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Forums
4hv.org :: Forums :: High Voltage
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Putting many diodes in series for a HV diode.

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jpsmith123
Wed Jun 29 2011, 03:43PM
jpsmith123 Registered Member #1321 Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
 		Yes, I always have a suggestion. In this case, it's part of MG Chemicals product line...I got some from Abra Electronics:
Link2

Patrick wrote ...

I stilll havent found a good source for iso propanol... any suggestions?
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Adam Munich
Wed Jun 29 2011, 04:32PM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
 		You do know that isopropanol is rubbing alcohol right?
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Proud Mary
Wed Jun 29 2011, 04:49PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Grenadier wrote ...

You do know that isopropanol is rubbing alcohol right?

In the USA, and according to the US Pharmacopeia, "Rubbing Alcohol and all preparations under the classification of Rubbing Alcohols are manufactured in accordance with the requirements of the U.S. Treasury Department, Bureau of Alcohol, Tobacco, and Firearms, Formula 23-H (8 parts by volume of acetone, 1.5 parts by volume of methyl isobutyl ketone, and 100 parts by volume of ethyl alcohol) being used. It contains not less than 68.5 percent and not more than 71.5 percent by volume of dehydrated alcohol, the remainder consisting of water and the denaturants, with or without color additives, and perfume oils. Rubbing Alcohol contains, in each 100 mL, not less than 355 mg of sucrose octaacetate or not less than 1.40 mg of denatonium benzoate. The preparation may be colored with one or more color additives, listed by the FDA for use in drugs. A suitable stabilizer may be added. Rubbing Alcohol complies with the requirements of the Bureau of Alcohol, Tobacco, and Firearms of the U.S. Treasury Department.

NOTE—Rubbing Alcohol is packaged, labeled, and sold in accordance with the regulations issued by the U.S. Treasury Department, Bureau of Alcohol, Tobacco, and Firearms."

Source, US Pharmacopeia, here: Link2
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Adam Munich
Wed Jun 29 2011, 05:01PM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
 		Still okay for cleaning diodes. I'm not sure why you are overcomplicating things so much partick...
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Patrick
Wed Jun 29 2011, 06:40PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
 		I did not realize that Isopropanol = Isopropyl alcohol, did not know that.
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Proud Mary
Wed Jun 29 2011, 06:50PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Grenadier wrote ...

Still okay for cleaning diodes. I'm not sure why you are overcomplicating things so much partick...

Nothing causes such complication as the propagation of error!

IPA is recommended for general electrical cleaning, whilst US Rubbing Alcohol contains acetone and is not.
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Forty
Wed Jun 29 2011, 06:51PM
Forty Registered Member #3888 Joined: Sun May 15 2011, 09:50PM
Location: Erie, PA
Posts: 649
 		hmm. I'm not sure where they sell proud mary's "Rubbing Alcohol" with all that junk in it, that sounds more like denatured alcohol. i just got some 91% isopropyl from the grocery store for about 85 cents. it's found next to the bandages and h202. put it in a little spray bottle. pretty handy stuff.
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Proud Mary
Wed Jun 29 2011, 07:32PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Forty wrote ...

hmm. I'm not sure where they sell proud mary's "Rubbing Alcohol" with all that junk in it, that sounds more like denatured alcohol.

If you search under Pennsylvania Wholesale Chemicals you'll find a good number of suppliers of Rubbing Alcohol not far from your home.

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Forty
Wed Jun 29 2011, 08:04PM
Forty Registered Member #3888 Joined: Sun May 15 2011, 09:50PM
Location: Erie, PA
Posts: 649
 		edit: unless you get your rubbing alcohol from a chemical supplier, then it should be fine to use. look for the 90% or higher isopropyl stuff.

how's the diode string going?
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Proud Mary
Wed Jun 29 2011, 08:16PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Forty wrote ...

wouldn't it be safer to use the isopropyl stuff on electronics because it doesn't have the acetone in it?

You seem not to have noticed that I have made this point above.

As for 'going off topic,' nothing can be so off topic as glaring errors left uncorrected.
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