Edward wrote:
Thanks, Ed-
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.


A relay mounted on the shelf near the mode switch
is the recommended (by Johnson) location for a push to talk relay.
I'm pretty sure the mod appeared in later editions of the Ranger manual,
and it appears on pages 18 and 19 of the Ranger II operating
manual. The recommended Ranger II version
uses a double-pole-double-throw relay,
one pole for controlling the rf stages in a.m. mode,
and one pole for switching the antenna relay control
voltage at the rear panel jack.

Since your Ranger has a push to talk (PTT) relay, it should have
two connections plus ground at the mic jack.
Grounding one of the mic jack connections, while the rig
is in a.m. mode, should cause the relay to pull in,
and the rig to transmit.

My Ranger II has a nice addition:
A previous owner used 4 pole PTT relay, and he used
the extra two poles to switch the screen voltage
to the modulator tubes, and to control the red
indicator lamp on the Ranger II.
By opening the screen supply to the modulator tubes
in standby, the modulator tubes draw no current.
The tubes last longer, and there is less heat in the cabinet.
In fact, my Ranger II has the original
Johnson-labeled modulator tubes.

You can get a Ranger II Owner's manual, showing the PTT mod,
at http://bama.sbc.edu
This site is mirrored at http://bama.edebris.com/manuals/


Regards,
Ed Knobloch