The picture shrank to a white line, then a dot, then nothing. Or the sound kept going but the screen went dark. Either way, someone in the house said the same thing: "It's probably a tube."
Off came the back panel, the one that said not to remove it. Inside, rows of glass tubes, some still warm. Into a paper bag they went, and off to the drugstore.
What the Job Was
The TV repairman fixed televisions, in the shop or in your living room. In the early days of TV, he was as necessary as the plumber.
Early sets were full of vacuum tubes, as many as 30 in a single TV, according to WSHU's Vintage Radio series, and they failed often. Radio and TV repairmen became a fixture in every town, and the trade peaked in the 1950s.
A Day on the Job
Most repairmen worked out of a shop and a truck. The truck carried test equipment and a "tube caddy," a case packed with spare tubes, so most problems could be fixed right on the spot. Only the toughest cases went back to the shop.
A typical house call meant pulling the set away from the wall, taking off the back, and working through the tubes and parts until the picture came back. In 1962, a trade magazine for technicians complained that a $3.00 house call didn't earn shops enough profit.
One former repairman, writing his memories for the Early Television Museum, recalled that running a shop took a real investment: tube testers, meters, oscilloscopes, special tools, a stocked tube caddy, and a file cabinet full of service manuals for every brand.
The Drugstore Tube Tester
Here's the part a lot of us remember. Many drugstores, hardware stores, and radio shops had a tall self-service tube tester. You plugged each tube into the matching socket, pushed a button, and read the meter: good, or replace.
The store had a reason to be generous. New tubes were usually kept in the cabinet right under the tester, and replacement tubes made retailers a tidy profit.
Repairmen were skeptical. Some said the testers made good tubes look bad. In January 1964, Popular Electronics ran an article asking, "Can You Trust a Drug Store Tube Tester?" A working technician explained that the machines ran a simple emission test, and that the only sure test was swapping in a new tube. The Early Television Museum notes a common rumor, "maybe spread by TV repair shops," that the testers were rigged.
And the repairman's memoir has a familiar story: do-it-yourselfers who bought a sack of "weak" tubes at the drugstore, and then called the shop anyway when the set still didn't work.
The Skills Nobody Saw
TV repair was real electronics. Technicians learned through apprenticeships and study, and kept learning as new technology came in. They read wiring diagrams, worked around high voltage inside the set, and diagnosed problems by the look of a picture and the sound of a hum.
Why It Disappeared
Transistors. By the 1970s, solid-state sets with transistors instead of tubes were far more reliable. Fewer breakdowns meant fewer house calls.
Cheaper TVs. As sets got less expensive, replacing a broken TV began to cost about as much as fixing it.
No more tubes. With tubes gone, the drugstore tester disappeared, and so did the paper-bag trip.
Where It Lives On
Vintage radio and TV collectors still restore tube sets, and old drugstore tube testers turn up in museums and antique shops. The Early Television Museum in Hilliard, Ohio, keeps one in its collection. And a few repair shops in small towns are still open, now fixing everything from speakers to flat screens.
Did your family ever take TV tubes to the drugstore to test them?
Sources
- "Vintage Radio: The Radio Repairmen," WSHU, March 2017
- "Drug Store Tube Tester" and Stanley Pitman, "Memoirs of a Technology Geezer," Early Television Museum
- "Can You Trust a Drug Store Tube Tester?" *Popular Electronics*, Jan. 1964 (RF Cafe archive)
- *Electronic Technician*, March 1962 (World Radio History archive)
Related Reading
- [Why TV Stations Signed Off at Night](/remember-when/why-tv-stations-signed-off-at-night)
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