On Fri, Dec 6, 2024 at 03:33 PM, Don VE3IDS wrote:
It was powerful enough to just parallel across the speaker lines and drive the speaker directly.?
I've just started to work on a CW sidetone technique for the HT-44.? Great idea of Walt's to use a diode and pin 8 of the octal plug to accomplish the keying.? I built a little LM555 based sidetone oscillator based on the design at AA8V's website.? I found that I could connect the output to the 500 Ohm terminal on the rear of the SX-117 and that enables you to hear the sidetone in the headphones or the speaker.? Haven't worked out any volume differences yet.
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73, Floyd - K8AC
Floyd - K8AC