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Picture: JM CHERRY
GENERAL DESCRIPTION
The R.L. Drake Model DC-24 Power Supply is a self-contained power converter which transforms 24VDC to the voltage necessary to operate our TR-4, T-4XB, or T-4B. A receptacle supplying 115 VAC permits operation of the R-4B/T-4XB or T-4B combination.
SPECIFICATIONS
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INPUT: 24 VDC |
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OUTPUT: 650 VDC 250 VDC at 300 ma average (500 ma peak) at 175 ma -45 to -65 VDC adjustable bias into 33K ohms 115 VAC at 600 ma for receiver operation * (115 VAC at 1.3 A if used alone) 12.5 VAC at 6A |
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FREQUENCY: Approximately 330 Hertz square wave |
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SIZE: 10 L x 4- l/4" W x 3-l/2" H |
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WEIGHT: 8 pounds |
* An On-Off switch to short Pins 1 and 2 of the S-312-CCE female connector should be used to provide 115 VAC output for applications other than an R-4B Receiver. A ‘Tube Saver’ such as GC Electronics No. 25-398 may be required for loads other than an R-4B. This is due to the extremely low cold resistance of some loads such as incandescent lamps, some TV sets, etc.
INSTALLATION
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The DC-24 is supplied for use with negative ground system. |
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DO NOT USE WITH POSITIVE GROUND SYSTEMS OR SERIOUS DAMAGE MAY RESULT |
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We recommend that the DC-24 be mounted where it is protected from water and engine hear. Attach the short black wire of the cable assembly to the nearest convenient ground and run the red/white wire to the ungrounded terminal of the battery, or to the ‘hot’ terminal of the starter solenoid. Mount the fuse holder in a convenient location as near the battery as possible. Cut the black and red/white wires as short as possible to avoid unnecessary voltage drop. |
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Connect the DC-24 Power Supply to the transmitter using the cable assembly supplied. Coil up any excess cable and tape it in a convenient location. Adjust the BIAS ADJ control, located on the end of the unit, as described in the transmitter instructions under Tuning Procedure. |
USE IN AIRCRAFT
Amateur radio equipment when used in aircraft does not require FAA Type Approval because It is not the primary: means of a aircraft communication. However, airborne amateur equipment must be installed by a certified mechanic or the installation approved by FAA Local Inspection. We suggest you contact local FAA General Aviation District Office before any installation is attempted.
