Thanks, Edward-
Thanks, Edward-
Now I have to figure out what the relay mounted on ledge with the two
small tubs is intended to do. I have problems tracing sets with no
documents for revisions.

On Fri, 11 Mar 2005 22:30:38 GMT, Edward Knobloch
wrote:

Edward wrote:
On a Johnson Ranger I :
With a relay added for antenna change over, what additional components
are required ?
How does it operate ? Wiring req'd. ? I have always used separate
antennas for TX & RX and have no idea operating details.


Hi, Edward

The antenna relay output jack on the back of the Ranger
has 115vac across the contacts when the Ranger is in c.w. mode,
or a.m. mode. The voltage is not present in standby mode.
If your Ranger has the optional internal
push-to-talk relay modification added,
then the 115vac for the antenna relay will appear
in c.w. mode (at all times) or in a.m.
mode only when the microphone push to talk button is pressed.

You connect the Ranger's antenna relay output jack
to the 115vac coil of a coaxial relay. On a Dow-Key coax relay,
the coil connections are the two small pins on the metal cylinder.

The coax from the transmitter rf output
goes to the female coax jack opposite the coil of the Dow-Key coax relay.
The receiver coax goes to the female coax connection next
to the coil. The antenna coax goes to the female coax connection
at the end of the coax relay.

If your coax relay includes "auxillary" contacts opposite
the coil, they can be used to mute your receiver.
If your coax relay doesn't have auxillary contacts,
you can wire another, cheap relay's 115vac coil across the
coax relay coil, and use the contacts of the cheap relay
to do the muting function.

Some receivers are muted by opening a lead, some by closing a lead
to ground.

73,
Ed Knobloch