Unusual functions of cheap parts
in [Design]
|
Prev: Op Amp Calculations
Next: 6v & 90v DC Power supply
From: Phil Hobbs on 29 Nov 2005 22:17 Oliver Betz wrote: > Henning Paul <henningpaul(a)gmx.de> wrote: > > >>You mean Labskaus? >>http://en.wikipedia.org/wiki/Labskaus > > > Uh, real Labskaus doesn't contain fish. And the picture is > unappetizing. You said it. "Um, do I eat this, or did I" Cheers, Phil Hobbs
From: Paul Burke on 30 Nov 2005 03:16 Henning Paul wrote: > You mean Labskaus? > http://en.wikipedia.org/wiki/Labskaus > > Here in Bremen/Germany we usually leave away the fish and use just Corned > Beef (the brazilian Corned Beef is just fine). Citizens of Liverpool are called 'Scousers' (when they aren't called worse), this derived from the local delicacy lobscouse. Corned beef stew with chips in it. Paul Burke
From: Henry Kiefer on 30 Nov 2005 09:57 Hi Jim - And on what delay timescale it works? regards - Henry "RST Engineering" <jim(a)rstengineering.com> schrieb im Newsbeitrag news:11oehva6fhp3523(a)corp.supernews.com... > And by varying the reverse bias through a current source (or moderately > large fixed resistor) you can make them into nifty phase shifters. > > Jim > > > > I wrote: NOT PIN - Diodes - as they wouldn't snap. > > > > i mean Band Switching diodes for TV-Tuners like the BA244 and the BA682. > > > > BA682 Datasheet: > > > > http://www.vishay.com/docs/85530/85530.pdf > > > > - and they snap! Try it! > > > > Jorgen > > dj0ud > > > > > >
From: RST Engineering on 30 Nov 2005 12:12 A step-recovery ("snap") diode works on the principle of stored charge in the diode. During the forward biased half of the AC waveform, the diode is a very low impedance and it stores excess charge; during the reverse biased half of the waveform, the diode remains a low impedance until the stored charge is depleted, at which time the diode "snaps" into high impedance. This snap acts much like a spark-gap transmitter, in that a tremendous number of higher order harmonics are generated. In general (and there are ways to enhance this), the power available from any harmonic is around 1/n * Pin, where n is the order of the harmonic and Pin is the RF power input to the diode. Biasing the diode simply varies the point on the reverse cycle of the AC waveform where the diode snaps. For maximum power, you try to get the diode to snap at the peak of the waveform. However, by varying the diode bias, you can get it to snap before or after the peak of the waveform. Generally you can get it to snap plus or minus about 30 degrees about the peak before the snap action degrades. 60 degrees of phase shift is nothing to talk about unless you are working with the 10th harmonic, which means a phase shift of 600 degrees. Now you've got something to work with. Jim
From: Oliver Betz on 30 Nov 2005 12:20
"G?nther Dietrich" <guenther_dietrich(a)despammed.com> wrote: >>>http://en.wikipedia.org/wiki/Labskaus >> >>Uh, real Labskaus doesn't contain fish. And the picture is >>unappetizing. > >During my time in the german military, I had some courses of instruction >on a base near Hamburg. One day they served Labskaus in the staff >canteen there. That stuff looked just like that on the wiki photo. Well, then the cook is to blame, not Labskaus per se. Go to Hamburg and visit the "Old Commercial Room". I guess they make still delicious Labskaus. Oliver -- Oliver Betz, Muenchen (oliverbetz.de) |