Note
QST, Jun 1947, p. 119.
Some info: Allied catalog, 1948, page 162.
Lafayette catalog number 89, p 172.
QST, May 1954, p. 115. (probably NOS)
The MB-611 was suitable for either mobile or fixed narrow-band FM operation on 6 and 11 meters. It ran 40 watts input and had a pi-network to match a variety of antennas. It required an external power supply.
Uses "exclusive Sonar phase modulator." Crystal controlled, but will accommodate an external VFO.
Tuning capacitors are screwdriver set with locking nuts. Features a dual "magic eye" indicator for tuning and deviation. Deviation is adjustable from 2 to 3 kHz.
Input for crystal or dynamic mic with an output of –52 db or better.
Will match "any type" of antenna or feed line.
Supplied with 10/11 meter coils. Six meter coils optional.
Output power: approximately 22.5 watts
Power requirements: 200 to 600 VDC @ 100 mA
6 volts @ 2.6 amps standby, 10 to 20 amps transmit.
