Hence my decision to do the above article. Really to warn people to take
the idea that FM has distortions as low as the magazine values with some
salt. For modest signals the distortion can indeed be low enough to deliver
good results. But that isn't all the story - particularly when listening to
stations which are level compressed to max modulation.

Plan to tackle multipath and impulse interference as well in due course.
Compare the effects on FM with those on DAB and DTTV.

Alas, never did finish off Ted's tuner. This used helical resonators for
the IF and was quite a nifty design. But never made it to manufacture as
the company decided to shut up shop before it reached that point. Shame as
his ideas were quite good even if he'd fallen into a trap which I suspect
has caught many people.

Slainte,

Jim

When I get a moment!....

I'll send you an off-air CD of a really good local FM station around
here and see what you think of the quality...
--
Tony Sayer