General Description; Hf Part - OM POWER OM2000A+ Manual

The amplifier must be installed in such a way that free flow of hot air from the tube is allowed. The amplifier
must not be installed in a constrained surrounding (i.e. tight shelves etc.). During long time operation
ventilation grid can reach high temperature. Do not touch it!
The amplifier must be properly grounded during operation
During operation the amplifier must be installed in such a way that the rear side remains accessible.
The amplifier is an A category product. In a household it can influence other electric appliances. In such cases
the user is to take proper actions to mitigate this disturbance.
Read this manual carefully. Fallow all of instructions during installation and operation to avoid damage to the
amplifier not covered by manufacturer´s warranty! Do not attempt to perform any change of hardware or
software!
3.

GENERAL DESCRIPTION

3.1.

HF part

T
his amplifier is using a ceramic tetrode FU-728F in a grounded-cathode circuit (input into control grids). The
OM2000A+ amplifier achieves excellent linearity by the voltage stabilization of the control grid bias and the
screen voltage. The power input is given to the control grids, using a broadband input circuit with an input
impedance of 50 Ohms. This adaptable input circuitry ensures a good input SWR (better than 1.5 : 1) on all
amateur bands.
CAUTION
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