04-04-2013, 06:37 AM
Use a -61 ferrite core. That's the most important. Can be any size. FT50-61 would be the minimum size (0.500 inches) , FT82-61 is a good compromise (0.82 inches).
Since we're only tuning one freq at the high end of the band use about 40-50 turns (not terribly critical) of small wire like 28 or 30 gauge. Use a 100pf trimmer cap for tuning.
Since we're only tuning one freq at the high end of the band use about 40-50 turns (not terribly critical) of small wire like 28 or 30 gauge. Use a 100pf trimmer cap for tuning.
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