[Amps] SB-200 INPUT: L & PI

[N4KAM at aol.com]

MY SB-200 WORKS FINE ON 20 & 40 METERS.  (PI-NETWORK INPUTS)   HIGH SWR INPUT 
AND POOR OUTPUT ON 10, 15 & 80 METERS.  (L-NETWORK  INPUTS)  USING A TUNER 
BETWEEN THE EXCITER AND THE AMP, I CAN CORRECT THE  HIGH SWR AND ACHIEVE GOOD 
OUTPUT ON THESE THREE BANDS.  I DO NOT THINK I  SHOULD HAVE TO DO THIS.  ALSO, I 
DO NOT WANT TO EXPERIMENT WITH DIFFERENT  LENGTHS OF COAX BETWEEN TRANSCEIVER 
AND AMP.  OTHERS HAVE CORRECTED THIS  ISSUE BYCHANGING THE L-NETWORKS TO 
PI-NETWORKS.  I FOUND A DIFFERENT COPY  OF THE SB-200 SCHEMATIC WHICH SHOWS 
PI-NETWORKS ON 10 & 15 METERS.  I  DO NOT KNOW IF THIS WAS AN EARLY MODEL OR A LATER 
ONE OR WHY HEATH MADE THE  CHANGE.  THE CAPACITOR VALUES ARE SHOWN, BUT I 
THINK THEY MUST HAVE USED  DIFFERENT INDUCTORS.  ON THE L-NETWORK, COILS FOR 15M 
ARE PART# 40-727,  10M- #40-728.  ANY INPUT REGARDING MY INPUTS?  TNX:  KENT



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