Hickok 539B/C Calibration

Hickok 539B/C Calibration

• Introduction

Introduction

Daniel Schoo produced a classic document on calibrating a Hickok 539B/C tube tester which was published in 2007 on AudioXpress.

Unfortunately it contained some inconsistencies and was not valid for 230VAC systems.

With Daniel's agreement, I have updated, reformatted and corrected the document and made it available here as version V4.1. At some stage I'll generate a web version, but for now here it is as a PDF - please refer to this page for the document as it may well be upgraded in the future and should only be distributed with Daniel's permission: