On Feb 12, 5:16*am, dave wrote:
bpnjensen wrote:

None that I've noticed. *These are specifically sold for Amateur Radio.
* *From what I've heard the Astrons and the MFJs are both electrically quiet.

Thanks - interesting. *I'll look into those too.

Pyramids are not especially popular with the Amateur Radio crowd:

http://www.eham.net/reviews/products/20

So I have noticed! But the Astrons, in general, have a loyal
following.