Paul -
Hmmmmm... The FIRST 2-A schematic is 1001, and the 2-A did NOT have
the button on the dial. The first 2-B schematic I've been able to find
is 3001, dated 9/22/61, with very minor circuit changes, including the
change from 6BN8 to 8BN8. However, the lowest 2-B s/n unit I have seen
is 2008, with date codes in April 1961.
Perhaps just some 'left-over' 2-A dial glasses!
All are on your CD, which is on the way!
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
ph...@aol.com wrote:
Here's an interesting find - well, to me, anyway: #2052 does not
have a little red button on the main dial so that it can be slid back
& forth for calibration. In fact, the manual says:
"The dial scale is marked in 10 KC divisions and is adjustable for
calibration purposes by sliding left or right with a slight pressure
on the front of the glass."
IIRC, other versions I've owned that were no doubt manufactured
later had a red button mounted on the front of the glass. Here's a
photo from Wikipedia that shows it:
http://upload.wikimedia.org/wikipedia/commons/b/b5/Drake2b.png
So, I wonder when it was added? I don't remember if my original
1963-purchased version had the button or not.
I love counting rivets........ :-)
73/Arf,
Paul, K4MSG
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