Ranger AMP_UK_811H User guide

RANGER 811H

LINEAR AMPLIFIER

Operating Manual

WiMo Antennen und Elektronik GmbH

Am Gäxwald 14, D-76863 Herxheim Tel. [phone] FAX 6978

http://www.wimo.com e-mail: [e-mail]

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. [phone] FAX 6978

http://www.wimo.com e-mail: [e-mail]

(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. [phone] FAX 6978

http://www.wimo.com e-mail: [e-mail]

(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

NB. Air blows out of amplifier via this fan.
Ensure that airflow is not obstructed.

FUSE………………………………………………………………1 ¼ in fuse, 10Amp

MAINS……………………………………IEC socket, connect to 230V Mains supply

TX……………………………………..SO239 connector, coaxial connection to driver

ANT…………………………………SO239 connector, coaxial connection to antenna

PTT………………………………….Phono socket, when earthed via the transceiver,
puts the amplifier into the transmit mode as long

as the STBY/TX switch is in the TX position.

ALC…………………………Phono socket, connect to the ALC socket on transceiver

EARTH……………………………………………Connect to a suitable external earth

WiMo Antennen und Elektronik GmbH

Am Gäxwald 14, D-76863 Herxheim Tel. [phone] FAX 6978

http://www.wimo.com e-mail: [e-mail]

(4)

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. [phone] FAX 6978

http://www.wimo.com e-mail: [e-mail]

(5)

SECTION 4

POWER SUPPLIES

There are three separate voltages in the Ranger 811H amplifier:-

1. HIGH VOLTAGE, which is 1700Volts, the main voltage applied to the

valve anodes.

2. HEATER SUPPLY is 6.3V, supplied from the toroidal transformer.

3. CONTROL VOLTAGE is 12 Volts, used for pulling in the TX/RX relay

and gives the LED the control condition of the amplifier.

CIRCUIT

Class AB2 Grounded grid with tuned cathode input.

FREQUENCY COVERAGE

1.8 - 2.0 MHz

3.5 - 4.0 MHz

7.0 - 7.5 MHz

10.0-10.5 MHz

14.0-14.5 MHz

18.0-21.5 MHz

24.0-30.0 MHz

Covering all the WARC bands

(6)

SECTION 5

SPECIFICATIONS

MAINS SUPPLY

220 - 240 Volts AC, 50Hz

DRIVE POWER

0 - 100 Watts

RF OUTPUT - SSB

100W Drive = 800W output
40W Drive = 400W output

RF OUTPUT - RTTY

50W Drive = 300W RMS continuous

RF OUTPUT - CW

100W Drive = 800W

FRONT PANEL CONTROLS

Mains ON/OFF
Standby/Operate switch
Band change switch
ALC control
Tune control
Load control
RF set control
RF/Grid switch

(7)

METERING

Plate, Grid and RF output

LED's

Ready to operate (red)
Amplifier on air (green)

CABINET

Charcoal grey with matching front panel

SIZE (Overall dimensions - including feet, rear fan and front panel knobs)

W 14in H 9.5in D 16in
355mm 240mm 405mm

WEIGHT

25kg

WiMo Antennen und Elektronik GmbH

Am Gäxwald 14, D-76863 Herxheim Tel. [phone] FAX 6978

http://www.wimo.com e-mail: [e-mail]

(8)

WARRANTY

Linear Amp UK Ltd warrants to the original purchaser that this product
shall be free from defects in material or workmanship for 12 months from
the date of the original purchase. Valves are excluded from this warranty.

Notification should be given as soon as possible after discovering a
possible defect. Carriage charges for any parts or units submitted for
replacement or repair under this warranty must be paid by the purchaser.

Correct maintenance, repair and use are important to ensure proper
performance from this product. Carefully read the operating manual. This
warranty does not apply to any defect Linear Amp UK Ltd determines is
caused by (1) improper maintenance or repair, including the installation
of parts or accessories that do not conform to the quality and specification
of the original parts; (2) misuse, abuse, neglect or improper installation;
(3) accidental or intentional damage; (4) acts of God.

Linear Amp UK Ltd is not responsible for damage to other equipment or
property or any other consequential or incidental damage of any kind.

This warranty is not transferable from the original owner on sale of the
unit to another.

WiMo Antennen und Elektronik GmbH

Am Gäxwald 14, D-76863 Herxheim Tel. [phone] FAX 6978

http://www.wimo.com e-mail: [e-mail]