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| Reviews Summary for Alpha 4520 Digital HF Wattmeter |
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Reviews: 2
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Average rating: 5.0/5
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MSRP: $$1195
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Description: The Alpha Wattmeter represents a revolution in RF power measurement. State of the art integrated circuit technology and innovative design techniques have combined to deliver a mix of features, precision and convenience previously found only in a laboratory-grade power meter. Each meter is individually calibrated over a wide temperature range and the complete HF spectrum. During operation, the 4520 simultaneously measures the frequency of the signal and the internal temperature of the unit and compensates for those factors in determining measured power. This assures linearity in the accuracy of measured power under changing operating conditions. Internal calibration errors are also further reduced by use of proprietary sampling and differencing techniques.
The built-in analog meter displays forward or reverse power using nine full-scale ranges from 1W to 5kW. The digital display continuously displays either Forward or Delivered power. All data is available for computer logging through the serial data interface.
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More info: http://www.alpharadioproducts.com/4520.asp
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N1JMS
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Rating: 5/5
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Mar 3, 2009 19:03
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In a Class of its Own
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Time owned: 6 to 12 months
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Simple, Solid and Accurate. Not cheap, but a worthwhile investment, the last watt meter that you'll ever need to purchase!
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N6PSE
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Rating: 5/5
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Jun 5, 2007 17:35
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A quality product!
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Time owned: 0 to 3 months
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I have owned my Alpha 4520 Wattmeter since I purchased it new at Dayton 2007. Alpha claims this is a laboratory-grade power meter and it certainly seems to be the case. This unit is extremely accurate and stable. In fact, what impressed me so much was at Dayton this unit ran continuously for three days at full legal limit without a glitch. I was so impressed, I bought the display unit and received a show discount from Alpha. During operation, the 4520 simultaneously measures the frequency of the signal and the internal temperature of the unit and compensates for those factors in determining measured power. Other wattmeters don't do that.
The built-in analog meter displays forward or reverse power using nine full-scale ranges from 1W to an amazing 5kW! (no Hams will need that) The digital display continuously displays either Forward or Delivered power. It is almost as if it is two wattmeters in one. All data is available for computer logging through the serial data interface using a straight through serial cable. Alpha provides Windows software.
This unit is solid and is built like a tank. It is impressive and yes it is expensive but the quality appears high and I believe that it is built to last. So far, I am very impressed.
Paul N6PSE
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