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Author Topic: 3CX800A7 performance specs in W3RSW's Alpha 89  (Read 1736 times)
W3RSW
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Posts: 606




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« on: September 15, 2016, 12:21:29 PM »

As carried over from AMfone.net

Attached are Excel spreadsheets showing performance of a new pair of 2013 date code 3cx800a7's in W3RSW's Alpha 89 linear amplifier.

One spreadsheet shows outputs vs. inputs if the Pi/L net is tuned and loaded first at 1500 watts output, kept constant there, and inputs reduced.

Another spread sheet shows outputs vs. inputs if the Pi/L net is tuned and loaded for best output at each input lesser than 1500, say you only wanted to optimize output for 1000 watt max.

Most readings of RSW's data taken with two tone input generated by a Elecraft K3.  Two tone peaks were observed for maximum peak sharpness at maximum vertical deflection on a scope.
These data are not super accurate test apparatus originated but the inputs and outputs are
taken with an LP-100A Digital Vector RF Wattmeter.  The K3 can be depended to limit output without ALC, hence no ALC line is connected at any time.

Also attached for fun is a spreadsheet of what an Anan 10 can do when driving the Alpha 89 with the new 3cx800a7's. 


http://amfone.net/Amforum/index.php?topic=42047.0
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Rick, W3RSW
W3RSW
Member

Posts: 606




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« Reply #1 on: September 15, 2016, 04:02:11 PM »

Another ham caught that Anan 10 data listed as from K3, but it's input from an Anan 10 with the descriptive header cell erroneously left unchanged from earlier runs.  Regardless, the input wattage is the constant for each row.

Edit: & Revised with corrected Anan10 spreadsheet headings on referenced AMfone.net  site.
« Last Edit: September 16, 2016, 07:54:52 AM by W3RSW » Logged

Rick, W3RSW
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