Details over de generator staan onderaan deze door ChapGPT gemaakte tekst

The old Telectro TS-382F/U sat on the workbench with the quiet confidence of a veteran that had seen decades of service. It wasn't polished, and it certainly wasn't a museum piece. The olive-drab paint was chipped along the edges, the corners were scuffed, and the handles bore the scratches of countless deployments. Every mark on the exterior suggested the same story: this instrument had spent its life in the field rather than on a display shelf.

Yet opening the lid revealed a striking contrast.

Inside, the TS-382 was immaculate. Not a trace of corrosion, no burned components, no improvised repairs—just neatly dressed wiring, pristine tube sockets, and components arranged with the disciplined craftsmanship typical of American military electronics. It looked as though it had been sealed away from dust and moisture for decades, preserving its heart while its rugged shell collected the scars of service.

The first thing that caught the eye was the power supply. Dominating the chassis were an oversized power transformer and an equally substantial filter choke, giving the generator an unmistakable sense of permanence. This was unmistakably a "built to last" device. Weight had clearly been considered a secondary concern to reliability. Engineers designing equipment for the U.S. military knew that dependable performance mattered more than shaving a few pounds.

As expected of an American military instrument from its era, the TS-382F/U was designed to operate from 110-volt AC mains, making it perfectly suited for U.S. military infrastructure and field generators of the time.

Powering it up produced the familiar warm glow of its vacuum tubes. The generator came to life, the fanless chassis humming softly through the iron core of the transformer. The output meter responded immediately, reassuringly sweeping as the output level was adjusted.

But something wasn't quite right.

The audio waveform lacked the smooth purity one would expect from a properly functioning laboratory generator. Instead of a clean sine wave, there was noticeable distortion riding on the signal. It wasn't severe enough to render the unit unusable, but it was enough to suggest that time had finally caught up with one of its active components. The most likely culprit was either the first amplifier tube, whose performance had slowly faded with age, or the voltage stabilizer lamp, no longer regulating as consistently as it once had. Replacing either would be a sensible first step in restoring the generator's performance.

Then there was the output meter.

Although the meter itself clearly functioned—it tracked adjustments smoothly and showed no signs of sticking—the indicated voltage didn't match reality. Measuring the output with a modern true-RMS voltmeter revealed an output approaching 10 volts RMS, far higher than the panel meter suggested. The discrepancy pointed toward the meter's rectifier circuit. It was likely that one or more of the diodes used to rectify the AC signal for the meter movement had failed, causing the indication to read significantly low even though the generator continued delivering a healthy output.

Even with its imperfections, the TS-382 remained a fascinating piece of engineering. Its worn exterior spoke of field exercises, communications checks, and countless hours supporting military equipment. Its spotless interior testified to careful construction and excellent environmental sealing. The heavy transformer and choke reminded anyone lifting it why military equipment of that era earned its legendary reputation for durability.

It wasn't perfect anymore. A tube or stabilizer lamp deserved replacement, and the meter rectifier circuit clearly needed attention. But none of those issues diminished its character. More than half a century after leaving the factory, this American 110-volt military audio generator still powered up, still produced a usable signal, and still embodied the philosophy that defined so much classic U.S. military electronics: build it once, build it to last, and let it serve for generations.

Goed om te weten:
Hij kan verzonden maar dat wordt wel duur :-(
Hij is echt schoon van binnen, alsof het zo uit de fabriek komt.
Foto van scoop beeld is mislukt. Het signaal is een nette sinus (zonder al die ruis/franje) totdat je onderin komt. Daar "inverteert' het signaal plotseling, en het rooster wordt daar positief t.o.v. de kathode
Wat die 50Hz en 400Hz dingetjes links boven zouden moeten doen weet ik niet
De output meter slaat uit maar ongeveer 10% van full scale. Zoals boven beschreven lijkt de mechanica van het metertje gewoon goed maar is de electronica eromheen defect. Dat had ik eigenlijk alvast moeten repareren maar de kast is nu dicht en hij staat niet meer op de werktafel :-)
Schema is online te vinden.
schroef links onder ontbreekt, alsmede een van de huisjes van de reserve zekeringen
De heater heb ik niet geprobeerd, het is 28 graden buiten
De heater weerstanden zien er goed uit, geen verkleuring ofzo
Nogmaals: 110Volt