Dennis, WB0WAO wrote: "I use a BM5 with a HC4 element and did notice that it was really difficult to make the VOX trip but for 'tests I use a foot switch anyway. My question is, should I replace R14 with one of a larger value for improved performance with the BM5/HC4 combination?" ========== Try it. You'll like it. 73, de Earl, K6SE