‰  NOW 30 WPM  ‰  TEXT IS FROM SEPTEMBER 2017 QST  PAGE 49‰

JUMPER AT THE TOP RIGHT LABELED TRI/SIN.  THE PRINTING ON THE CASE COVER IS
SLIGHTLY BLURRED BUT GOOD ENOUGH TO BE EASILY READ.  HOW WELL IT WORKS
AFTER ASSEMBLY, I APPLIED POWER AND DID THE SOLID STATE EQUIVALENT OF A
SMOKE TEST I PUT MY FINGER ON THE SINGLE IC, AND IT WAS NOT HOT.  SO FAR,
SO GOOD.  THEN I TOOK A LOOK AT OUTPUT WAVEFORM ON MY OSCILLOSCOPE OR TRIED
TO.  NO MATTER WHAT I DID, I COULD NOT GET MY OSCILLOSCOPE TO TRIGGER AND
SHOW A STABLE WAVEFORM.  WELL, MAYBE IT WAS TIME TO READ THE INSTRUCTIONS.
ONE OF THE INSTRUCTIONS SAID THAT APPLYING MORE THAN 12 V MAY MAKE THE
CIRCUIT UNSTABLE.  OOPS.  I AM USING A 12 V AUTO STORAGE BATTERY TO SUPPLY
12 V DC TO MY SHACK AND WORK BENCH.  OUT CAME THE VOLTMETER, AND I SAW MY
TRICKLE CHARGER WAS KEEPING THE STORAGE BATTERY AT SLIGHTLY MORE THAN 13R6
V.  I DISCONNECTED THE KIT FROM THE STORAGE BATTERY, CONNECTED IT TO A 12 V
POWER SUPPLY, AND SUDDENLY THE WAVEFORMS WERE STABLE.  MAYBE I SHOULD HAVE
READ ALL OF THE INSTRUCTIONS.  TABLE 2 SHOWS THE MANUFACTURERS
SPECIFICATIONS.  WHILE READING THEM, YOU HAVE TO NOTE CAREFULLY WHERE THE
GOOD REGIONS APPLY.  THEY ARE NOT UNIFORM ACROSS ALL CONDITIONS.  THE
‰  END OF 30 WPM TEXT  ‰  QST DE W1AW  ƒ