On Tue, 27 Aug 2013, gareth wrote:

"Percy Picacity" wrote in message
...
In article ,
"gareth" wrote:

But the fact remains that for those who understand the use of a crystal
phasing control in pre-1950
receivers that the questions as posed above are as completely informative
as
is necessary.
And you have had your answer - the tuning of the BFO has no effect on
the phasing control and vice versa. Do you not believe the answer?

Stating the bleeding obvious which we all knew any way is about as useful
and as relevant as quoting Newton's laws of motion; for neither are an
appropriate
response to the query as originally put.

I refer you page 79 of the previously mentioned book.

I don't remember a book being mentioned.

Do a search on lamb "crystal filter" and you'll find at least one
article from the thirties where he describes the filter in depth. II
doubt the famous QST article from around that time covers the filter in
the same depth.

Michael