Paul -
The 2-B started at s/n 2001, the schematic is dated 4/20/61
12087 is the latest one I've ever heard of, and had to be very near the
end of production. WB4HFN's S/N database shows S/N 12060, date coded 11/62.
The other schematics are
S/N 3001 - 9/22/61
S/N 4500 - 12/4/61
S/N 6290 - 5/31/62
It'll be interesting to see if the transition narrows down to the
changes for Version 2 at S/N 3001
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
[email protected] wrote:
OK, we're homing in on the transition point. With 12 entries
submitted, #2813 has no button and #3608 does, so that narrows the
transition point to somewhere in that "delta" of 795 units.
The "baby" of the 12 submissions is #12087; the elder statesman is
#2052 (mine).
If anyone can accurately date their unit that would be helpful
information as far as establishing a production timeline.
Regarding the change in color: Plastic comes in many forms and
some formulations are more affected by UV/sunlight than others. I
would suspect that the button is one of the cheapest forms of plastic
(and probably the dye as well), whereas the plastic used in switches
is much more robust in both coloration and overall chemical
composition (and you pay for that).
73/Arf,
Paul, K4MSG
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