[Amps] AL-80B tuned input swr problem was bad 3-500Z

Charlie ad5th at direcway.com
Thu Jan 20 23:28:19 EST 2005


Took my AL-80B to Starkville,MS so Rob and Mike at Ameritron could solve e 
the high vswr on the 15 and 20M input circuits. The amp was also a tad low 
power at 650 cw.  Once the 3-500Z got replaced the input vswr tweaked down 
to spec as did the output power about 850cw.  The old tube was an Amperex 
and the new one a Taylor.   Now with 2800 on the plate under load it easily 
sails past the 1KW pep mark on my YS-60 meter on all bands.

Just sharing this ..thought it was interesting the "input" problem was the 
"output" tube.

Charlie
Ham Radio - AD5TH
www.ad5th.com
Live Blues Music
www.492acousticblues.com







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