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Author Topic: Legal Limit in Canada, 1000 watts DC Input  (Read 1185 times)
VE7ALQ
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Posts: 349




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« on: February 09, 2005, 09:25:40 AM »

I remember a query from an American amateur as to how to measure a kilowatt DC input?  According to our Canadian regulations, this is measured as 1000 watts DC input to the anode(s) of the final amplifier tube(s).  We used to have a requirement for two meters, one for V(p) one for I(p).  Checking for a kilowatt DC input was trivial,you just read the V(p) meter and multiplied it by the I(p) meter.  This is the case for CW and RTTY and other such modes which do not have a modulated envelope.  Where things become murky is when trying to measure the peak power input on SSB.  We have a higher, 2 kilowatt, limit on peak power when using SSB.  I am not too concerned about the SSB limit because

(1) I only run Morse Code (CW) on HF
(2) My Amp. is only capable of 1200 watts peak on SSB

Hope I have answered your question.
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