‰  NOW 20 WPM  ‰  TEXT IS FROM JANUARY 2016 QST  PAGE 56‰

READING WATTMETER TO BE QUITE ACCURATE FOR AN ANALOG METER.  EACH TICK ON
THE METER IS 100 W, AND ALL ALS 1306 METER READINGS WERE WITHIN 1 TICK OF
THE POWERMASTER READINGS.  NEXT I LOOKED AT SWR PROTECTION.  THE ALS 1306
IS DESIGNED TO PROTECT ITSELF WHEN IT SENSES APPROXIMATELY 150 W REFLECTED
POWER.  TO TEST THIS, I BUILT A SWR DEGRADATION BOX CONSISTING OF A HIGH
CURRENT 220 PF CAPACITOR PLACED IN SERIES WITH MY HIGH POWER DUMMY LOAD.
THIS PERMITTED ME TO VARY SWR BY SIMPLY CHANGING BANDS.  I APPLIED THE FULL
DRIVE REQUIRED FOR 1200 W PEP AS LISTED IN TABLE 2 TO THE SWR DEGRADATION
BOX/DUMMY LOAD.  FOR ANY SWR OF 2 1 OR GREATER, THE AMPLIFIER IMMEDIATELY
FAULTED WITH NO DAMAGE.  THEN, STARTING WITH VERY LOW DRIVE, I INCREASED
THE DRIVE LEVEL UNTIL THE AMPLIFIER FAULTED.  TABLE 3 LISTS THE ACTUAL
‰  END OF 20 WPM TEXT  ‰  QST DE W1AW  ƒ