Here are the promised photos of the 43-Set Converter and it's manual. I have done no restoration work on it at all other than a general cleaning and electrical check. It works perfectly.
These converters were built both in Canada by Electronic Laboratories of Canada Ltd and in the USA by Electronic Laboratories Inc. The two version are identical other than the differing name on the front data plate and the paint. Canadian converters were finished in Light Khaki Green wrinkle, with the inside of the cover Zinc Chromate Green. The American converters were wrinkle black finish with Zinc Chromate Green under the cover.
Information stencils were added by various components in yellow paint and these were preserved by the military when this converter was repainted Nato Gloss Green sometime postwar.
The vibrators in the converter are MTS-1114's. Two are mounted in sockets on the top of the chassis next to the transformer (which as you will notice, accounts for 3/4's of the weight of this sucker being on the right hand side). The right hand vibrator operates when 12-volt input is used. The left hand vibrator operates when 24-volt input is used. In either option, the alternate vibrator becomes the 'spare'.
Inside the cover are two sets of clips to hold the spare fuses: 15 amp for 24 volt operation and 30 amp for 12 volt operation. The active fuses are held in a mount under an access cover on the left front of the chassis. While one is clipped into the circuit, the second serves as a first line spare. Both must be of the correct amperage for there voltage being worked.
The output power is rated at 117 volts AC. A tap switch provides rated voltage at 75, 100, 125, 150 or 175 watts.
AC frequency is 60 cycles, adjustable over a range from 59 to 61 cycles.
The set has been designed to be RF Noise free over a frequency band of 200 kilocycles to 20 megacycles.
David
|