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Old 26th Jul 2019, 5:28 pm   #38
Uncle Bulgaria
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Join Date: May 2016
Location: Cornwall, UK.
Posts: 2,314
Default Re: Uher CR240 Troubleshooting Best Practice

It feels like the home straight now.

With the newly electrolytic'd playback amplifier, and many tantalums changed on the main board (and in the power supply), I've played a tape through headphones with both channels loud and clear. The changes have removed a lot of the hiss and hum that was present even when the channel was 'working', so I can only put it down to the new capacitors.

I've just put the meter panel back, and found a duff resistor - the panel illumination was on whether the lighting switch was on or not. Now it's fixed, but the new supposedly 3V bulbs (grain of rice/wheat types) I got are so dim the filaments are barely glowing. They measure about 2R each, compared to the 12R on the one remaining original. Is this definitive that I've been sold the wrong bulbs, so I can complain to the seller?

The circuit specifies 3V, 30mA, which seems impossible to find. I got these.
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