UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Testing unknown transistors for max frequency response

Craig Sawyers · 10th Mar 2018, 3:51 pm

I've been remembering how the HP 250B works, and how it is used to measure current gain beta, and hfe in transistors. I also misquoted the specs - it goes from 500kHz to 250MHz.

Transistor measurements using this are in issues of Boonton Radio's "The Notebook" http://www.hparchive.com/Boonton.htm

The relevant issues are 6, 19, 20, 26 and 27.

10th Mar 2018, 3:51 pm	#18
Craig Sawyers Dekatron Join Date: Nov 2010 Location: Oxford, UK. Posts: 4,981	Re: Testing unknown transistors for max frequency response I've been remembering how the HP 250B works, and how it is used to measure current gain beta, and hfe in transistors. I also misquoted the specs - it goes from 500kHz to 250MHz. Transistor measurements using this are in issues of Boonton Radio's "The Notebook" http://www.hparchive.com/Boonton.htm The relevant issues are 6, 19, 20, 26 and 27.