Jim -
I don't know about that on the C-Line. The 40M crystal in the 2-B is definitely more 'failure
prone' that the others, but I think that is because of the oscillator circuit Drake used. The 40M
crystal is the 'last' (highest) fundamental crystal used, the next one up is run in overtone mode.
Perhaps the 40M crystal is confused about which mode it's supposed to be in?!?! A new 6EA8 seems
to 'fix' a large number of these crystals.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Jim Shorney wrote:
On Fri, 16 Sep 2011 18:31:39 -0400, Garey Barrell wrote:
Yes, ALL crystals drift with age. Strangely enough, it's called 'aging'!! :-)
Interstingly enough, the 40 Meter crystals (at least in the C-Line era) seem to
age less gracefully than most.
73
-Jim
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