[Chas]

Tim

Unfortunately, it doesn't include the IRC "BT" series of resistors, used heavily by Philco and other manufacturers in the 1935-42 period. They are tubular insulated types, but are coded with the body-end-dot scheme.

I found this at WRH:

BT AND BW 10% INSULATED TYPES Type BT Filament Carbon. Exceed rigid MIL -R -11 sped- Type BW Wire Wound. Will withstand 50% to 100% specifications. Withstand 50 -100% overloads for short overloads with little or no resistance change. Values periods. RETMA -coded. Sizes: BTR, 1 xß'; BTS, clearly indicated by standard RETMA color coding. 11 x .Ç; BTA, 23,6x%"; BTB, 1%x3'. Figure in Type Sizes: BW -%, 1%204"; BW -1, 1 %x %'; BW -2, 1 %x No. indicates wattage rating. 24'. Figure in Type No. indicates wattage rating.

Copy/paste of WRH OCR docs often results in strange conversions of fractions

https://www.worldradiohistory.com/hd2/ID...e-0108.pdf

The Black & White artists drawings of this type of resistor do seem to indicate code with the familiar color bands.
I got a quite a few of these from a local distributor when they closed, all banded.
Yet, I have come across early axial resistors that ARE bed code. Again, a few are in my resistor inventory.

Sadly, I had some 5# of NOS BED dog bone resistors, all were found to be some 35% high  

I gave them away marked as bad at a recent radio meet. I dare not use them as they would change value with current applied...

Now if I could just find a stash of Allen-Bradley or Ohmite

Getting more difficult to find old parts at Yard Sales and Ham radio fleas. WW-II surplus is no longer seen anywhere. Even tube radio has all but disappeared. It's been 3 years since I was able to buy a wooden 40's table radio for $10 at a flea.

Chas