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  • Category: Electrical
  • Founded: Dec 6, 2001
  • Language: English
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1417 Homebrew_PCBs@yahoogr... Send Email Apr 1, 2003
8:37 am
Monthly Reminder, please read: Subject lines: Remember to change the subject line if you are straying from the original thread. Please change the subject line...
1418 grantfair2001 Offline Send Email Apr 3, 2003
5:18 am
Thanks for the additional info, Adam. What kind of methyl orange are you using - aqueous? What percent, 0.1% or....? (MO seems to be more readily available...
1419 Adam Seychell
adam_seychell Offline Send Email
Apr 3, 2003
7:55 am
... don't know about shelf life, its from my chemistry set that I got when I was a kid (~ 20 years ago) and its works fine. The indicator solution I use is...
1420 bhaskaran chidambaram
bhaskaran_india Offline Send Email
Apr 3, 2003
9:14 pm
i want info about oscillators and their functioning.if anyone has the material pls send it tnx Catch all the cricket action. Download Yahoo! Score tracker ...
1421 Steve Greenfield
alienrelics Offline Send Email
Apr 4, 2003
5:37 pm
This would be on topic for lists such as Electronics_101 and Advanced_Electronics. http://groups.yahoo.com/group/Electronics_101 ...
1422 luis_emilio2 Offline Send Email Apr 5, 2003
4:13 am
hi i looking for one software, schematic and pcb layout to rum on old windows 3.1 help please best regards muale...
1423 Derek B.
hightechsyst... Offline Send Email
Apr 5, 2003
5:52 am
Hi, Any Dos software will work with Win 3.1 as it is running on top of Dos. Pclogic use to have a Dos program ver 1.1 that was pretty good. You can still find...
1424 grantfair2001 Offline Send Email Apr 5, 2003
7:25 am
I bought a plastic Coleman cooler to hold my cupric chloride etchant. The manufacturer says this is made of polyethylene. Is this likely to stand up well, or...
1425 Ned Konz
nedkonz Offline Send Email
Apr 5, 2003
3:17 pm
... Polyethylene is a good choice for caustic and acidic liquids. -- Ned Konz http://bike-nomad.com GPG key ID: BEEA7EFE...
1426 luis emilio
luis_emilio2 Offline Send Email
Apr 5, 2003
7:58 pm
hi thank you for you repply where i can find pclogic 1.1 ? regards muale "Derek B." <hightechsystems@...> wrote:Hi, Any Dos software will work with Win...
1427 adam Seychell
adam_seychell Offline Send Email
Apr 6, 2003
11:36 am
Yes. Polypropylene, and polyethylene are the two most common plastics for containers and packaging and are have very good chemical resistance. I've been...
1428 rolanyang Offline Send Email Apr 6, 2003
3:34 pm
Try EasyTrax from Protel. It run in DOS, but should be mighty fast, even on an old machine. Search Easytrax on google and you should have no problem finding...
1429 rolanyang Offline Send Email Apr 6, 2003
3:42 pm
El Cheapo Hydrometer Here is an idea: Use a small test tube with a few lead fishing weights at the bottom for a hydrometer. Seal the top, drop it in the...
1430 grantfair2001 Offline Send Email Apr 6, 2003
7:12 pm
I have completed and air sparger described on the Think and Tinker website. It sits in the Coleman cooler. I drilled a 9/16" hole in the lid so a piece of 1/4"...
1431 grantfair2001 Offline Send Email Apr 6, 2003
7:36 pm
Hi Adam- the HCl I have is 20 deg. Baume or about 31.5% HCl, how should I modify your recipe (in message 1367 - Preparation of cupric chloride etchant)? Grant...
1432 Adam Seychell
adam_seychell Offline Send Email
Apr 7, 2003
3:07 am
Not sure yet. I'm still experimenting as we speak. Sorry I can't give you anything definite yet. The two recipes I can compare are from ...
1433 Adam Seychell
adam_seychell Offline Send Email
Apr 8, 2003
4:44 am
I found that higher copper gives faster etch. Currently I get around 15 minutes etch time at 20°C for 35 um copper, bubble agitation with a solution composed...
1434 grantfair2001 Offline Send Email Apr 8, 2003
6:58 am
Wow, you have been hard at work. Congratulations on your findings. I just bought a new Grade B burette on the weekend and it shipped today <g>. (I had decided...
1435 Adam Seychell
adam_seychell Offline Send Email
Apr 9, 2003
3:03 am
... The price here in Australia for basic class B burette is about AUD$55 ...
1436 grantfair2001 Offline Send Email Apr 9, 2003
4:22 am
The price for my Grade B, teflon stopcock 50 mL burette was $48.00 Canadian, which equals AUD$55. I was thinking about buying a used burette from an internet...
1437 Adam Seychell
adam_seychell Offline Send Email
Apr 9, 2003
4:51 am
... thats what I paid :) ... thanks, you can use kitchen scales to measure out the copper wire. Sometimes copper wire strands are coated with lubricants and...
1438 rolanyang Offline Send Email Apr 9, 2003
5:26 am
Umm.. you can buy Copper Chloride powder and mix it with water+HCl. It's a lot easier and you can obtain a more accurate concentration right away. ...
1439 Adam Seychell
adam_seychell Offline Send Email
Apr 9, 2003
6:13 am
... Just think 5 liters of etchant at 150g/l of dissolved copper then you'll need to 4.4 pounds of CuCl2.2H20 or 5 pounds cost you 5*$39 = US$195 if you buy...
1440 grantfair2001 Offline Send Email Apr 9, 2003
7:02 am
Yeah, and my tank will hold up to 34 litres, and the Canadian chemical supplier I found will sell me CuCl for $175/lb. Even 5 litres worth would be beyond my...
1441 Adam Seychell
adam_seychell Offline Send Email
Apr 10, 2003
3:57 am
Grant, There is some interesting reading inside the technical section on http://www.oxfordvue.com/ ...
1442 grantfair2001 Offline Send Email Apr 11, 2003
4:10 am
Hi Adam - well this is quite timely, since the source I hoped could provide methyl orange, Cole Parmer (LabCo in Canada) does not sell chemicals and to date,...
1443 grantfair2001 Offline Send Email Apr 11, 2003
8:47 pm
It also appears that copper analysis chemicals might be easy to find- ammonium hydroxide is available as household ammonia, (though I don't know at what...
1444 stefan_trethan Offline Send Email Apr 12, 2003
7:02 am
First Hi to all, as you may guess I'm new to this Group. If I don't regard any rules or common behavoir suggestions please point it out. To the question: I...
1445 adam Seychell
adam_seychell Offline Send Email
Apr 12, 2003
11:48 pm
Well, the CuCl2 etching is basically what is happening in your solutions, the difference between the etching technique discussed recently on this group and the...
1446 Stefan Trethan
stefan_trethan Offline Send Email
Apr 13, 2003
7:20 am
I see... Thanks for the explaination. I already had the idea that basically the same might happen after writing the post. But i don't fully understand why all...
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