On Thu, 03 May 2018 21:53:36 -0400, George Cornelius wrote:

+AD4 Interesting. Just what I want to have around is a two-prong A/C plug
+AD4 which will catch fire when inserted into a wall outlet.
+AD4
+AD4 Or, for that matter, which when inserted into the back of a receiver
+AD4 which is actually supplying power via that connector.
+AD4
+AD4 George

Check out the +ACI-B Switch+ACI terminal strip mentioned at the bottom of this
page:

https://people.ohio.edu/postr/bapix/NC-183D.htm

Boatanchor B+- on a bare screw terminal strip of the same kind as the
speaker and antenna connections. No fuse and no warning, either, unless
you're hip to the meaning of +ACI-B Switch+ACI.

Hallicrafters used an octal socket and an octal shorting plug for similar
duty on alot of it's radios. The octal socket was a convenient place to
borrow power for an external accessory such as a Q multiplier. The
shorting plug sometimes went AWOL, which would disable the receiver.
It's very easy to fab up a duplicate or just short a couple of terminals
on the back of the octal socket.

The Hallicrafters octal socket is usually labeled +ACI-POWER+ACI. The manual
that came with the radio showed a schematic to run the radio on battery
power or, presumably, a dynamotor.

No power fuses on these radios but they're easy to add.

Alot of these ham/SWL radios came with a phono switch. Were turntables
often used with these radios? It seemed pretty useless to me, then it
struck me that the phono switch position would be ideal for use with a
Select-O-Ject or something similar. The phono switch doesn't disable the
radio and audio is still available at the headphone jack. The switch
just switches the audio input of the speaker amplifier to the RCA jack on
the back panel. I don't have a Select-O-Ject to try it but it seems like
it would work well.