Hi.

Well, in my station, I would probably just use one of the communications 
receivers to adjust the tuner and unhook the bridge at the tuner side and 
put the coax from the transceiver back to the tuner.  No danger of 
transmitting into the bridge that way, because just one bumped PTT switch 
or straight key would be all it takes.  The receiver would be a lot safer.

73, de Lou K2LKK



At 01:03 AM 5/8/2006 -0400, you wrote:
>Hi Tom and All, here's the essence of a friend's last summer's posts to me
>re
>this little noise bridge kit, still in production, from tentec.  Hope it may
>help someone, DD
>
>"There's a noise bridge board kit on the Ten-Tec site:
>
>http://radio.tentec.com/kits/Accessory
>
>This is the description:
>
>""Have you ever wondered what good one of those
>"R X Noise Bridges" could do for YOUR station setup?
>Are you baffled by your antenna tuner or "transmatch"?
>
>The 1051 is easy to build and super-easy to use. No
>"R-X" controls, calibration or calculations needed.
>Just connect it between your rig and antenna tuner,
>set receiver to desired operating frequency, and
>adjust the antenna tuner until the distinctive
>modulated pulses (NOT just straight "noise"!) drop
>to an easily-recognized "null" indicating that the
>tuner offers a 50-ohm match to your transceiver
>with NO on-the-air nervous experimenting with the
>tuner controls!""
>
>-----
>
>This is a board kit only and costs $19
>plus shipping.  From the size of the one 14-pin DIP
>chip I'd say the board is probably about 2.5" x 3.5"
>or so.  It would need to be mounted in some sort
>of enclosure, _And _Remember! Transmitting into receive noise bridges
>will destroy them, so unless Ten-Tec built in some
>sort of transmit bypass, we'll have to have some sort
>of T/R arrangement that cuts out the bridge when you
>transmit.  I've emailed Ten-Tec asking them about
>that..................Ten-Tec got back to me.  The board kit antenna
>bridge runs on anything from 9-12V at very low
>current.
>It does not have any transmit bypass capability so
>that has to be added.  A rotary switch could be rigged
>to do that.  Since the bridge produces a beeping
>on its own, that could be used as a reminder to
>switch it out BEFORE you transmit.  This means that once you are tuned, you
>*must*
>remember each time to switch out the bridge before
>you transmit, or you'll fry it......"""

Louis Kim Kline
A.R.S. K2LKK
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