[Elecraft] noise on SSB modulation

[Jim Brown]

That works with Thinkpads of the T2x and T4x vintage.  I suspect that it 
works with many others. I've been doing this for years to eliminate 
hum/buzz issues that result from leakage current from the AC power system.

See http://audiosystemsgroup.com/HamInterfacing.pdf

> If one is using a laptop, can a screw post from an unused multi-pin
> >  style connector be an effective ground connection?

73, Jim Brown K9YC