‰  NOW 20 WPM  ‰  TEXT IS FROM SEPTEMBER 2016 QST  PAGE 48‰

WITHIN 1 HZ, BUT THIS IS A TRICKY ADJUSTMENT ESPECIALLY AT THE HIGHER
FREQUENCIES.  ADDITIONALLY, THE SIGNAL IS NOISY AND WARBLY.  FURTHER,
INITIAL FREQUENCY DRIFT TAKES ABOUT 15 MINUTES TO STABILIZE WHEN THE CAA
500MARKII IS POWERED FROM AN EXTERNAL DC SUPPLY BUT CONTINUES AFTER THAT
PERIOD WHEN USED WITH THE INTERNAL BATTERIES.  ALSO, JUST TOUCHING THE CASE
OR DC POWER CABLE CAUSED SOME FREQUENCY CHANGE.  FOR THESE REASONS, THE CAA
500MARKII WOULD PROBABLY NOT BE THE BEST TOOL FOR PRECISE RECEIVER
MEASUREMENTS.  NEXT I CHECKED SWR ACCURACY, STARTING WITH A PRECISION 50 .
OAD.  THEN I TESTED THE CAA 500MARKII WITH SHORTED MICROWAVE ATTENUATORS OF
5  DB 1R92 1 SWR, 3 DB 3R01 1 SWR AND 2 DB 4R42 1 SWR.  I ALSO USED LOADS
MADE FROM CADDOCK THICK FILM RESISTORS A 7R5 LOAD THEORETICALLY 6R67 1 SWR,
‰  END OF 20 WPM TEXT  ‰  QST DE W1AW  ƒ