Specifications

Feel the need for maximum
legal HF output power?
AMERITRON’s AL-1500 will
give it to you.
Using the Herculean
3CX1500A/ 8877 ceramic tube with its high
power gain, the AL-1500 needs only 65 watts
of drive from your exciter to deliver the
goods-- transceivers and other exciters just
loaf at 1500 watts out.
Cool, efficient operation is provided by a
forced-air system with tube chimney, using a
commercial grade die-cast ball bearing blower
for maximum tube life. The tube is further
protected by time delay starting and automatic
over-current shutoff to remove drive power if
the amplifier is mis-tuned.
Yo u get full legal power output from a
whisper quiet desktop linear. Measures 18
1
/2D
x17Wx10H inches, and covers all bands, 160-
15 Meters, including WARC and MARS (80%
of full output set to nearest amateur band).
10/12 Meters modifiable.
Yo u get 1500 watts output (1/2
hour continuous carrier) and
2500 watts (30 second continu-
ous carrier and 2500 watts-
plus 30 minute PEP two-
tone test). You get all this
power, plus, 65% effi-
ciency, pi-network
tuned input, Pi/Pi-L
output, inrush current
protection, multi-volt-
age transformer, QSK compatability, and a
one-year warranty.
The guts of the AL-1500 is its heavy
duty power supply, with a 32 lb. Peter
Dahl Hypersil
(R)
trans-former using a high
silicone steel core, computer grade capaci-
tors (33 mfd total), heavy duty bleeders
and twenty 3 amp, 1000 volt power recti-
fiers give you a stiff 3300 volts fully
loaded.
The AL-1500 is built on a rugged steel
chassis with a separate RF compartment
fully shielded to keep RF from leaking out,
keeping RFI and TVI to a minimum.
Superb RF design and layout, Hi-Q tank
circuit and commercially rated RF power com-
ponents give you 65% plate efficiency over the
entire operating range. Power goes into the
antenna instead of into heat.
50-ohm broadband Pi-Network tuned in-
put with slug-tuned coils is used. Even fussy
solid state transmitters deliver full power!
A carefully designed Pi/Pi-L output net-
work using the optimum Q for each band with
vernier ball drives gives smooth tuning, wide
matching range, full band coverage, and peak
performance at all power levels.
The AL-1500’s grid overload circuit pro-
tects the tube from excessive grid current; if
175 mA of peak gric current is reached, the
“OPR” LED will no longer light and the
amplifier will go into a bypass condition until
reset by the operator.
Transformer provides many options
Since excessive
line voltage stresses
components (low
line voltage causes a
“soft tube” effect, for
example),
Ameritron’s exclu-
sive Multi-Voltage
Power Transformer
TM
lets you optimize for
different line volt-
ages. Select from 4
different primary voltage ranges, from 205-219
VAC to 252 to 265 VAC. The amplifier comes
wired from the factory for 240 VAC.
The AL-1500 has two illuminated panel
meters. Grid Current meter provides continu-
ous reading of the critical grid current and
indicates proper, safe amplifier operation.
The other meter can be selected to read
Plate Voltage, Plate Current, Peak RF Watts,
or ALC. A SSB/CW selector switch chooses
bias voltage for best linearity on SSB or low-
est dissipation on CW.
The Operate/Standby switch, in Standby,
maintains the tube’s filament and plate volt-
ages while allowing “barefoot” operation.
Includes 12 volt DC auxiliary jack and an
“XMT” LED to provide indication of proper
amplifier keying by the exciter. Power
required: 240 VAC, 15 amps.
Frequency coverage: 1.8,3.5,7,14, 21 MHz &
Warc bands. User-modifiable for 28 MHz (FCC
license required).
Size:18
1
/
2Dx17Wx10H”. 77 pounds. UPS ship-
pable, 3 boxes.
Ameritron’s AL-1500 Amplifier with Eimac
(R)
3CX1500A7
6 www.ameritron.com
Ameritron’s 3CX1200A7 Amplifier
Ameritron’s Dual 3-500Z Amplifier
Ham Radio’s toughest tube --
the Eimac
(R)
3CX1200A7 is in
ham radio’s toughest amplifier!
It has a 50-Watt control grid dis-
sipation. It also has the same
super heavy duty power supply
that’s in our AL-1500 amplifier
that
loafs at
full power. A 3CX1200A7
has the lowest quantity histo-
ry of field replacement of any
modern transmitting tube that
we use. It has the ruggedness and power han-
dling of ceramic tubes combined with the
long-life of thoriated tungsten filaments.
This classic linear gives you full legal
output using a pair of 3-500Z graphite tubes.
Examine the features and com-
ponent ratings of the AL-82 and
compare it to any competing
amplifier using two 3-500Zs.
Most competing amplifiers using
3-500Zs can’t give you 1500
Watts because their lightweight
power
supplies
can’t use these tubes to
their full potential. Our
AL-82 amplifier uses the
same Peter Dahl
Hypersil
(R)
power trans-
former and used in the AL-1500 and AL-1200
amplifiers -- powerful stuff, just loafs at full
power!
AL-1200
$
2645
Suggested Retail
AL-82
$
2645
Suggested Retail
AL-1500
$
3045
Suggested
Retail
AMERITRON super legal limit amplifiers
These three rugged linears all use a super heavy duty
Hypersil
(R)
power supply capable of 2500 Watts!
An inside look at the AMERITRON AL-1500
Peter Dahl Hypersil
(R)
transformer weighs 32 lbs.
Add-on Electronic Bias System . . .
$
39
95
for AL-80A/82/1200/1500 Amps
EBS-1, $39.95. EBS reduces heat by
reducing quiescent current to low values
during periods when exciter output falls
below 100 mW. Features remote detec-
tor board. EBS-1H, $49.95, for other
amplifiers. Call 662-323-8211 for details.