Experiments with Coils and Q-Measurement Wes Hayward, w7zoi, October, 2007 ( Updates 01Dec07,08 Dec08 . ) I recently became interested in building a"Zero Power Receiver (ZPR)", a circuit that would receive the AM broadcastband while using no external power.
Some Thoughts on Breadboarding W7ZOI, Jan2,2000, update June 10,2000, Feb 23,2002. Reinstated on 23July03, modified 25March04,16July06,5March07.
Overview of W7ZOI Power Meter Designed by W7ZOI and published in June 2001 QST. Uses an AD 8307 log amplifier to provide an output voltage proportional to the logarithm of input signal.
Available from: http://www.sss-mag.com/pdf/saosc.pdf 2 Hayward, Wes, W7ZOI, Introduction to Radio Frequency Design, (The American Radio Relay League: 1994) ...
I would recommend you go through the test equipment sections of the Handbook and Wes Hayward's, W7ZOI, "Solid State Design for the Radio Amateur".
Basic Amplifier Analysis in SPICE WesHayward, w7zoi, 12 Jan07 This is a collection of simulations done to investigate a very basic feedback amplifier.
You can contact Wes at 7700 SW Danielle Ave, Beaverton, OR 97008; e-mail email@example.com . Terry can be reached at 9480 S Gribble Rd, Canby, OR 97013; e-mail firstname.lastname@example.org .
1 RF Application Reports FIELD EFFECT TRANSISTOR RF AMPLIFIER DESIGN TECHNIQUES Prepared by: Roy C. Hejhall Applications Engineering Amplifier design theory utilizing the two port network model for an active device has been well developed and used extensively in bipolar transistor high frequency ...
The first of these was the Analog Devices 2 AD8307, good to 500 MHz; W7ZOI and W7PUA used this chip to make a simple RF power meter 1. New chips that work at higher frequencies have become available recently.
Wes Hayward has been licensed since 1955 as W7ZOI and is now retired from a career in electron‑device physics and later, in circuit design.
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