Add in 350 Hz to that and you have a dial tone. (Really!)
73, Mike ab3ap On 02/28/2015 04:14 PM, Joe Subich, W4TV wrote:
440 Hz is A above middle-C. Middle C is 261.6 Hz. 73, ... Joe, W4TV On 2015-02-28 4:05 PM, Don Hall wrote:Years ago I went to 440 (I believe this is middle C) and at 82, still using it. Works for me. 73 Don K5AQ
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