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Multiband HF Projects - Pre-Amplifiers

Masthead PreAmp by SMØVPO
I have received several requests for a masthead preamplifier for use in the VHF spectrum. The power and switching circuitry may be made independant of the frequency so here I have presented two versions of a circuit I used ...
http://sm0vpo.altervista.org/antennas/preamp-0.htm

Push-pull HF preamplifier with 2x2N5109 by IN3OTD
I have built the push-pull preamplifier for the HF bands described some years ago in the Mar/Apr 2003 issue of QEX; its performances are quite good and the measurements I have done practically confirms the specifications stated in the article.
https://www.qsl.net/in3otd/ham_radio/2N5109_PP_pre/2N5109_PP_pre.html

Creation date : 31/08/2018 @ 00:36
Last update : 06/07/2024 @ 11:46
Category : Multiband HF Projects
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