FOR SALE: Multi Elmac AF67 Transmitter from an estate. Appears complete, but sold as-is, untested.
This AM-CW Transmitter as ten tubes and uses VFO or Crystals to cover SEVEN (7) bands Some have also modified these rigs for DSB operation. The MULTI-ELMAC AF-67 "Trans-Citer" is a ten-tube variable frequency or crystal controlled seven band transmitter or exciter. All circuits are simultaneously switched to the desired band by a single bandswitch lever. Designed as a complete transmitter for mobile or fixed installations, or an exciter to drive a higher power transmitter. When used as an exciter the 500 ohm tap on modulation transformer can be used to drive the higher power modulators. DIMENSIONS. The maximum external dimensions of the AF-67 Trans-citer, excluding projections of control knobs, is 11 1/4 inches wide, 7 inches high, and 8 1/2 inches deep behind panel. Approximate weight is 18 pounds. CIRCUIT DESCRIPTION. The AF-67 Trans-citer employs a variable frequency oscillator with output on wither 1.75 to 2.0 Mc. or 3.5 to 4.0 Mc. In addition to the V.F.O. feature, two crystal positions are included for operation on two spot frequencies. Any crystal that will work straight through, double of quadruple to the desired frequency may be used. The oscillator circuit employs a voltage regulator tube to maintain the plate voltage at a constant level. The multiplier stages are broad tuned with a front panel control for peaking the final grid, insuring best performance on all bands. The audio circuit is designed to use either a carbon microphone or a low output microphone such as a crystal or dynamic. A slide switch on the rear apron on the AF-67 Trans-citer sets up the circuit for use with either type of microphone. A reactance tube modulator is incorporated in the variable frequency oscillator circuit for narrow-band-frequency-modulation. The variable frequency oscillator dial scale is directly calibrated in megacycles for each of the amateur bands. Looks fairly average. No power supply is included. E-mail me for pictures if desired. Available for $75.00 plus shipping. Regards - Bry Carling, AF4K _______________________________________________ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
