[Johnson] FS: Johnson Signal Sentry

[BSugarberg]

Hello,

I have the following for sale:

Johnson Signal Sentry.  "Performs four important
station functions:  Monitors CW signal, monitors
phone - checks audio quality, "on the air" indicator,
mutes receiver for "break-in".

"The Signal Sentry provides a pleasant monitoring
tone which follows the keyed signal of the transmitter.
It also demodulates and amplifies the signal on phone
for monitoring audio quality and checking carrier
distortion and hum.  CW tone is adjustable from the
front panel, and a separate audio volume control
permits adjusting the Signal Sentry volume independent
of the volume setting of the receiver.  Because it is
triggered directly by transmitter RF energy the unit
acts as an "on the air" indicator.  The Signal Sentry
is also designed to provide "break in" operation by
muting the receiver audio system when it is energized by
the transmitter RF." With copy of instructions. $35.00

73, Bruce WA8TNC


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