• Document: RANGER 811H LINEAR AMPLIFIER
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RANGER 811H LINEAR AMPLIFIER Operating Manual 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 SECTION 1 SETTING UP AND INSTALLATION SETTING UP After unpacking the amplifier but before connecting, please carry out the following checks: a) Check your amplifier is not damaged and is complete. b) Ensure you have a reasonable airflow at the rear of the site you have chosen to install your amplifier. c) Ensure ALL connectors to be used by yourself are of a sufficient electrical standard to carry the higher RF output generated by the amplifier and any in-line power meter is of a type designed to carry the higher output power of a linear amplifier. d) Never attempt to operate the Ranger without first connecting an antenna or 50ohm dummy load. e) Check that the front panel switches of the amplifier are switched to STBY and OFF. CONNECTIONS Connect the amplifier as follows: a) Switch your HF transceiver OFF. b) Connect a suitable antenna or dummy load to the amplifier SO239 OUTPUT (ANT) socket or to a suitable POWER METER, which is connected to an antenna or dummy load. c) Connect a coaxial cable from the transceiver output to the amplifier SO239 INPUT (TX) socket. d) Connect the PTT lead to the PHONO socket on the amplifier and to your transceiver. e) Connect the mains lead to a suitable 220-240V mains supply. f) If desired, connect the ALC PHONO socket to the ALC on your transceiver. 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 (1) INITIAL TUNE-UP a) Switch the ON/OFF switch to on. (There is a slight delay whilst the soft-start activates but there is no warm-up time necessary). NB. While the STBY/OP switch is in the STBY position your transceiver will be able to operate as before i.e. straight into the antenna. b) Switch your transceiver on. c) Pre-tune the amplifier by switching the amplifier BAND switch to the desired band e.g. 20 for 20 metres (14MHz). TUNING UP THE AMPLIFIER a) Set the TUNE and LOAD controls on the amplifier as shown on your supplied tune-up guide sheet (at the back of this handbook). b) Select half-power (approx. 50 Watts) on your transceiver. c) Switch to TUNE or CW on the transceiver. d) Switch the amplifier STBY/OP switch to OP (operate), rotate the TUNE and LOAD controls for maximum RF output using your external power meter or using the RF-OUT meter on the amplifier. e) Your external Wattmeter should now show approx. 400W. f) Switch your transceiver to full power i.e. 100W and immediately peak the TUNE and LOAD controls for maximum RF output. g) The ALC can now be used to set the desired power output level into your antenna. h) Switch your transceiver to the mode you require and operate your equipment as normal. NB. Under normal operating conditions, the plate current with full drive will rise to between 0.75A and 1 Amp, and the grid current up to 300mA max. With no drive, the plate standing current is normally around 100mA. 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 (2) SECTION 2 FRONT PANEL CONTROLS ON/OFF SWITCH………………………….Mains power on and off STBY/TX SWITCH………………………..Amplifier standby/operate switch BAND CHANGE SWITCH………………..Marked 10 12 15 17 20 30 40 80 & 160 PLATE METER…………………………….0 - 1.5A GRID METER………………………………0 - 400 mA TUNE………………………………………..Plate tune control LOAD………………………………………..Pi tank load control RF SET & RF OUT METER………………..Used together as a tuning up meter, sensitivity is set up by the RF SET knob READY LED………………………………..Shows that the amplifier is switched on and is ready to operate ON AIR LED………………………………..Indicates that the amplifier is in the transmit mode and has been operated from the transceiver ALC CONTROL…………………………….The ALC circuit is controlled from the front panel, the OFF position is fully anti-clockwise. The amplifier will deliver full output when the ALC switch on the front panel is switched OFF. The output of the amplifier can be controlled by the ALC control. (3) REAR PANEL FAN…………………………………………………………Papst Low Noise axial fan

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