[Elecraft] CM500 headset on K3S and KX3?

[Josh Fiden]

The talk box predates the Heil version that Frampton used. 

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> On May 6, 2020, at 11:51 AM, john at kk9a.com wrote:
> 
> Interesting that Heil is not represented commercially. I believe that Bob Heil invented the talk box that Peter Frampton made famous. I use a Sony MDR-7506 for RTTY and CW but I do use a Heil ProSet IC for SSB.
>