23-01-2017, 05:19 PM
I can now see Miguel's point about broken transistor legs. I haven't worked on radios modern enough to use boards, but I have already found the legs can get very brittle over time. My valve radio PCB board has some very brittle capacitor leads and, I suspect, one or two dry joints.
On the Soviet East German radios also they use very thin wire and the closest I can compare to it is telephone wire, except this latter is a bit thinner. Even so, two twisted telephone wires would pretty much equal the East German wire. And equally as brittle. This wire solders very well indeed but the wire itself is a bit brittle and stiff.
In my free time, actually, I have revised my basic transistor theory as I'd forgotten most of it. The usual stuff such as PN junctions. The book I was using had an angle that given the resistance of each PN junction differs hugely due to the forward or reverse bias, the power amplification in watts is considerable.
On the Soviet East German radios also they use very thin wire and the closest I can compare to it is telephone wire, except this latter is a bit thinner. Even so, two twisted telephone wires would pretty much equal the East German wire. And equally as brittle. This wire solders very well indeed but the wire itself is a bit brittle and stiff.
In my free time, actually, I have revised my basic transistor theory as I'd forgotten most of it. The usual stuff such as PN junctions. The book I was using had an angle that given the resistance of each PN junction differs hugely due to the forward or reverse bias, the power amplification in watts is considerable.
