Using the tabulation, fasten a metered variable dc supply into the wattmeter according to the following diagram. Now
JI must be pointed out again that this power meter is intended for use either with 50£i coaxial line systems with low VSWR or with 50fi dummy loads. A coaxial line that is not "flat" (unity VSWR) or a dummy antenna that does not look like" 50fi, which is the case with most HF loads used at VHF or UHF, may cause distorted power readings. If you have doubt about your transmitter^ power output when using this meter, you should check it while using a known 50fi load rated at the transmitter's output frequency, I mentioned before that this power meter was easily adaptable to higher power readings. To upgrade the meter, the only change required is to insert the correct higher voltage pilot lamp having low current, long-life specifications. Suggestions for some of these are the following Dialco Lamps:
Max Power Level (Watts) 100 200 340 800
Part No, 24CS 48CS 60PSB I20PSB
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