19 Set Control Unit Batteries

[Chris Suslowicz]

Originally Posted by charlie fitton

What is the input voltage range that the radio can handle?


Might be worth it to mock up a top, and replace the innards with a Lithium-whatever battery pack and have power forever..

It doesn't really apply in this case. The battery is 4 cells, giving 6 volts tapped at 3 for the carbon microphone (it's basically a field telephone with added bells and whistles (well, in this case a keying relay and some extra switchery)).

The 6 volts is used to operate the keying relay at the 'local' (to the set) end, and extra cells can be added if the line circuit has too much resistance for it to operate reliably.

Chris.

[charlie fitton]

Originally Posted by Chris Suslowicz

It doesn't really apply in this case. The battery is 4 cells, giving 6 volts tapped at 3 for the carbon microphone (it's basically a field telephone with added bells and whistles (well, in this case a keying relay and some extra switchery)).

The 6 volts is used to operate the keying relay at the 'local' (to the set) end, and extra cells can be added if the line circuit has too much resistance for it to operate reliably.

Chris.

Nom voltage for a LION battery is 3.6v per cell, if the circuits can handle that, then your radio will run for months between charges. Keep the rare batteries for show.