- 1 -Welcome: Thank you for your purchase of the DWM-4 Digital Wattmeter. The DWM-4 representsan advancement in technology that has never before been
- 10 -menu offers information about each of the four sensor inputs. Some items are common acrossdifferent menus.There are two basic wattmeter modes: s
- 11 -At a minimum, a 100 W HF radio and good 50ohm dummy load can be used to calibrate the HFsensor and display unit. Even if you know how much power
- 12 -was installed correctly. Make sure U3 is installed correctly. Check D1 for polarity. Check the SIPresistor (RP1) for proper orientation.No Displ
- 2 -in the assembly instructions to assist the builder. These can be used for parts identification and PCboard placement.Assembly: You will first ins
- 3 -___ Install the socket for U1. Note the orientation of the socket. The flattened corner goes in the upperleft, toward the 14-pin DIP socket for U
- 4 -___ Install the LCD Module in the chassis. Use the 4 black flat head screws, the two #4 nylon washersand four nuts. Use the washers on the Stat
- 5 -You are now ready to mount the DWM PC board in the chassis.___ Install the DWM-4 PC board in the chassis using four screws, nylon spacers, washer
- 6 -___ Install the .01uf monolithic capacitors, C1 and C2.___ Install 1/8" stereo jack.___ Unwrap the enclosure. Install the SO-239 connectors
- 7 -HF/QRP Remote Sensor Assembly Instructions___ Wind T1 with 10 turns using the red and green #28 gauge wire. T1 is the small, black toroid justun
- 8 -___ Install C4, 3.5-13 pf trimmer capacitor. Note that C4 has two pins that are common (connected).They should line up with the two holes in the
- 9 -Installation: The DWM-4 operates from an 11 to 15 volt DC power source. The current requirementis about 75 mA. Be sure to use a power supply or
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