No, battery operated unless you use a "power pack", or external DC supply. The isolation of that may be in question.
We were taught to trust nothing and always measure.
We were taught to trust nothing and always measure.
Yes. Figure-of-eight mains connector (no earth), tiny C-core mains transformer for isolation, rectification, smoothing, and a simple discrete component regulator, all in a little folded aluminium casing that is also the series pass device's heatsink. Buried behind the loudspeaker. The radio is very slim, and it's tightly packed inside. Somebody spent some time working out how to get everything in.
Electric shocks are not good. Before I retired, company practise was that any shock and you were driven to the health centre to be tested. Apparently, a shock can cause the production of chemicals that make you drop dead a day later. Prompt testing enables them to be detected and preventative action taken. Annual shocks means you are playing statistics; sooner or later your number will come up.
It's definitely not an audio fault. Took a little while to prove it because it turns out that you have to press FM and MW buttons down simultaneously to connect to the DIN socket, but once that was done audio burbled out. A bit tinny because the covers were off, but definitely present and correct. Time to check DCs in the IF strip etc. I am rapidly losing patience with the idiot who shows the PCB layout from the component side (which is difficult to probe), rather than from the foil side which is entirely exposed and easy to probe. I'd scan it, mirror it, enlarge it and print it, except the legends would then be back to front.
Hi EC8010,
I should have died several times over I guess. Instead I just tell myself I'm an idiot each time.
Good, cleared the audio section. Low B+ in the IF is a classic, also the front end. It can work, but with very low signal levels. Open bypass capacitors usually cause oscillation or bursts of RF at other frequencies. But all bets are off as to how a circuit reacts to however a bypass capacitor went defective.
If the DC is all normal, bypass each bypass cap with something like a 1 uF film (or whatever you have handy). A change in performance means you hit a bad one for sure. No soldering required, this is a quick check.
I should have died several times over I guess. Instead I just tell myself I'm an idiot each time.
Good, cleared the audio section. Low B+ in the IF is a classic, also the front end. It can work, but with very low signal levels. Open bypass capacitors usually cause oscillation or bursts of RF at other frequencies. But all bets are off as to how a circuit reacts to however a bypass capacitor went defective.
If the DC is all normal, bypass each bypass cap with something like a 1 uF film (or whatever you have handy). A change in performance means you hit a bad one for sure. No soldering required, this is a quick check.