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self-made high-vacuum diffusion pump
@Tacho: There is a book: "Anorganisch-chemische Experimentierkunst"; I read it a long time ago, from ... |
19-11-2008 at 15:51
by: chief |
self-made high-vacuum diffusion pump
@Tacho: No, not right: A getter-pump just enables maybe 1 experiment/day, a good electrical-driven t ... |
19-11-2008 at 09:05
by: chief |
Power-output-controlling of MW-oven, towards Birkeland-Eyde synthesis
Well, I don't mean the Birkeland-Eyde thing; I just mean the MW-regulation for other sorts of plasma ... |
19-11-2008 at 08:59
by: chief |
Neodymium (NdFeB) magnets question
The good ones will not demagnetize; but heating them may destroy the magnetismus: Some don't make it ... |
19-11-2008 at 07:42
by: chief |
Power-output-controlling of MW-oven, towards Birkeland-Eyde synthesis
First check out how easy a plasma can be generated using a domestic MW-oven (1 minute video)
http ... |
19-11-2008 at 07:01
by: chief |
self-made high-vacuum diffusion pump
I saw that bell-jar page: They just _sell_ things ..., bad for the budget ...
A good design has t ... |
19-11-2008 at 06:52
by: chief |
self-made high-vacuum diffusion pump
This is called a "getter"-pump, and was used eg. for evacuating glassware etc.: It also works well w ... |
19-11-2008 at 04:31
by: chief |
self-made high-vacuum diffusion pump
Has anyone tried to make such a pump ?
==> It needs an pre-vacuum (0.1-1 Torr, hopefully a refri ... |
18-11-2008 at 04:58
by: chief |
silver
It's a good price for silver: 80 g == 2+2/3 oz; 1 oz == 10-15 $; I would buy as much as I can get of ... |
17-11-2008 at 01:15
by: chief |
rapidshare- please stop using it
Name a few good ones, then, because rapidshare is really no fun to use ! |
17-11-2008 at 01:00
by: chief |
Thoughts On Anodes
The amount of chlorate from the 1-day run (the cup, maybe 400 g) is right for 24 h, 50 A and 50 % ef ... |
16-11-2008 at 09:56
by: chief |
Did you ever hear of Einstein's Refrigerator?
In the past times so-calle cold-mixtures were used:
==> ice + a very soluble salt (in mol/liter) ... |
15-11-2008 at 05:14
by: chief |
Which Operating System do you use?
On a debian linux installation currently there are > 18000 (!) available packages, lots of them in t ... |
14-11-2008 at 15:57
by: chief |
Alternatives to using a "pipe bomb" for a reaction?
In autoclaves usually the material is contained within an ampoule, close-sealed, possibly under high ... |
12-11-2008 at 13:38
by: chief |
Best voltage to etch metals in an electrolytic cell.
In industrial electroshaping of very hard alloys etc. they use an electrolyte which contains NaNO3, ... |
11-11-2008 at 15:19
by: chief |
test lamp needed
Calibration on only 1 line ?? Usually one would distribute several lines over all the lambda-range o ... |
11-11-2008 at 15:09
by: chief |
power-transistors as rectifiers ?
Well, the voltage supply is 30 V with center-tap, and that's what I want: 2 * 12-15 V, full wave-rec ... |
9-11-2008 at 11:30
by: chief |
power-transistors as rectifiers ?
I soldered everything and measured the voltage-difference of each diode:
==> 5 were at 204 (+/-1 ... |
9-11-2008 at 09:42
by: chief |
How do I make a sodium hydroxide solution from caustic soda?
Watch out: I gets hot, sometimes beyond boiling point, and may spit around the hot and dangerous (at ... |
8-11-2008 at 14:33
by: chief |
power-transistors as rectifiers ?
Now I have obtained 8 * MBR2545CT Schottky-Diodes, each rated at 30 A/(45V) (1.23 EUR a piece), data ... |
8-11-2008 at 12:16
by: chief |
Controlled Bacterial Nitrification (salpeter production, using nitrosomonas etc)
I now found: The N-content of _peas_ is 6.25 %; also in big amounts (25 kg) they should be very chea ... |
8-11-2008 at 06:48
by: chief |
power-transistors as rectifiers ?
I don't have 5 such Transistors, but 16 Aluminum-cooloings with 3 transistors on each, wired with 0. ... |
7-11-2008 at 12:29
by: chief |
power-transistors as rectifiers ?
Since I have burned my 2 bridge-rectifiers (33 A each), now AC passing ...
might I use power transi ... |
6-11-2008 at 07:21
by: chief |
GBL: 600 raids in Germany, Austria, Switzerland
---------------------------------------------------------------------------------------------------- ... |
5-11-2008 at 16:34
by: chief |
The death of NaOH
[quote][i]Originally posted by Formatik[/i]
You would probably have to start off using a slurry of ... |
5-11-2008 at 16:20
by: chief |
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