"mm" wrote in message
...
Is it dangerous to the output transistors or something to run a radio
without speakers?

What if the volume control is kept at the minimum?

This wouldn't be a problem with a tube set iiuc, right?, but I'm not
so sure about transistors, if, say, the volume were accidentally
turned high. (No I didn't do that, but I was wondering how much
effort I should expend just so I can turn the set on and measure some
voltages.)

With transistor amplifiers, they are all some form of emitter-followers
(common-collector) and they can run safely with no output load.

Tube amplifiers can produce voltage spikes when unloaded.