Note
The HD-1986 was another in a long line of little brown box products designed by Heath starting in the mid 80s in an effort to stay involved in ham radio.
The Microlizer is a fairly simple device that permits the user to tailor the audio of the station mic in an effort to “obtain maximum SSB output with a clearer sounding signal.” The HD-1986 permits a 12 dB boost or cut at 490 Hz and 2800 Hz, and overall microphone signal level into the transceiver.
The unit has a four-pin mic connector input, a 1/4” phone output jack, an on/off pushbutton, and controls for high, low, and level. The HD-1986 runs on a 9-volt battery. Note: The LED panel light lights only briefly when the power is turned on, indicating the state of the battery.
The Microlizer was on the market for only a couple of years, from Christmas of 84 to the Fall of 87.
Adjustable mic gain:
low cut or boost: ±12 db at 490 Hz
high cut or boost: ±12 db at 2800 Hz
Input impedance: 100kΩ nominal
Maximum input level: 500 mV rms
Frequency response: 200 Hz to 10 kHz
Distortion: 0.5% or less
Power requirements: one 9-volt battery
Photos, general information and specifications from "Heathkit: A Guide to the Amateur Radio Products," by Chuck Penson, WA7ZZE. Used with permission.
