Orange OR 80 Restoration

A 1972 Orange OR 80 amp that had been beaten hard came to me recently for a full restoration. I wish I had the “before” photos, but I was camera-less at the time. It sounded really bad and looked even worse. It was covered in grime to the point that the torn and tattered orange tolex was nearly black in places. The power switch was snapped off in the on position, and the AC cord was frayed. The controls were all scratchy. It was...

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Building A Dim Bulb Tester

Since I am holed up in the biggest blizzard New England has seen in a while, it seemed like a good time to build something every amp builder and repairman needs on the bench, a dim bulb tester. Funny name,  I know, but what does it do?  It is a simple current limiting device that is very useful when powering up amplifiers either for the very first time, or when one comes in with a potential power supply issue. It’s pretty cool,...

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