Jim Lesurf wrote:

mick wrote:
On Fri, 07 Aug 2009 17:31:43 +0100, Eeyore wrote:

I'm unsure about drawing any conclusions from graphs that start at 5x
the accepted maximum audible frequency. I hope Jim has included tests
on VHF coax as speaker leads too - it makes as much sense to me... ;-)

The problem is that some amplifier designs can be upset by having a load at
RF which does not suit them.

These are simply mis-engineered designs. The methods to make them stable have
been known for more decades than I can remember.

Amy amp that does it simply needs throwing in the junk or conceivably
repairing.

Graham

due to the hugely increased level of spam please make the obvious adjustment to
my email address