SPECIFICATIONS

Gain:
Input Sensitivity:
Power Output:

Frequency Response:
Input Impedance:
Source Impedance:
Load Impedance:
Output Impedance:
Noise Level:
Controls:
Power Supply:
External Power Available:
Tubes:
Dimensions:
Color:
Weight:
Special Features:

68 db
0.9 volts

80 watts at less than 2% thd 60-20,000 cps
80 watts at less than 5% thd 40-20,000 cps

-- 1 db 5-30,000 cps, ~5 db 1-100,000 cps
70,000 ohm potentiometer
125/150 and 500/600 ohms with 15095 or 4665 plug-in transformer
4 (18 V), 8 (25 V), 16 (36 V), 62 (70 V) ohms ungrounded
Less than 15% of nominal load impedance
80 db below rated output
Volume control, continuously variable, composition
117 volts, 60 cps, 240 watts
117 volt AC receptacle on chassis
Two 6CG7, four 6CA7/EL34, two 5U4GB
S'IL" H, 19" W, 8" D
Green
27.5 lbs.

For 1500 series applications. This amplifier has a two-stage built-in
Hi-Pass filter.

ACCESSORIES

15095 or 4665 Plug-in Line Transformer.
See Amplifier Accessories sheet for relay racks, mounting cabinets, and other amplifier accessories.

ARCHITECTS AND ENGINEERS SPECIFICATIONS

The power amplifier shall be of the rack mounting type measuring not more than S'IL" H, 1F' W,
and 9" D. The amplifier shall include a continuously variable volume control of the composition
type on the front panel, together with pilot light, fuse holder, and on-oR switch. The front mat
shall be hinged for easy access to the front portion of the amplifier for maintenance. Any ampli-
fier utilizing a common "radio type" volume control and not including these features shall not
be acceptable under these specifications.

The power output shall be 80 watts with less than 2% total harmonic distortion over the fre-
quency range of 60 to 20,000 cycles, and 80 watts with less than 5% total harmonic distortion
over the frequency range of 40 to 20,000 cycles. The frequency response shall be ~1 db 5 to
30,000 cycles, or ~5 db 1 to 100,000 cycles. The noise level shall be 80 db below rated output.
The overall gain of the amplifier shall be no less than 68 db. The output impedance shall be less
than 15% of nominal load impedance. The load impedance shall be 4 (18 v), 8 (25 v), 16 (36 v),
62 (70 v) ohms ungrounded. The input sensitivity shall be .9 volts rms for rated output. The input
impedance shall be 70,000 ohm volume control, and the source impedance 125/150 and
500/600 ohms with 15095 or 4665 plug-in transformer. The amplifier shall operate from 117 v
60 cycles and shall not draw more than 240 watts from the primary circuit. The tube complement
shall consist of two 6CG7, four 6CA7/EL34, two 5U4GB. The unit shall be finished in green and
shall weigh in the order of 27.5 pounds.

Negative feedback must be derived from a tertiary winding in the output transformer. Amplifiers
employing grounded outputs or other means of feedback will not be acceptable.

The amplifier shall be Altec Lansing Model 1569A.

C P -- 1M -- 5-60

CAT. NO. AL -- 1405-1

PRINTED IH U.S.A.