Dear 160 Meters Topband reflector friends:
Check W8JI, Tom web site with test reports on preamplifier commercial units
at: http://www.w8ji.com/pre-amplifiers.htm.
For an in-dept 11 pages article about high performance push-pull HF
preamplifier and high performance pass-band filters comparison with
practical data for amateur bands Cauer vs. Butterworth configuration (with
a particularly good shape factor performance in low bands) get a copy of
March/April 2003 QEX magazine (ARRL), with more preamplifier performances
data and one errata corrige in the next coming May-June 2003 QEX issue,
Letter to the Editor (this Letter to the editor file is already available in
down load from my web site at
http://www.qsl.net/ik4auy/qex_march_april_03.htm, then from this page click
the green color "Errata Corrige page", then click the red color "QEX
March/April 2003 Article Errata Corrige and preamplifier performance."
linked page.
Hope you find of some interest. Best 73.
The author: Sergio, IK4AUY (IR4B)
One of IY4FGM Marconi Memorial Station.
Also AC7PC US license.
MCC Marconi Contest Club member.
http://www.qsl.net/ik4auy/
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