Tubes are not so unreliable


While getting my hair cut, I remarked to my barber about his Zenith table radio. It featured FM, but seemed to be of mid-60's vintage. He confirmed that he probably bought it in 1965 or 1966. When I told him it must be tubed, he said it was. He has played it every day the barbershop has been open since the radio was purchased. I asked him how often he has had to replace a tube. The answer was, "Never, I have never touched anything inside of it." He didn't know how many or what types of tubes the radio used. His sentiment was that if a tube ever goes, he will have to retire it(but not get rid of it). That's when I told him to tell me if that ever happens. I will hook him up with the tubes. That was when Zenith was Zenith. Before the dark days; how they went from being the best to the worst. The radio was bought for the princely sum of $85. I wonder how much that would be in today's money. Enough to buy the WaveRadio I am sure. Now, who would ever suggest that someone buying the Bose would ever get 35 years of use out of it? I guess tubes are not so unreliable after all. So, for anyone who worries about buying tube equipment, you might want to think about this story
trelja

Showing 1 response by sean

Power output tubes in RF gear take a beating. As such, one of my fellow "techs" uses a tube radio on his bench to test all of his repairs. The original tubes in the output section have been used on a daily basis since 1968 up until appr 2 years ago. He finally decided to change the output tubes. After all of those years of use and running at full output on a daily basis ( 7 days a week ) and having the tube run into amplifiers that had damaged input circuitry, the power output level was down only 22% as compared to a brand new tube of the same vintage. I don't know of ANY type of SS component that could lay claim to ANYTHING like that. Sean
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