"gareth" wrote in message
...
I wonder if some more experienced and senior (in the literal sense) amateur
could explain to me one difficulty that I have in understanding single
signal
reception with the crystal phasing control?
AIUI, the phasing control is adjusted so that the frequency that would
give
the audio image is phased out by being in the notch.
If that is true, how is it then possible to adjust the BFO to a
pleasant-for-you tone,
because such adjustment will alter the CIO frequency?
Surely the BFO has to be set in advance to be halfway between the serial
resonant
frequency and the notchable parallel resonant frequency?
This is a query stimulated by my current project which is to build a
boatanchor style
RX, with a flywheel-loaded slide rule dial like that of the Eddystone EA12


Thanks to all those who have attempted to reply.

As to rudeness, you might find it interesting to look at the thread as it
appears
in uk.radio.amateur, where a couple of children are trying to ensure that
their
infantile remarks do not reach a wider audience by removing the cross-posts.

Once again, thanks to all those who have attempted to reply, but I have now
found the answers by reference to my collection of old electircal
engineering texts,
specifically the 11th, 1947, edition of "Radio Handbook" published by
Editors and
Engineers Ltd of Sanata Barbara, California.

Perhaps it should have been the first place to look, a book published at the
time the technique was extant? :-)