=  NOW 35 WPM  =  TEXT IS FROM DECEMBER 2022 QST  PAGE 44 =

FLUSH WITH THE BOARD, SOME ARE BENT OVER, AND OTHERS REQUIRE CLOSELY
TRIMMED LEADS.  THE LOWER BOARD CARRIES MOST OF THE RECEIVER AND
TRANSMITTER RF CIRCUITRY SEE FIGURE 11.  THE IRF510 FINAL AMPLIFER IS
MOUNTED WITH A SMALL HEATSINK, MICA INSULATOR, AND PLASTIC WASHER.
MOUNTING THE FINAL AMPLIFER AND HEATSINK REQUIRES SOME CARE.  THE IRF510
LEADS HAVE TO BE BENT CORRECTLY BEFORE SOLDERING SO THAT THE INSULATING
MATERIAL LINES UP.  THERE ARE SEVEN TOROID INDUCTORS AND A BIFILAR WOUND
TRANSFORMER, AND THESE ARE ALL SUPPLIED PREWOUND WITH TINNED LEADS.  THEY
INSTALL JUST LIKE ANY OTHER PART.  A CRYSTAL FLTER FOLLOWING THE MIXER USES
FOUR MATCHED CRYSTALS IN SERIES.  THE CRYSTALS ARE LABELED 1 4 AND ARE
INSTALLED IN THE CORRESPONDING SPOT ON THE PC BOARD.  ONE OF THE THINGS I
REALLY LIKE ABOUT THIS KIT IS THAT ALL OF THE CONNECTIONS BETWEEN THE UPPER
AND LOWER BOARDS ARE MADE USING TWO 16 PIN CONNECTORS.  ALL OF THE SWITCHES
AND CONTROLS MOUNT TO THE BOARDS, SO THERE ARE NO INTERCONNECTING WIRES AT
ALL.  THE UPPER AND LOWER BOARDS SIMPLY PLUG TOGETHER USING THE TWO
CONNECTORS AND ARE SECURED WITH MACHINE SCREWS AND SPACERS.  ADJUSTMENTS
AND FINAL ASSEMBLY AT THIS POINT, THE RADIO IS FULLY ASSEMBLED BUT NOT
PLACED IN THE CASE UNTIL YOU PERFORM SOME CHECKS AND ADJUSTMENTS.  BEFORE
APPLYING POWER TO THE BOARDS, THE INSTRUCTIONS SHOW A FEW SIMPLE OHMMETER
=  END OF 35 WSM TEXT  =  QST DE W1AW  <