Note: Resurrecting a LONG dead message string here with a bit of newly discovered information.
In the previous message string from 2005, I mentioned that Steve Palmano and I had formed what we thought was a good progression of dates at which GE changed its control stands. I've just been lucky enough to obtain a rather unusual GE operating manual that nails down one of the dates more exactly.
The manual is a copy of GEJ-3844, which normally is the operating manual for just the U30 series locomotives at the time that they were being offered concurrent with the U28 and prior to introduction of the U33. However, this manual has an addendum (which in GE operating manuals are pink pages) in the back; this section is GEJ-3857, "Operating Instructions Supplement - Model U33 Locomotive" and is dated 11/67 with a print run of 1000 copies.
The only content of this addendum is depiction of, and description of, the two-lever control stand as discussed in this string by LCJ. We can safely assume then that this stand appeared for production U33 locomotives; I briefly looked at some of the SCL U33B photos on Fallen Flags, and these very early units appear to have the two lever stand. The very early D&H U23B units also appear to have this stand. We might then fairly safely assume that the two-lever stand became the GE standard at this time -- 11/67 -- unless some railroad special-ordered the previous KC-99 controller and stand.
The dates of conversion from sixteen notch to eight notch setup on the two lever control stand remains fixed at 4/69 to 9/69 as assumed before. The inclusion of EMD master controllers in the two-lever stand was noted by LCJ as a GE factory option. The change to the AAR control stand and KC-108 controller remains assumed as before.
Finally, for those real rivet counters out there -- it is of interest that the U33 supplement for the U30 manual (thus effectively converting the manual to cover both models) has a GE manual number HIGHER than that used for the manual that covers U23-U30-U33, which is GEJ-3856. It would seem as if GE developed the new manual and this supplement at the same time, and got by with 1000 copies of the supplement tacked into U30 manuals (for U33 locomotives) until the first GEJ-3856 manuals were ready.
I've detailed the U25 control stands on our blog, but have not progressed beyond that point. Click here to see U25 stands from prototypes through final U25 production:
http://railroadlocomotives.blogspot.com ... tands.html
-Will Davis