On 02/02/2018 09:34, Jim Lesurf wrote:
The use of the term "most" noted. :-)

The point here is that "most" simply accepts that "some" may do so, and
they will be the instances someone will them find gives them a problem.
Thus - perhaps - asking for advice. Even "a few" when many thousands were
made can mean some will.

But - as per my first posting - the stats indicate that an antenna or
downlead degraded by water, birds, etc is more likely. Followed by some
other change in reception conditions - change in multipath, or a new TX in
the same tuned RF band, etc.

Jim


In article , Brian Gaff
wrote:
I'd not say the drift is the cause. Most receivers of the vintage noted
are pretty good. As its changed over time far more likely to be aerial
related. Brian

The irritating chattering and buzzing that affected 88.50 Mhz
disappeared after a few hours. Mystery.

The worst of the hissing must have been my loft-mounted FM 3 element
horizontal aeriel because the cap that seals the connectors is
missing. The humidity levels in the loft vary with the seasons and
weather, being ventilated and the connectors needed a good clean
with some wire wool. All ok now, though still some hiss which I
never used to get with my old AIWA 7400. I should have kept it,
it had a signal strength meter which showed an obvious reduction
when there were aeriel issues.

I've been looking at this site :-

http://aerialsandtv.com/fmanddabradio.html

And I didn't realize that I could have an external vertical
half-wave dipole that would work quite well for FM and DAB,
since Rowbridge has mixed polarity.

The reason I avoided having an external FM aeriel before was
because we have a large flock of rooks locally who patrol all
the bird tables. They are big birds and seem to like bouncing
up and down on aeriels.