Wireless of the Week - week 22

[Chris Suslowicz]

Originally Posted by David Dunlop

Chris.

In Bruce's first post on this thread, last photo, the image is the information plate inside the cover. The section dealing with the loudspeaker states the two terminals marked '19-Set' are connected to windings of 30 ohm value to match the output from the I/C amp in the 19-Set, if that helps at all.

David

It does.

The loudspeaker is obviously a rather heavier load than a couple of headsets, so needs to connect to the IC amplifier rather than one of the set outputs.

The Control Unit 190 is an odd beast with a single droplead for the wireless operator, so everybody else must be using the intercom - either via Junction Distribution boxes (No.3 or No.4 because the Mic+ line feeds into the IC amplifier so it can't be for the power microphone) or the loudspeaker (presumably once the gun is deployed).

Chris.