AMERITRON AL-82 Manuel d'instruction - Page 3

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1. Inexpensive tubes: the AL82 uses a pair of rugged 3-

500z tubes.

2. Fast warm-up time:

seconds of warm-up time.

3. SSB/CW switch: the bias voltage is switched to provide

the best linearity on SSB or the lowest dissipation on

CW operation.

4. ALC Indicator: the drive level is detected to provide a

control voltage for the exciter. ALC prevents over-

driving of the linear and reduces distortion from ex-

cessive drive power.

5. Vernler Plate and Load Adjustments: both tuning con-

trols have vernler 6:1 reduction drives for smooth

tuning.

Input

Circuit type: Pi-network, slug tuned coils

maximum VSWR at resonance: 1.2:1 minimum 2:1

VSWR bandwidth:

20%

permissible: 130 watts typical drive for full power

output: 100 watts

Output

circuit type: Pi-L, Pi

hour continuous carrier: 1500 watts (Below 18mHZ)

/ 2

30 second continuous carrier: 1800 watts plus

hour PEP two-tone test: 1800 watts

/ 2

30 second PEP two-tone test:1800 watts plus

Power Supply

circuit type: full wave bridge, capacitor input no

load voltage: 3800V

full load voltage: 3300V full load current: .8 amp

regulation: 10% or better transformer: 32 lbs., hypersil

capacitors: 26 mfd total, computer grade maximum

draw at rated output: 13 amps at 240V AC -50/60 Hz

Tube

type (2) 3-500Z continuous dissipation: 1000

watts warm-up time: approximately 30

seconds

the 3-500z requires only a few

T E C H N I C A L S P E C I F I C A T I O N S A L - 8 2

maximum drive power

F E A T U R E S

6. Two Illuminated Panel Meters: the AL-82 has two il-

luminated panel meters. The Grid Current meter provides

a continuous reading of grid current and indicates proper

operation of the amplifier. The other meter reads Plate

Voltage (HV), Plate Current (IP), Peak RF Watts ( P O )

and ALC.

7. Operate/Standby Switch: filament and plate voltages are

maintained while allowing the amplifier to be bypassed

for "barefoot'' operation.

8. 12 Volt Auxiliary Jack: 12 volts at 100 mA is provide for

accessories such as the ATR-15 Antenna tuner.

9. XMT Indicator LED: provides a front panel indication of

proper amplifier keying by the exciter during operation.

Caution: This amplifier must be disconnected from the

power mains before removing the cover. See the warning on

page 10.

Metering: multimeter: plate current, plate voltage,

drive/ALC, power output (PEP watts). Grid: grid current

ALC: negative going, 0-20V, adjustable, phono jack

Efficiency CW: 65% typical

Efficiency SSB (envelope crest): 62% typical

MARSIWARC: yes, bandswitch set to nearest amateur band

Keying: requires relay closure or sinking to ground of

positive (+) 12 VDC at 100 mA, phono jack

RF Connectors: S0239

Line Connector: NEMA 6-15P 240V style

Dimensions: 18

1 / 2 "

Weight: 77 lbs.

Frequency Coverage: (AL-82)-1.8, 3.5, 7, 14, 18 and 21

MHz. User modified models cover 24 and 28 MHz. (AL-

82X/J)Export models-1.8, 3.5, 7, 14, 18, 21, 24 and 28

MHz.

Third Order IMD at Rated Output: -34 dB at 1500 w output

D x 17" W x 10"H