Here some tools that I use to repair my radios.
signal tracer and digital multimeter.
From the sixties and seventies, working fine, the multimeter was bought on a market in Liëge Belgium for $1,00.
Telequipment scope Minor
This tubed mini scope is from the 60s and works fine.
Unknown brand transistor tester
This transistor tester I found on a market, after I repaired the right switch, it worked fine. It works on 2 AA cells. The working of the tester depends on a 10 KHz oscilator. I do not know what brand it is.
Philips transistor tester.
From the late 50s and works fine.