Thanks for the great explanation, Howard.

Knowing that the noise bridge tuner aid has an on-off switch helps.

I appreciate the info, and likely will order one of the noise bridges once I
get back to the home qth in a week and a half.

Tom Behler: KB8TYJ


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Howard, W A 9 Y B W
Sent: Thursday, August 29, 2013 9:44 PM
To: [log in to unmask]
Subject: Noise Bridge

Tom,

You would install the tuner aid between your transceiver and your amp =
where=20
the power is low.  Switch off your amp or set its controls so that your=20
transceiver is connected to your tuner and antenna, adjust your tuner =
for=20
the null in noise which is the lowest SWR.  Now you can turn on your amp =
and=20
enjoy.  The tuner aid will never see the amps high power.  All you will =
need=20
is an additional  short coax jumper to install the tuner aid.  Before =
using=20
your amp you can test the SWR with the TW1 or the SWR meter on your 590 =
to=20
insure it is within reasonable limits.

Remember, you should turn off the tuner aid before transmitting even =
though=20
it has a protection circuit in case you forget.  I wouldn't rely on this =

circuit in place of turning it off consistently.

73

Howard #3