This Brand New Key & On/Off switch for the EF Johnson Desk KW Amplifier & 500 Transmitter, Is the original Switch and key made by the Arrow Hart Company.
This original part is very hard to find.
Many of the KW Desk Kilowatt amplifiers and Johnson 500 Transmitters have had the original key and switch removed, so this is a great opportunity to put back the original switch and key.
It is also nice to have a spare key!
This switch is rated 8 amps at 125 volts and is a useful safety switch for other electronic devices as well.