relay - Why do designers use a series diode and zener for coil suppression rather than just a zener? - Electrical Engineering Stack Exchange
ZL2PD Search for Varicaps
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Varicap - Wikipedia
Zener Diodes in series - YouTube
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Basics: Introduction to Zener Diodes | Evil Mad Scientist Laboratories
How to select series resistor for a Zener Diode - Electrical Engineering Stack Exchange
50PCS/Lots 1SV149 V149 TO-92S Varactor diode: Amazon.com: Industrial & Scientific
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ZL2PD Search for Varicaps
Amazon.com: Exiron 20PCS BB910 Varactor Diode Varicap TO-92S Diode Bb910 Dip IC Develope : Industrial & Scientific
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Zener Diode as Voltage Regulator Tutorial
SMA5918B~5956B Series | Zener Diode 1W DO-214AC SMD - Meritek Electronics Corporation
Varicap diode - SVC series - ON Semiconductor - radial-lead / rectifier
Working Principle and Characteristics of Zener diodes - Utmel
Zener diode - Wikipedia
Diodes, LEDS and Zener Diodes
