Note
Kit or wired
QST. Nov 1956, p. 99.
CQ, Apr 1957, p. 18.
QST, Oct 1957, p. 171. (MM-2)
QST, Nov 1960, p. 119.
CQ, Nov 1962, p. 153. ("Close out")
CQ, Jan 1964, p. 100. ("Limited quantities")
The MM-1 provided continuous monitoring of CW, AM, and SSB signals. Automatic blanking protected the 3 inch scope tube from burn-in during stand-by periods. The MM-1 's response curve was flat from 1-55 MHz. lt had a built-in 1 kHz tone generator and displayed AF and RF trapezoid and envelope patterns.
The MM-2, added receiver monitoring. Plug-in modules adapted the MM-2 to various receiver intermediate frequencies.
– Broadband response flat 1 MC to 55 MC at power levels of 5 watts to 5 KW.
– New (in MM-2) variable sweep control for transmit and receive.
– RF attenuator controls height of pattern. Calibrated in 3 DB steps.
– Function selector for ENVELOPE, TRAPEZOID and BOW-TIE patterns on transmit. For SSB, DSB, AM and CW.
– Built-in 1 KC audio oscillator, less than 0.5% distortion.
– For use in series with 52-72 ohm coax lines. A short pickup antenna may be used with other systems.
MM-2 plug-in IF adaptors (factory wired)
– RM-50 (50 KC), RM-80 (60-80 KC)
– RM-455 (450-500 KC)
Tubes
(1) 6AL5 (under the chassis)
CRT: 3BP-1A
Out of production by late 1962, but still available for a year or so from a few distributors. See for example the Amateur Electronic Supply ad in QST, Jun 1963, p. 152. "We bought the entire factory stock..."
