Tube List: 0C3/VR105 (2), 5R4 (1), 5V4 (3), 6A10 (1), 6AL5 (1), 6AQ5 (4), 6B4 (2), 6BA6 (3), 807 (1), 810 (2),
872A (2), 12AU7 (2), 12AX7 (1), 4-250A (2).
The Collins KW-1 is a complete kilowatt AM and CW amateur transmitter with built-in VFO and bandswitching. The power amplifier is rated at 1000 watts input on the 80, 40, 20, 15, 11 and 10 meter bands, and 500 watts on the 160 meter band. Two 810 modulator tubes operating in push-pull provide 100% modulation to the power amplifier stage. A speech clipper followed by low level and high level low-pass filters provide for increased power in the AM sidebands without over-modulating. The variable frequency oscillator (VFO) is a stable, hermetically sealed unit that is permeability tuned by powdered iron core coils. Additional features include CW muting for a 75A receiver, a CW sidetone oscillator, TVI reduction, a blower, door interlock switches, fuses and an overload relay. The exciter tuning is ganged to one control and the entire rf section is tuned by the frequency selector control. A vacuum variable capacitor provides high reliability for tuning the final amplifier tank circuit. The pi-L output circuit is designed to match an unbalanced resistive load of 52 ohms. The exciter tuning dial shows the frequency in kilocycles for each of seven amateur bands.
160, 80, 40, 20, 15, 11, 10 meters
70E-14 Variable Frequency Oscillator (VFO).
RF OUTPUT IMPEDANCE:
230 v, 3 wire, 50/60 cycle, single phase; or 115 vac, 2 wire, 50/60 cycle, single phase.
POWER INPUT REQUIREMENTS:
The maximum overall input power requirement is 3100 watts for 100% sine wave modulation and 2280 watts with no modulation.
PA PLATE POWER INPUT:
The nominal rated power input of the KW-1 is 1000 watts (500 watts on 160 meters).
Audio distortion is less than 8% at 90% modulation with a 1000 cps input frequency.
Within 2 db from 200-3000 cps.
66 1/2" high, 28" wide, 18" deep.