Switch for Low Band Antenna switching
> Message-ID: <5598547F.4050503 at roadrunner.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> 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>
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 04 Jul 2015 18:30:57 -0400
> From: Herbert Schoenbohm <herbert.schoenbohm at gmail.com>
> To: topband at contesting.com, n1rj at roadrunner.com
> Subject: Re: Topband: Video Switch for Low Band Antenna switching
> Message-ID: <55985EA1.4040105 at gmail.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> 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:
> > Boxbe <https://www.boxbe.com/overview> This message is eligible for
> > Automatic Cleanup! (n1rj at roadrunner.com) Add cleanup rule
> > <
> https://www.boxbe.com/popup?url=https%3A%2F%2Fwww.boxbe.com%2Fcleanup%3Ftoken%3Dnp%252Bsb5oLW0EM1MiGv38HJp5SUI58ppPRSOpvKCFUJoQ%252BC1b%252F%252Fd5cjSefau95xVXwxnFmSSwUatUl%252Fd%252BX4fby4vOtZvLohd1eJzWOO5EAZyS8V5GycsrS5GFxQEdl2XY62EXybK3klIQ%253D%26key%3DA7%252F34s4sBlm2aKuS%252BezNSB0IavmYLPaMHZ73KUHql5E%253D&tc_serial=21867422542&tc_rand=1661170955&utm_source=stf&utm_medium=email&utm_campaign=ANNO_CLEANUP_ADD&utm_content=001
> >
> > | More info
> > <
> http://blog.boxbe.com/general/boxbe-automatic-cleanup?tc_serial=21867422542&tc_rand=1661170955&utm_source=stf&utm_medium=email&utm_campaign=ANNO_CLEANUP_ADD&utm_content=001
> >
> >
> > 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
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 04 Jul 2015 18:42:11 -0400
> From: Herbert Schoenbohm <herbs at vitelcom.net>
> To: topband at contesting.com
> Subject: Re: Topband: Video Switch for Low Band Antenna switching
> Message-ID: <55986143.6030303 at vitelcom.net>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> Roger,  I took a look at this unit and it appears to be an active unit
> rather than a passive switcher that you need for Topband.  You can call
> Dynair at 858-450-0504 and see if they can tell you where to download a
> schematic.
>
> Herb, KV4FZ
>
> On 7/4/2015 5:47 PM, 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
>
>
>
> ------------------------------
>
> Subject: Digest Footer
>
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> ------------------------------
>
> End of Topband Digest, Vol 151, Issue 3
> ***************************************
>