03-18-2023, 09:29 PM
I've started looking into the collection of radios and speakers from a local museum. The Thompson Speaker looked simple enough to start with.
[Image: https://www.dropbox.com/s/qjwtkayltquxnz....jpg?raw=1]
[Image: https://www.dropbox.com/s/o42z9erj8e7a6w....jpg?raw=1]
The wires for connection to the radio are missing so the bottom looked like a good way in. The screws were rusted in so an overnight soak with WD40, a slight tap with a hammer on the screw driver and they broke loose. Unfortunately the base also seems to be glued on somehow.
[Image: https://www.dropbox.com/s/91z06qcpnb44yl....jpg?raw=1]
I attacked it from the top next and was rewarded with opening it up and being able to get to the mechanism.
[Image: https://www.dropbox.com/s/gs7pq5nunv6c5x....jpg?raw=1]
[Image: https://www.dropbox.com/s/v9hz91xhrp48wg....jpg?raw=1]
The actual audio mechanism looks pretty good so I'm hopeful it will work OK. The base is rusty so it will need some cleaning later.
[Image: https://www.dropbox.com/s/ao9li586ykbb5z....jpg?raw=1]
Replacing the connection wires looks simple so thats next and then a test. I've never worked on these battery powered radios with this type of speaker before. Any thoughts on a way to test the speaker? Perhaps just connecting the audio output from my signal generator would work (without the RF signal)?
[Image: https://www.dropbox.com/s/qjwtkayltquxnz....jpg?raw=1]
[Image: https://www.dropbox.com/s/o42z9erj8e7a6w....jpg?raw=1]
The wires for connection to the radio are missing so the bottom looked like a good way in. The screws were rusted in so an overnight soak with WD40, a slight tap with a hammer on the screw driver and they broke loose. Unfortunately the base also seems to be glued on somehow.
[Image: https://www.dropbox.com/s/91z06qcpnb44yl....jpg?raw=1]
I attacked it from the top next and was rewarded with opening it up and being able to get to the mechanism.
[Image: https://www.dropbox.com/s/gs7pq5nunv6c5x....jpg?raw=1]
[Image: https://www.dropbox.com/s/v9hz91xhrp48wg....jpg?raw=1]
The actual audio mechanism looks pretty good so I'm hopeful it will work OK. The base is rusty so it will need some cleaning later.
[Image: https://www.dropbox.com/s/ao9li586ykbb5z....jpg?raw=1]
Replacing the connection wires looks simple so thats next and then a test. I've never worked on these battery powered radios with this type of speaker before. Any thoughts on a way to test the speaker? Perhaps just connecting the audio output from my signal generator would work (without the RF signal)?
