Unusual functions of cheap parts
 

"John Larkin" wrote in message
...
Tell me about it. I tried some pins to see if they would snap, and
they turn out to have incredibly mushy reverse recovery, Slop Recovery
Diodes.

I've always been led to believe that this wasn't a bug, but a feature.
Really! (E.g., you can often get away with one diode when you'd otherwise
need two if the things actually recovered quickly...)

Unusual functions of cheap parts
 

Oliver Betz wrote:
Henning Paul 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

Unusual functions of cheap parts
 

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

Unusual functions of cheap parts
 

Hi Jim -

And on what delay timescale it works?

regards -
Henry


"RST Engineering" schrieb im Newsbeitrag
...
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

Unusual functions of cheap parts
 

"G|nther Dietrich" bravely wrote to "All" (29 Nov 05 23:19:34)
--- on the heady topic of " Unusual functions of cheap parts"

GD From: "G|nther Dietrich"
GD Xref: core-easynews de.sci.electronics:308835
GD rec.radio.amateur.homebrew:89433 sci.electronics.components:102901
GD sci.electronics.design:527075


GD Oliver Betz wrote:

You mean Labskaus?
http://en.wikipedia.org/wiki/Labskaus

Uh, real Labskaus doesn't contain fish. And the picture is
unappetizing.

GD During my time in the german military, I had some courses of
GD instruction on a base near Hamburg. One day they served Labskaus in
GD the staff canteen there. That stuff looked just like that on the wiki
GD photo. This was the event when I learned why they had roller blinds
GD made of solid steel between kitchen and refectory.
GD One of the comrades said: 'I won't eat this. That's food for pigs!'
GD And he threw his dish into the kitchen. Most others followed.
GD The officer of the guard, whom the cooks called after closing the
GD roller blinds, had to draw his gun and shoot in the ceiling to calm
GD the riot down.
GD Since I had been near the end of the queue, I had no opportunity to
GD try this Labskaus. I still don't know what it does taste of.


The Roman legionaires a long time ago learned that an army marches on
its stomach. Since Roman soldiers would march 30 kilometers per day
they had to keep fit and good nutrition was a primorial concern for
the generals. It isn't suprising then that soldiers are ready to riot
and mutiny over their grub with such a longstanding tradition.

A*s*i*m*o*v

.... Combat the greenhouse effect - eat a cow.

Unusual functions of cheap parts
 

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

Unusual functions of cheap parts
 

"Günther Dietrich" 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)

Unusual functions of cheap parts
 

On Tue, 29 Nov 2005 18:00:50 +0100, Henning Paul wrote:

Spehro Pefhany schrieb:

I think I remember something like that, maybe with ground beef.

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). And sometimes, you find
diced pickles in it. Tastes even better, then.

Looks a lot like ordinary corned beef hash to me, if a little less
coarsely chopped.

But I wonder why they serve it with one of these?

http://www2.catalognavigator.com/lib...op?plpver=1001

;-)
Rich

Unusual functions of cheap parts
 

On Wed, 30 Nov 2005 18:23:05 GMT, the renowned Rich Grise
wrote:

On Tue, 29 Nov 2005 18:00:50 +0100, Henning Paul wrote:

Spehro Pefhany schrieb:

I think I remember something like that, maybe with ground beef.

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). And sometimes, you find
diced pickles in it. Tastes even better, then.

Looks a lot like ordinary corned beef hash to me, if a little less
coarsely chopped.

But I wonder why they serve it with one of these?

http://www2.catalognavigator.com/lib...op?plpver=1001

;-)
Rich

You could also serve with one of these:

http://upload.wikimedia.org/wikipedi...zimmer1886.jpg



Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

Unusual functions of cheap parts
 

Hello Jorgen,

Jorgen Lund-Nielsen wrote:



Winfried Salomon wrote:

Hello Jorgen,

Jorgen Lund-Nielsen wrote:

[.....]

2N2369 for fast pulses.



btw, do you know a standard complementary pnp-transistor for the
2N2369, such like 2N3905 but with higher ft and less feedback
capacitance? It seems that the manufactorers have almost no data on
their internet pages.

mfg. Winfried


Maybe 2N4261 ? Have not looked into the datasheet, but as i remember,
i have seen them sometimes in complementary with the 2N2369


the problem is, that it is an rf-transistor and can't be driven at
30V/0.2A, I found a complementary in an old table KTT, the 2N2894A, but
it also has max. 12V, so I find no other than the 2N3906.

If I simulate with the 2N3906, the frequency response is not worse than
with the 2N2894A.

mfg. Winfried