"Michael Black" wrote in message
xample.org...
On Sun, 13 Oct 2013, gareth wrote:
Further information most welcome, thank-you
In the 1948 Radio handbook which I mentioned previously, there are
adverts
from a company by the name of Millen, and I assumed it was the same guy
after he had left National.
Your comment about a phenolic intersperser is no doubt some means of
isolating an
earthy contact?
It would be interesting to know from the Lamb patent whether he proposed
therein the
technique of Single Signal Reception by the use of the phasing control to
null
out the audio image, or whether this was something that came about
through
experience?
ONce again, "single signal selectivity" is credited to the Lamb filter,
everyone referencs that famous QST article of his. You don't need the
phasing control to get the single signal selectivity.

Incorrect.

If the Xtal alone gave you single signal reception, then there'd be no
advantage
whatsoever in having the phasing control.

That the phasing control can be used to null out other signals is the strong
indication
that more than the one signal is getting through the Xtal.

Single Signal reception is the reference to the audio image being phased
out.