Heathkit EUW-27 sine-square wave signal generator specifications Taken from a 1968 Heathkit catalog, page 90. Heath Malmstadt-Enke Lab Instruments EUW-27 Sine-Square Generator * Less than .25% sine wave distortion * Less than .15 microsecond square wave rise time * Sine and square wave output available simultaneously * 20 Hz to 1 MHz in 5 bands * Factory assembled and tested EUW-27, 14 lbs...(REA Express or Motor Frt. Only)...............$94.00 EUW-27 SPECIFICATIONS Sine wave Frequency range: 20 Hz to 1 MHz. Output volts (RMS): 0 to 10 volts, 0 to 1 volt, 0 to .1 volt, or 0 to .01 volt when working into a high impedance load Source Impedance: (+ or - 10%); 10 volt rante, 0 to 3.5k ohm; 1V, .1V and .01V range, 600 ohms Distortion: Less than .25%, 20 to 20,000 Hz. Frequency response: + or - 1.5 db 20 Hz to 1 MHz Square wave Frequency range: 20 Hz to 1 MHz Output volts: (P. to P) + or - 5%; 0 to 10 volt, 0 to 1 volt, 0 to .1 volt, into a high impedance load Source impedance: (+ or - 10%); 10 volt range, 0 to 220 ohm; 1V and .1V ranges, 52 ohm Rise time: less than .15 microsecond General Frequency accuracy: + or - 5% Power requirements: 105-125 V AC, 50/60 Hz, 55 watts Dimensions: 13" W x 8 1/2" H x 7" D (Data taken from Heathkit catalog by Henry Parsons)