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SECTION 3
CIRCUIT DESCRIPTION
FEATURES Four vertically mounted 811A valves
Class AB2 Grounded Grid
Excellent IMD products
Soft-start circuit
Variable threshold level type ALC circuit
Matches modern HF equipment
INTRODUCTION The Ranger 811H linear amplifier is a high powered grounded
Grid linear with a tuned cathode input circuit. The amplifier is
designed around the much improved 811A valve.
Operation design is for the 1.8 3.5 7 10 14 18 21 24 28
MHz amateur bands.
RF UNIT This is a conventional high Q, Pi tank design which gives good
harmonic attenuation with very little through-loss of RF.
RF INPUT A separate tuned circuit is selected on each frequency band to
keep harmonics suppressed and to give your transceiver a good
50 ohm input load while driving the linear amplifier.
WiMo Antennen und Elektronik GmbH
Am Gäxwald 14, D-76863 Herxheim Tel. (07276) 96680 FAX 6978
http://www.wimo.com e-mail: info@wimo.com
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