Shaun Merrigan
Classic Electronic Restoration, Vacuum Tube Audio, Technical History, Photography
Tag: Shaun Merrigan
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The Nixie Tester Project by Marcin Saj, comprises an enclosure/power supply/receptacle and a matching family of plug-in socket adapters. There are now over 30 different sockets available to accommodate any nixie tube in existence. I have been working my way through assembling my collection of 20 or so sockets, and realized that documenting the process…
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Our Kenmore Elite 30″ Induction/True Convection range recently developed a problem where the oven would not come to temperature in the expected time, nor would it ever attain the expected temperature. The Model number of the unit is 223 666 003 with a manufacturer number of 970-66003. However this repair applies to any number of…
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I documented the repair of two Tektronix DM 5010 digital voltmeters here. I will not rehash the entire calibration process here. That is easily found in the manual for the DM 5010 which is available on the Tek Wiki. Rather, I will highlight items which may help readers avoid pitfalls and save time. Equipment Needed:…
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The HP 3445A is a compact, rackable plug‑in digital voltmeter from Hewlett‑Packard’s classic 34xx family, offering fast autoranging DC and AC measurements, clear numeric readout, and system‑friendly outputs that made it a staple in production racks and vintage labs. HP 3445A overview The 3445A is a plug‑in digital voltmeter designed for HP’s modular instrument systems,…
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The HP 3440A is a plug‑in style digital voltmeter designed for HP modular systems and bench racks. It was offered as a versatile measurement unit with a focus on accurate DC voltage and resistance readings, remote triggering, and digital outputs for system automation. With the appropriate plug-in, it can also measure AC voltage, and DC…