Note
The HA-14 is essentially an SB-200 without an internal power supply. It was released about a year after the SB-200 and is designed primarily for mobile use (specifically with the Single-Bander series), though it also was promoted for use in a fixed station. Heath made two power supplies to match the HA-14. The HP-14 mobile power supply and the HP-24 AC supply. The HA-14 can be used with virtually all of Heath’s transmitters and transceivers, but seems to have been designed with the Single-Banders (HW-12(A), 22(A) and 32(A)) in mind, as the width and depth of the amplifier is a perfect match.
Like the SB-200, the KW Kompact uses a pair of 572B (T-160L) tubes and covers 80 through 10 meters. It uses a pre-tuned broadband input and provides 1000 watts input PEP with 100 watts of drive.
There are two important operating consideration: 1) The HA-14 has no load control in the pi-network output circuit. Instead it uses a fixed capacitor. This limits its ability to work with antennas that are a bit off tune. 2) There is no fan. The amp is convection cooled. This means you can’t run it as hard as the the SB-200. For example, the SB-200’s SSB duty cycle is 100%, but the HA-14’s SSB duty cycle is only 50%. For CW operation Heath said “the duty cycle must not exceed the normal telegraphy duty cycle of 33% maximum.”
References:
Review. 73 Amateur Radio. Oct 1965, p. 88.
Review (Incorrectly called HW-14 in review). QST. Nov 1965, p. 89.
Review. CQ. Feb 1966, p. 52.
Improvements. CQ. Jul 1967, p. 68.
160 meters. Ham Radio. Aug 1975 p. 8
Band coverage: 80, 40, 20 15, and 10 meters
Maximum power input: 1000 watts PEP
Duty cycle: see text
Driving power: 100 watts
Third order distortion: –30 db or better at 1000 watts PEP
Output impedance: 50 to 75Ω unbalanced, SWR not to exceed 2:1
Input impedance: 52Ω unbalanced; broadband pre-tuned input circuit requires no tuning
Meter function: 0–6 relative power; 1:1 to 3:1 SWR
Power requirements: 2000 VDC at 500 mA, –110 VDC at 60 mA, and 12.6 volts AC or DC at 4 amps. These voltages can be provided by two optional power supplies: the HP-14 (not to be confused with the HP-13) mobile supply, or the HP-24 (not to be confused with the HP-23) 120 VAC supply.
Size: 12.25 wide x 3.25 high x 10 deep; Weight: 7 lbs
Tubes: (2) 572B / T-160L
Photos, general information and specifications from "Heathkit: A Guide to the Amateur Radio Products," by Chuck Penson, WA7ZZE. Used with permission.
