Resistance Is Futile

Work in the shop continued on Tuesday.  I'm still working on the end plates for the 451, as well as the low-voltage control system.  The second shift had looked at it while I was away, and determined that at least one of the resistors was open.  As a result, the batteries are not being charged.

Here's what it looks like on the (only partly) accessible side:

The large wire-wound resistor on the left is indeed open.  I removed it and left it in the shop so a replacement can be ordered.  Note that it has an adjustable center tap.  The four horizontal resistors all measured OK.

Note: According to the GE data book, the vertical resistor should be 19 ohms.  Of the horizontal resistors, the second should be 25 ohms, but I measured it to be 5.  There may be other parts of the circuit that affect the reading, so it should be removed and retested.  The others all matched the specified values.

Also, for the defective resistor, one of the wire connections at the top is damaged and needs to be fixed, as you can perhaps barely see. 

I removed the wood blocks at the #2 end and painted them both sides with primer.

Meanwhile, John Sheldon and Gerry were working on the 306 some more.   Gerry welded in several rivets to hold one of the side windows.

And here's what it looks like from the outside:

Tim, of course, continues working on the 1754.  Besides making new seats in the shop, the floor is pretty much finished, and some of the seat frames are being repaired, with wood replaced as necessary.

Speaking of resistors, John is also working on repairing and repainting heaters for the 306.

Here Tim helps him with some body and fender work on the heater cover.

And outside, a contractor was installing more windows in the MPB.