[Hammarlund] Dumb tuning question

[Glen Zook]

Now you know why all the old ARRL Logbooks had a sheet
of graph paper in the back!  (The "rest" of the
story!).

73 Magazine published an article back in the early
1960s that I wrote about how to do this.  The old,
usually pre-World War II, some during the late 1940s,
receivers often had just a dial calibrated from 1 -
100 or 1 - 500 and then provided a set of "curves" to
change the relative reading to frequency.

You can expand this by adding known stations (actually
their frequencies) versus the logging scale.  Thus,
over a period of time, you can get "pretty" accurate
in your graph and thus read the actual frequency to
within a KHz or two.

Glen, K9STH


--- Delibert3A@aol.com wrote:

You need a piece of graph paper.  Along the left edge
draw a vertical axis, label it "logging scale" and
label it with numbers 0, 10, 20, etc. up to 100.

=====
Glen, K9STH

Web sites

http://home.attbi.com/~k9sth
http://home.attbi.com/~zcomco

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