Specifications

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2. INTRODUCTION
The 2m Discovery is a high quality linear amplifier which is designed around a GS 31
medium mu triode in grounded grid configuration. The amplifier uses a ¼ wave strip-
line in the output circuit and a tuned input circuit. The amplifier is forced air cooled to
give you the ability to operate at full output power for as long as you wish. The
recommended maximum drive is 100Watts.
The GS 31 must be allowed to warm up properly hence a 2 min. start up timer is
fitted. When the amplifier is switched on, the WAIT light will come on. After the time
has elapsed the WAIT light will go out allowing you to operate the PTT.
It is recommended that you use a Bird (or equivalent) power meter capable of
measuring 1500W at the correct frequency.
Please read the instructions carefully before operating the equipment. RF amplifiers at
this power level and frequency can be easily damaged by improper use. Please follow
the precautions on page 1 of this manual.
The Discovery is fully self-contained and has three separate voltages:-
1. HIGH VOLTAGE which is 2800V, the main voltage applied to the valve
anode.
2. HEATER SUPPLY which is 13V at 3A.
3. CONTROL VOLTAGE which is 12V used for the LED control condition
of the amplifier, 24V for pulling in the Tx/Rx relays.