Input vs. Output

[Robert & Linda McGraw K4TAX]

As someone pointed out, earlier transmitters only had plate current meters. 
For tune up purposes that was all that is needed.  As the FCC regulations 
applied, back when, only if one runs over 900 watts is the requirement to 
determine true input power to the stage feeding the antenna.  In that case 
one need a plate volt meter and a plate current meter.  The power limit at 
that time was 1000 watts input power to the last stage.

Today it is 1500 watts PEP output.  Thus regardless of transmitter or 
amplifier efficiency, everybody is playing by the same rules.

73
Bob, K4TAX

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/HEATH.html