Heathkit AW 1 Schematic

Page 1

HEATHKIT AUDIO WATTMETER

MODEL AW-I

SPECIFICATIONS
Frequency ReSpOnse ............. . . . . ...... 41 db, 10 cycles" to 250 kc
Wattage Range. . . . . . . . . . . . . . . . . . . ......... 0-5 milliwatts, 50 milliwatts, 500 milliwatts, 5
watts, 50 watts full scale.
DB Ranges ............................... Total range, -15 db to +48 db, scale -5 to +18 db

(1 mw - 600 S2). Five switch selected ranges from
-10 db to +30 db.

Load Resistors ................... . . . . . . . . .4 $2, 882, 16 $2 and 600 $2 -non-inductive, switch
selected.
Audio Input Power Ratings. . . . . . . . . ...... . . Upto 25 watts maximum continuOus duty, 50 watts.

maximum intermittent. Duty cycle 50 watts is 3
minutes. Ventilatedcabinet allows efficientcool-

mg.
Multipliers .............. . . ....... . . . . . . . . .Precision type
Meter .................. . . . . . . . . . . . . . . . . . . 4 1/2" streamlined case with 200 microampere
movement.
Meter Rectifier ........ . ................ . . .Crystal diode bridge for wide range frequency
' response.
Tube. . . . . . ..... . ...... . ...... . . . . . . . . . . . . 12AU7 - voltage amplifier and current amplifier
for meter.
Power Supply ............................. Power transtrmer and selenium rectifier
Power Requirements. . . . . . . . ............... 105-125 volt AC, 50/60 cycle, 6 Watts
Dimensions. . . . . .......................... '7 3/8" high x 4 11/16" wide x 4 1/ " deep
NetWeight. ............. ...... 31bs.

Shipping Weight ........................... 6 lbs.