HW-10 6-Meter "Shawnee" Transceiver
HW-20 2-Meter "Pawnee" Transceiver
- Transmitter—receiver—power supply . . . all in one
- 10 watt RF output to antenna—360 final
- Tracked VFO and exciter stages for single knob tuning
- Built-in low pass filter—push-to-talk microphone
- Built-in 3-way power supply for 117 V. AC, 6 or 12 V. DC
- Ideal for use in CAP & MARS operations
For "mobile" or "fixed" station use ... feature-packed TRANSCEIVERS for 6 & 2 meters
Clean, functional styling and superb engineering team up to bring you unprecedented performance on the VHF amateur bands in the new Heathkit 6 meter "Shawnee" and 2 meter "Pawnee"! Both models offer complete versatility and operating convenience either as a fixed or mobile station.
The transmitters feature a built-in temperature stabilized VFO and switch-selection of four crystal positions for net, novice, CAP and MARS operation; tracked VFO and exciter stages for convenient single knob tuning over any 500 kc band segment; a "spotting" switch to zero-in signals with transmitter off-the-air; efficient 6360 final RF amplifier for 10 watt output to antenna; built-in low-pass filter to suppress harmonics and other spurious radiation; dual-purpose modulator which doubles as a 15-watt PA amplifier with an added, external speaker; and push-to-talk ceramic element microphone with coil cord and mounting clip.
The sensitive superheterodyne receivers feature double conversion with first oscillator crystal controlled; voltage regulation on all oscillators for high stability; large, illuminated slide-rule dial for both receiver and VFO; an automatically switched panel meter to read received signal strength or relative power output; front panel squelch and noise limiter controls for maximum clarity, minimum noise; 3" x 5" PM speaker for excellent tone; and RF gain, BFO, and AVC on/off controls. The built-in 3-way power supplies feature transformer operation on 117 V AC and heavy-duty, full-wave vibrator for 6 or 12 V DC operation. AC and DC cables are furnished. A primary fused relay controls all power to the transceiver in mobile installations. Sturdy construction features wrap-around steel case, extensive shielding of transmitter, receiver and power supply sections. Mounting bracket included. Recommended for the more experienced kit builder. Average construction time is 70 hours.
SPECIFICATIONS—RECEIVER SECTION—Frequency coverage: HW-20; 143.8 to 148.2 mc. HW-10; 49.8 mc to 54.0 mc. IF frequencies: Double conversion—First IF, 22 to 26 mc (tunable); Second IF, 2 mc. Noise figure: HW-20; 8.5 db or less, HW-10; 6 db or less. Sensitivity: .5 microvolts of input signal will provide an output signal better than 10 db over the noise level. Squelch sensitivity: Less than 1 microvolt. Selectivity: 15 kc at 6 db down. Image rejection: Better than 70 db. IF rejection: 50 db. Input impedance: 50 to 72 ohm, unbalanced. Audio power output: 3 watts (receiver operation); 15 watts (public address operation). Headphone jack: Low impedance, accepts PL-55 type plug (standard 2 conductor ¼" sleeve). External speaker socket: 8 ohm impedance, accepts RCA type phono plug.
TRANSMITTER SECTION—Frequency coverage: HW-20; 143.8 to 148.2 mc. (crystal or VFO control), HW-10; 49.8 to 54.0 mc. (crystal or VFO control). Modulation: .01 volts minimum at 1000 cps = 100%. RF power output: 8 watts nominal AM, 50 ohm; 10 watts nominal CW, nonreactive load. Distortion: 10% or less with 100% modulation at 1000 cps. Output impedance: 50 to 72 ohm, unbalanced. Low pass filer: HW-20; 152 mc cutoff frequency. HW-10; 54 mc cutoff frequency. Key jack: Accepts PL-55 type plug (standard 2-conductor ¼" sleeve). Crystal sockets: Accepts FT-243 type holders, pin diameter .093", pin spacing .466". Microphone: High impedance ceramic element push-to-talk type with coil cord. Crystals: (Not furnished) HW-20; 8 mc fundamental range (8.000 to 8.222 mc for 2 meter band). HW-10; 8 mc fundamental range (8.333 to 9.000 mc for 6 meter band).
GENERAL—Power requirements: Input voltage: 6.3V DC, 12.6V DC, 117V AC. Transmit—14.5 amps, 7.5 amps, 120 watts. Receive—8.5 amps, 4.5 amps, 60 watts. Cabinet dimensions: 6"H. x 10"D. x 12"W.