Hewlett Packard 420A Crystal Detector 4421, Vintage RF Component

Hewlett Packard Model 420A Crystal Detector - Made in USA - Vintage RF Component

The detector measures approximately 3/4" in diameter and 3 5/8" long.

Vintage Hewlett Packard Model 420A crystal detector. All-metal construction, made in the USA. This unit is untested and is being sold as-is, with only what is shown in the photos included. Ideal for RF engineers, vintage electronics collectors, or restoration projects.

This is free shipping to the Continental United States.
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You are also welcome to visit or call us Monday-Friday 9am-4pm Central Time to discuss purchases. Our number is 217-779-3992. Be prepared with the title.
Our address is The Grainery 6411 Ehrhardt Rd Payson, IL 62360