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Using a BLF278 or similar dual FET or even 2 seperate FETs and 25 Ohm 9:1 and 4:1 TLT with 50 Ohm Semi rigid Guanella Baluns. This is actually 6 m and 4 m, BLF188 is the BLF278 replacement. The input could equally use a ferrite 9:1 transformer and do away with the balun/TLT arrangement. For higher powers the output TLT would need be changed to a 1:9 (and perhaps an L match with it to get the correct drain to drain load)

Submitted by: GI0GDP


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