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Heating Potassium perchlorate solution
Attached is a table from The Perchlorates by Schumacher (book).
It would appear that you can heat s ... |
1-12-2020 at 16:50
by: yobbo II |
Balance repair
The pat. here definately uses current pulses to 'greatly improve'* the balance.
US US3786678 ... |
24-11-2020 at 14:17
by: yobbo II |
Crystallizing out 2 Compounds from Each other - How much Solvent to use?
Look up a graph of mutual solubility of the two compounds and if you obtain one you can study the ... |
22-11-2020 at 11:52
by: yobbo II |
Balance repair
I am beginning to think it is not feasable to build a power supply that will supply a current from ... |
22-11-2020 at 11:45
by: yobbo II |
Balance repair
Thanks for replys.
The 'dual photodiodes' (assuming thats what the sensor at the slit is) is in i ... |
19-11-2020 at 12:34
by: yobbo II |
Homemade Hydrometers
Going around on ebay I see something similar to what I had in mind in the opening post.
https://w ... |
18-11-2020 at 15:37
by: yobbo II |
Balance repair
There are no electrolytic or tantanul caps.
The display board (one of three boards in the sca ... |
18-11-2020 at 15:03
by: yobbo II |
Balance repair
I meant by load cell one with strain gauges.
There is no onboard power supply it is externa ... |
17-11-2020 at 15:31
by: yobbo II |
Balance repair
The display shows garbled stuff. Nothing sensible.
There is no load cell, it is a coil of ... |
16-11-2020 at 16:49
by: yobbo II |
Balance repair
Will try with a tiny mirror to get picture of front.
The scales in question are a p-114 Denver ... |
16-11-2020 at 10:39
by: yobbo II |
Balance repair
Got back to this:
Got back to this as I think I need it for some density measurements. The ol ... |
15-11-2020 at 13:50
by: yobbo II |
Borosilitate glass broke on heating
If you heat and cool down very slowly it may be OK. Assume it will break and take necessary preca ... |
12-11-2020 at 16:50
by: yobbo II |
Homemade Hydrometers
I have a mechanical weighing balance and I will have a go at that.
https://us.ohaus.com/en- ... |
12-11-2020 at 16:43
by: yobbo II |
Homemade Hydrometers
Thanks for replys.
I am trying to measure the density of solutions of salts. If I take a sample ... |
11-11-2020 at 17:19
by: yobbo II |
Homemade Hydrometers
Thanks for reply.
I want to go from about 1.25 to1.45 density.
Yob
|
9-11-2020 at 17:06
by: yobbo II |
Quartz tubes (140mm x 13mm) from halogen lamp -also with tungsten element running through it - ketene lamp maybe?
It is quartz glass.
The quarz is not clear, I don't know why.
Yob |
9-11-2020 at 17:04
by: yobbo II |
Homemade Hydrometers
Hi All,
I have had visions of making a quantity of density measuring 'fishing float' type hydro ... |
7-11-2020 at 11:35
by: yobbo II |
Real sassafras oil from roots!
Purchased saffarfas oil over the counter from a chemist that ordered it for me about 30 years ago. ... |
20-10-2020 at 10:31
by: yobbo II |
How dangerous really is picric acid?
If stored in the wrong container is can be dangerous. Some metal picrates can explode easily.
T ... |
19-10-2020 at 06:02
by: yobbo II |
EMP device for pesky drones
https://www.youtube.com/watch?v=rAzzmdDqT6Q |
19-10-2020 at 05:55
by: yobbo II |
More on PbO2 electrodes
Thickness of coating was probably around 5mm of a proper coat.
They used them in the Henderson pl ... |
17-10-2020 at 14:15
by: yobbo II |
EMP device for pesky drones
Youtube vid here https://www.youtube.com/watch?v=oJOSfnETiG4
looks a bit like the device in ... |
11-10-2020 at 12:13
by: yobbo II |
EMP device for pesky drones
There is a jammer here:
https://aliexpress.ru/item/4000968563014.html?spm=a2g0o.detail.100001 ... |
11-10-2020 at 11:44
by: yobbo II |
manometer
One problem you may have if you use it, especially with Hg, is that if there is no constriction at ... |
11-10-2020 at 11:08
by: yobbo II |
EMP device for pesky drones
Believe it or not! I did actually think of the 12 gauge. I believe it is illegal to shoot down a ... |
7-10-2020 at 16:13
by: yobbo II |
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