Note
This small power supply was designed specifically for the VF-7401, but will also power the HW-202 or HW-2036. In size, shape and size it is an exact match for those two-meter radios, though color is different.
The VFA-7401-1 provides 13.8 volts nominal, rated at 4 amps for 20 minutes (40% duty cycle), or 3 amps continuously. The 120 VAC fuse is accessible from the rear panel. The low voltage fuse is mounted internally.
Output voltage: 13.8 VDC regulated (adjustable from 12 to 15 VDC)
Output current: 4 amps, 40% duty cycle @ 13.8 VDC, 3 amps continuous
Regulation: better than 1.5% from no load to full load (3 amps)
Power requirements: 120/240 VAC, 50/60 Hz, 85 watts maximum
Solid State:
diodes: (1) 1N4002, (1) 10A20 bridge rectifier
transistor: (1) 2N3055
integrated circuit: (1) µA778G
Photos, general information and specifications from "Heathkit: A Guide to the Amateur Radio Products," by Chuck Penson, WA7ZZE. Used with permission.