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The HP 3245A Universal Source is a versatile precision instrument that combines DC and AC signal generation, offering both high-resolution DC outputs and synthesized AC waveforms up to 1 MHz. Function Details DC Outputs 24-bit resolution, 60 ppm accuracy, voltage & current modes AC Outputs Sine, square, triangle, ramp, pulse up to 1 MHz (100…
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Firmware Gigapan Epic Pro Firmware Update Problems and Solution (Updated November, 2025) Gigapan has a firmware update available for the GigaPan Epic Pro, here: GigaPan Epic Pro Firmware Update To find out if you need it, check the firmware on your Epic Pro thus: Select “Options” – “Expert Options” – “Firmware Version” The current firmware version…
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Originally posted in December, 2018 Tektronix 556 Dual Beam Oscilloscope Images What follows is a series of images of my Tektronix 556 Dual Beam Oscilloscope displaying various waveforms. I am learning about this scope and how to use it. A brief description of the unit can be found here: Tektronix 556
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Originally posted in February, 2017 Numitrons are low voltage incandescent display devices perfected and marketed by RCA (see RCA advert above) in the early 1970’s. I would call this a bridge technology as the display is incandescent, but can be driven by integrated circuits. They were quickly displaced by solid state LED (light emitting diode)…
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Originally post in August, 2020 During a recent printing session, my Z3200 displayed an “86:01 paper jam” error. Upon inspecting the printer, I quickly realized that the carriage belt had become slack. I replaced the OEM carriage belt several years ago with a high-quality belt from LPS Computer, so I was confident the belt had…
Shaun Merrigan
Classic Electronic Restoration, Vacuum Tube Audio, Technical History, Photography