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Welch duoseal 1397

Hello,

Pictured is the 'end plate' of the 1397 vacuum pump and also the body showing the vanes ...		 21-11-2022 at 18:38
by: yobbo II
Is induction heating still effective with molten copper ?

Also if you were using a metal container of some sort (iron/steel) to hold the copper, would the i ...		 21-11-2022 at 18:19
by: yobbo II
Unfamiliar Microscope

Is there two objectives on the bottom of the scope (turn it up).

Yob 		16-11-2022 at 17:34
by: yobbo II
Welch duoseal 1397
Thanks for the help.

I had to laugh. I emailed a company that was selling/supplying parts for Wel ...		 11-11-2022 at 17:28
by: yobbo II
Welch duoseal 1397
THanks for reply.
I found another exploded diagram that shows the valve.

What is its function?
...		 10-11-2022 at 04:38
by: yobbo II
Welch duoseal 1397
Hello,
I have a dismantled a Welch duoseal 1397 vacuum pump. There is a bellows controlled valve in ...		 9-11-2022 at 18:05
by: yobbo II
Using a(n Ag) mirror RBF to carry out reaction with fused alcali

You can plate tantalum onto reaction vessells but that is not your original question.

Something ...		 29-10-2022 at 14:25
by: yobbo II
3 350/420 volt phase generator for 230 Volts single phase


Thanks,

I cannot check anything as I don't own the generator yet and it is online.

I had n ...		 29-10-2022 at 14:21
by: yobbo II
3 350/420 volt phase generator for 230 Volts single phase
Thanks for replys,

The voltage threw me out too.

I think maybe the 380/420 (I misread the plat ...		 27-10-2022 at 14:37
by: yobbo II
3 350/420 volt phase generator for 230 Volts single phase
Hello,

Can anyone give me their opinion on the generator in the picture (name plate).
Can I ob ...		 27-10-2022 at 02:49
by: yobbo II
Replicating Commercial EBW Gold Connection using LED

I think you only really need gold of you want corrosion resistance. Copper will do.
It could be t ...		 21-10-2022 at 17:35
by: yobbo II
Balance repair

at Sulaiman

Reading from your attached file:

For class E1 weights, the density of air should ...		 12-10-2022 at 15:56
by: yobbo II
Balance repair


Thanks for replys.

I have looked around the electronics but they are way beyond me.
I can pu ...		 12-10-2022 at 15:44
by: yobbo II
Balance repair

Thanks for the diagrams Unionised. The thanks is a bit belated!

I attached the following circui ...		 11-10-2022 at 13:22
by: yobbo II
Chemicals used to corrode locks & gain entry ?

If one were to immerce the lock in a pickel of salty water and run electricity having the lock as ...		 11-10-2022 at 12:47
by: yobbo II
Ferrates vs. perxenates
http://www.sciencemadness.org/talk/viewthread.php?tid=17233#pid218382

and

http://www.sciencem ...		 11-10-2022 at 12:41
by: yobbo II
Homebuilt 1300°C tube furnace
Hi
Lidl. Are selling zirconia blade chef knives for a few bucks.
They might be usable as very high ...		 11-9-2022 at 10:54
by: yobbo II
Using screen as input/output interface
Purchased input/output devices are always easier, more tidy etc.

If you needed a hugh amout of in ...		 1-9-2022 at 13:30
by: yobbo II
Using screen as input/output interface
When connecting stuff to a computer it can be a bit of a pain getting interface circuitry to go from ...		 24-8-2022 at 15:30
by: yobbo II
Home made vacuum controller
Hello,

I obtained the following (thanks to Mush).
It shows a simple vacuum controller that will ...		 22-8-2022 at 05:42
by: yobbo II
DIY Cheap "Proprietary" Thermal Probe?

I have Pt 100 probes only.

Some reading here

https://uk.rs-online.com/web/p/rtd-sensors/1235 ...		 22-8-2022 at 05:31
by: yobbo II
DIY Cheap "Proprietary" Thermal Probe?

There are also four wire configurations. Same idea as the three wire but an extra wire both sides. ...		 20-8-2022 at 13:07
by: yobbo II
What yields when preparing Nitric Acid from Salts?

I have read on the forum that ammonium nitrate gives 'lower quality' nitric acid. Would this mean ...		 20-8-2022 at 13:03
by: yobbo II
What reagents would you bring during an apocalyptic scenario?

A large tank of hydrocarbon fuel

To stay warm

Yob 		20-8-2022 at 05:25
by: yobbo II
Can we convert non food grade reagents into food grade using crystallization only
God be with the good old days when petrol contained lead

https://www.chemistryworld.com/news/hist ...		 22-7-2022 at 03:24
by: yobbo II
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