Re: inductive resistors.
Raj's resistors are the 'norm' and have been for a long time. Carbon-rod resistors (non-inductive) went out of fashion in the 1940s, but they were the standard until then. Their manufacture was by baking the rod (with its leads), so it was very imprecise. Their value color-coding (the original) was body-end-dot so there was no tolerance value - it was generally assumed to be 20%. Power rating was by physical size, (as it still is) so the smallest common size ended up about 3/4"long by 3/16" diameter.The biggest ones in my 'junk box' are 2 1/2" by 1.2". As commercial use of higher frequencies progressed, the physical size and tag-strip construction became a limiting factor, so axial leads were developed with color bands, tolerance band, extra decimal value ...
Non-inductive resistors are made these days by grooving from each end in counter-sense (like a turnbuckle's threads), but they're rare and expensive. I have seen a lengthwise cross-section of a high-power RF dummy-load, and its manufacture was a mystery to me - intriguing, but I hadn't the time to study it.
Just FYI ...
73 de ZL2DEX
