Re: HP 478 A? Thermistor mounts
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I have, as listed in the 1994 Options List, an HP-478A-H63, which is spec'd to operate from 100 KHz to 1 GHz and it really does respond that low and lower. It belonged to HP Division 4 (does anyone know that division?) and was last calibrated in 1981, according to the cal sticker. It works very well and is great for calibrating RF voltmeters that operate in the "less than 1 GHz" range such as my HP-411A RF Millivoltmeter. Jeremy N6WFO ? On Tue, Mar 4, 2025 at 3:04?PM Paul Bicknell via <admin=[email protected]> wrote:
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Jeremy Nichols