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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
Compact Flow-Through Electrochemical Cell for Perchlorates


It may erode as the current carrier. It will be exposed to the solution and some current will go ...
6-10-2020 at 12:08
by: yobbo II
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