Tag Archives: repair photos

1969 GE Model C2504B Transistor Clock-Radio Repair

This iconic late ’60s GE clock radio came to the shop with loud, low humming when turned on and no radio reception. That’s a familiar problem! Time for new capacitors. This particular used a 100 uF main filter and several 200-400 uF secondary filter capacitors around the boards, along with three electrolytic coupling capacitors in the signal chain. They were very tired and as shown by the hum had started to short out; if the radio continued to be run with the loud hum it could have been badly damaged so it came in just in time. Some new components later, she’s good as new and sounds surprisingly good for such a small radio. There’s a mystery switch inside, too – do you know what it might control? Read more for more photos of the repair.

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Bose 901 Series II Active Equalizer #103549

This Bose® 901 Series II Active Equalizer is a part of Rain City Audio’s parts stock and got a full rebuild with upgraded parts and complete and comprehensive testing. All transistors, resistors, film and electrolytic capacitors were replaced, a new neon bulb added, and the controls cleaned and lubricated. This very detailed repair walkthrough has photos showing the drifted carbon composition resistors which can throw off the equalizer’s curve even if all the capacitors have been replaced. Click through for many more photos!

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Posted in Audio, Bose, Electronics, Hi-Fi, Stereo, Vintage | Tagged , , , , , , , , | Leave a comment

1962 Coronet 6 Transistor Shirt-Pocket Radio TRN-6

This rare early shirt-pocket transistor radio, the Coronet TRN-6, needed a few new capacitors to sound its best. It delivers surprising performance from such a small package! Plenty of tear-down photos in this article.

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Posted in Radio, Radios and Tubes, Vintage | Tagged , , , , , , , , , , , , , , , | Leave a comment