‰  NOW 40 WPM  ‰  
ABSORPTION OR TRANSITION TO CONSTANT VOLTAGE PHASE IS IN PROGRESS AND
FINALLY, RED FOR THE FLOAT TRICKLE, OR CONSTANT VOLTAGE PHASE.  THE
CHARGING ALGORITHM IS DIFFERENT FOR LIFEPO4 BATTERIES.  BUDDIPOLE SAYS
CHARGING REQUIREMENTS FOR OTHER TYPES OF BATTERIES MAY DIFFER FROM THE TWO
TYPES SUPPORTED BY THE UNIT.  I ALSO LIKED THE ORGANIC LIGHT EMITTING DIODE
OLED SCREEN.  ITS SMALL, BUT EASY TO READ EXCEPT IN DIRECT SUNLIGHT WITH
PLENTY OF CONTRAST, AND IT OFFERS A PLET

BATTERYS VOLTAGE, CURRENT, AND CHARGE STATUS SEE FIGURE 3.  IN THIS
EXAMPLE, MY POWER SUPPLY IS PROVIDING 13R8 V AND 5R34 A.  THE BATTERY IS AT
14R5 V AND IS BEING CHARGED AT 0R8 A, LEAVING 4R54 A TO POWER MY RADIO
DURING TRANSMIT.  IF I TURNED OFF THE POWER SUPPLY, THEN THE POWERPLUS
WOULD SWITCH TO THE BATTERY FOR POWERING MY RADIO.  THE BATTERY CURRENT
WOULD INCREASE TO THE ROUGHLY 4R5 A DRAWN BY MY TRANSMITTING RADIO AND THE
BATTERY VOLTAGE WOULD SAG A BIT UNDER LOAD.  THERE IS A FIVE BUTTON
NAVIGATION/ SELECTION SYSTEM FOUR DIRECTION BUTTONS AND A SELECTION BUTTON.
TO GO TO THE NEXT SCREEN, PUSH THE DOWN BUTTON, AND THE OUTPUT STATUS
SCREEN COMES UP THE STATUS OF THE A BANK OUTPUTS SHOWS THAT MY RADIO,
PLUGGED INTO THE A1 OUTPUT, IS DRAWING 0R93 A.  A GRAPH AT THE BOTTOM OF
THE DISPLAY SHOWS THE PERCENTAGE USED OF THE MAXIMUM CURRENT ALLOWED USER
SETTABLE, IN THIS CASE, USING JUST 1 A OUT OF THE 30 A MAXIMUM.
TRANSMITTING  WITH THE IC 7300 SET FOR MAXIMUM RF OUTPUT INTO A DUMMY LOAD
YIELDS A NUMERICAL AND GRAPHICAL DISPLAY OF THE 17 A DRAWN BY THE
TRANSMITTER, OUT OF THE MAXIMUM 30 A ALLOWED.  THERE IS A MAXIMUM TOTAL
CURRENT OF 40 A ALLOWABLE BETWEEN THE TWO OUTPUT GROUPS.  THUS, FOR MY
CURRENT OPERATING PARAMETERS, I HAVE SET GROUP A TO OFFER UP TO 30 A,
LIMITING THE GROUP B OUTPUT TO 10 A.  IF THE GROUP A LIMIT IS SET TO 35 A,

THEN THE GROUP B MAXIMUM CURRENT WILL BE LIMITED TO 5 A.  EACH LOAD IS
AUTOMATICALLY DISCONNECTED IF THE OUTPUT CURRENT EXCEEDS THE LIMITS.  IF
THE LOAD IS DISCONNECTED, THE GROUPS LED WILL GO OUT, AND AFTER THE FAULT
IS CLEARED, PUSHING THE APPROPRIATE GROUP BUTTON UNDER THE DISPLAY WILL
RESET THE OUTPUT AND THE LED WILL LIGHT ONCE AGAIN.  THE A AND B BUTTONS
CAN BE USED TO MANUALLY SELECT THE OUTPUT GROUPS A, B, OR BOTH.  OTHER
INDICATORS INCLUDE THE INPUT STATUS LED, WHICH GLOWS GREEN WHEN THE DC
POWER SUPPLY IS SELECTED, AND RED WHEN THE BATTERY IS BEING USED.  THE RED
LIGHT FLASHES WHEN THE BATTERY IS BEING USED AND ITS VOLTAGE FALLS CLOSE TO
THE LOW VOLTAGE THRESHOLD USER SELECTABLE.  AN AUDIBLE ALARM SOUNDS WHEN
THE BATTERY VOLTAGE FALLS TO ABOUT 0R5 V ABOVE THE PROGRAMMED THRESHOLD.
PUSHING THE DOWN ARROW BUTTON ONCE AGAIN BRINGS UP THE NEXT SCREEN THE
PROGRAMMABLE LIMITS.  THE FIRST IS THE HIGH VOLTAGE LIMIT, WHICH IS SET TO
THE MAXIMUM VALUE THAT IS RATED FOR YOUR EQUIPMENT.  THE IC 7300S MANUAL
SPECIFIES AN OPERATING RANGE OF 13R8 V PLUS OR MINUS 15, SO I SET THIS
LIMIT TO 15R5 V.  IF THE VOLTAGE EXCEEDS THE LIMIT, THE OUTPUT WILL CUT OFF
‰  END OF 40 WPM TEXT  ‰  QST DE W1AW  ƒ