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These would be some pretty impressive diodes, admittedly. I haven't penciled out any of the math w.r.t. rise time and loading, or checked for low-C power schottkys.
The poor-man's version doesn't need them, which has the dual attractions of being quick and dirty, twice over.
Chips and wire bonding kit shows up on the 'bay...
James
interesting
ideas
current
Agoston. You
I was hoping for schematics as well as pictures. Oh Well.
?-)
current
Tek never released schematics of the 11801 series scopes. The service manual stops at the board level.
If you're actually interested, check out Agoston's patents, which do have schematics of sorts.
-- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
h
he
d
ing > >> >isn't actually BS, but you are what the Dutch call a vaakidiot, w ho knows > >> >everything about his own area, and very little about anythin g else."Vaak" > >> >translates as trade or profession - expertise comes clo se, but doesn't
nd they are seen by just the editor, the author(s) and - sometimes - the ot her referees.
Peer reviewing doesn't always work. I've published a number of "comments" i n Rev. Sci. Instruments which essentially point out that their peer-review process intermittently fails to find electronically competent referees. Eve n John Larkin has noticed that physicists (with the possible exception of Hobbs and Herold) don't take electronics seriously enough.
Sloman A.W. "Comment on 'Noise averaging and measurement resolution" Review of Scientific Instruments, 70 4734 (1999)
got a rather indignant response from the original author who felt that it w as asking a bit much of an interferometer physicist to know about publicati ons on "dithering" in the audio literature. The classic paper in the area t alks about "The Who's" first digitally-mastered recording ...
R. M. Gray and T. G. Stockham, "Dithered quantizers" IEEE Trans. Inf. Theor y IT-39, 805 (1993).
-- Bill Sloman, Sydney
Jeez, they must have sen you coming. I'd expect a couple or three hundred bucks for custom winding.
--
"For a successful technology, reality must take precedence
over public relations, for nature cannot be fooled."
(Richard Feynman)
Sounds like the 'Ass tax' is still quite high in Europe.
d
I didn't manage to get the inductors and the transformers wound at the same time, and there were - in fact - two different inductors. In each case I p aid about 200 euro - roughly $260 (US) - which was judged reasonable by a D utch acquaintance who gets small-volume wound parts made from time to time.
ACE-Wikeltechniek were handy and prepared to take on the jobs, and got both done within a day, so I was happy enough with their prices. I had hand-wou nd one transformer, and didn't like the quality I'd got. If I could have go t at a small coil winding machine with a turns counter, of the sort I've us ed at various places I've worked, I'd have done it myself, and I'll probabl y buy one of the cheap Chinese versions of that hardware if I ever have to do it again.
-- Bill Sloman, Sydney
red
It came out as roughly $260 US for each of two separate orders.
It was apparently a reasonable price for a couple of experimental two-offs. I was less specific about the price in my original post - I had to log int o my Dutch bank-account to find out how much I actually spent, and Frank Ab se seems to have misjudged how much a "significant portion" might be.
As usual, you have let your imagination run away with you.
-- Bill Sloman, Sydney
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