On Tuesday 19 July 2016 13:46:37 Lawrence D’Oliveiro wrote: > On Wednesday, July 20, 2016 at 12:07:25 AM UTC+12, Gene Heskett wrote: > > This klystron amplifier, a new one of which was north of $125,000 in > > the 1970's when I learned about them, is a long tube, around 5 feet > > long with alternating sections of copper tubeing and ceramic > > insulators separating the copper sections. Typically 4 ceramic > > sections, each of which was sealed to a section of copper equiped > > with contact rings on each end of the copper sections. A tunable box > > cavity connected the copper sections together, bridging the ceramic > > spacer, so that when the tube was "dressed" with these cavity's, and > > lowered into its focusing magnet, (2200 lbs) you could feed about 1 > > watt of signal into the top cavity... > > What is this “watt” of which you speak? How much is that in > foot-poundals per second?
A unit of electrical power, simplified to 1 volt at 1 amp = 1 watt when that currant is passed thru a 1 ohm resistor. But since the majority of radio frequency stuff is designed for a characteristic impedance of 50 ohms, then the currant is 20 milliamps while the voltage rises to 50 volts. And I am not familiar with this foot-poundals per second that you question about, but just from the wording I'd say it is a fifty dollar way to say horsepower. Which is defined in the area of exerting a force to a 440 pound weight, sufficient to lift that weight one foot in one second. Thats for an average horse. I was once in the seat of a stuck in the mud clear above the drawbar of a 1930's Case LA farm tractor. About 8500 lbs. Daddy whistled up King & Colonial, a pair of perches that between them weighted a hundred or so above the 4000 pound mark on the dial at the elevator. :) He also dug out a brace & bit to make a new double-tree out of a 7 foot length of well seasoned Iowa oak cut full native size of 2" thick by 12" wide. And despite the rationing in effect at the end of WW-II when this took place, found a lb of sugar cubes for his overall pocket. Harnessing up the perches, he hooked the traces to this new double-tree, and cleviced a 75 foot length of 1/2" chain to it. He brought them down to where the tractor could be reached from fairly dry ground, drug that chain down and hooked it to the back frame of the 4 bottom 16" plow I was pulling at the time, pulled the hitch pin after digging down to it, waded back the the perches and took a place where he could grab the bridals and made tsk tsk noises. Pulling the plow was done so it would not be in the way. Lead them back and brought the chain back & hooked it to the drawbar. Walking back to the horses he had a small handfull of sugar cubes in each hand and gave it to them. Then grasping the bridals again, a push forward with the tsk tsk. Then a whoa. They had found they were stuck and would need to put some real pull on that chain the next time, which they did, digging a trench under their bellies for about 10 feet when daddy said whoa again. The tractor had moved. So he gave me instructions to put it in reverse and to be ready to slam the clutch lever home the next time it moved. After a breather, wash, rinse and repeat and the tractor was back on dry ground. At peak pull, that 75 feet of 1/2" log chain was up in the air about 6" in the middle. Now if any of you know how to convert that mid-sag amount, the pull on the chain can be deduced, its called the intercept point method. My guess is that that 4100 lbs of horseflesh were peaking at 10,000 lbs on the far end of that chain. They of course can't do it for very long, 10 seconds perhaps, but by then I was loose and all they were dragging was the chain. The horses got the rest of that pound of sugar cubes. Those were the two most gentle giants I have ever lived around. WW-II ended just a couple months later with V-J day. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> -- https://mail.python.org/mailman/listinfo/python-list
