colophony as pcb protection - long term?
2005-01-30 by Stefan Trethan
I have recently bought a can of lötlack made by kontakt chemie / crc industries germany. The text on the can tells me it is colophony, and the smell tells
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Re: [Homebrew_PCBs] Re: Buying PCB Chemicals in Israel??
2005-01-30 by Stefan Trethan
On Sun, 30 Jan 2005 18:54:00 -0000, jamalzaghal ... I dunno about israel, but what chemicals are you looking for? I suggest you go for
Re: Buying PCB Chemicals in Israel??
2005-01-30 by jamalzaghal
Hi, Could you please direct me to buy chemicals here in Israel. Thanks.
Re: Blower for hot air solder??
2005-01-30 by Thomas P. Gootee
... Sometimes there are lots of different kinds of pumps (and lots of other interesting stuff!) available for very low prices at: http://www.labx.com Good
Re: [Homebrew_PCBs] Blower for hot air solder??
2005-01-29 by kenneth magers
you might look for a nebulizer pump square box thing i see them at second hand stores few bucks beleave it or not they are good pumps i mesured the out put at
Re: [Homebrew_PCBs] RE: Scratch & Etch
2005-01-29 by Les Newell
Try Layout blue from http://www.chronos.ltd.uk RS components http://www.rswww.com also stock layout blue but their web site is off line ATM and I haven t got
RE: [Homebrew_PCBs] RE: Scratch & Etch
2005-01-29 by Brian Schmalz
PK, I have no idea if it s available in the UK, but if it s not, there must be something just like it. Machinists use it all the time, and there are tons of
RE: Scratch & Etch
2005-01-29 by onenastyviper
Thanks to all who replied. I connected the plotter and it does work...Yay. Next items/questions/ideas burning holes in my brain... Is this Dykem(sic) Blue
Re: [Homebrew_PCBs] Blower for hot air solder??
2005-01-28 by Stefan Trethan
On Fri, 28 Jan 2005 18:00:38 -0000, gettingalongwouldbenice ... can t you run a hose to the garage? I made a small shop air system from a fridge compressor and
Blower for hot air solder??
2005-01-28 by gettingalongwouldbenice
I had the good fortune to snag a Leister Labor S7B hot air wand. It needs external air. Near as I can tell from the specs and my experiments is that I need
Re: [Homebrew_PCBs] Re: Scratch etching
2005-01-28 by Stefan Trethan
... Bob, i made a boad yesterday from 12 to 1 in the night, 2-sided smd/throughhole, both sides component legend, ground planes, about the hardest you can get
Re: Scratch etching
2005-01-28 by Bob_xyz
... time ... Since scratch-etching sounds like it can (mostly) run unattended, the time that *you* have to spend may not be all that great. Granted, it may
Re: [Homebrew_PCBs] Re: Scratch etching
2005-01-27 by Stefan Trethan
... lol, i expected you to ;-) (I agree by the way, this time) ST
Re: Scratch etching
2005-01-27 by mikezcnc
Hi Stefan, Then I will add that scratching method is not worth anybody s time unless they are imprisoned. Mike ... mechanism is ... scratch ... inconsistent
RE: [Homebrew_PCBs] RE: Scratch etching
2005-01-27 by Brian Schmalz
Hi PK, I ve done scratch etching before, and it does work well, at least in theory. :-) There are refinements to my process that need to be made before it
Re: [Homebrew_PCBs] RE: Scratch etching
2005-01-27 by Stefan Trethan
On Thu, 27 Jan 2005 15:07:12 -0000, onenastyviper ... track resolution with a OHP pen (staedtler) was bad, here. couldn t even get a trace between DIL pins,
RE: Scratch etching
2005-01-27 by onenastyviper
Hi, I have recently rescued a HP 7475A plotter and I am looking at converting it to handle pcb scratch etching (I think the mechanism is nowhere near strong
Re: [Homebrew_PCBs] Re: UV lamps? Round 2
2005-01-27 by Russell Shaw
... As long as the ink on the film is tight against the resist, close tubes are ok. The celophane plastic on dry film resist is about 0.4mil thick, so
Re: [Homebrew_PCBs] Re: UV lamps? Round 2
2005-01-27 by Terry Mickelson
Firstly, thanks to everyone who replied and a special thanks to those that also supplied URLs. I m basically screwed. My toner transfer isn t working a hundred
Re: UV lamps?
2005-01-27 by mikezcnc
Russell, Since you have mentioned teh word columination so many times, I did some checking and yes, there is a word columination but the the effect that
Re: [Homebrew_PCBs] UV lamps?
2005-01-26 by Russell Shaw
... h ... The black-light blue mercury HID lamps (125W, 250W, and 400W) are sold for stage lighting effects and don t put out the shorter wave UV. With
Re: [Homebrew_PCBs] UV lamps?
2005-01-26 by Brian Clancy
G day I am starting to regret having mentioned collimated light. I have no practical experience of this except that by spacing the light source a further 40mm
Re: [Homebrew_PCBs] UV lamps?
2005-01-26 by Adam Seychell
... t have time to migrate and it prevents polymerization in areas of lower light intensity. In other words, high intensity will overcome the effects of poor
Re: [Homebrew_PCBs] UV lamps?
2005-01-26 by Russell Shaw
... h ... The black-light blue mercury HID lamps (125W, 250W, and 400W) are sold for stage lighting effects and don t put out the shorter wave UV. With
Re: UV lamps?
2005-01-26 by mikezcnc
I could have agreed with you before I tried the same inkjet printed film with fluorescent exposure box and Hg arc with nice collimation. When I saw a dramatic
Re: [Homebrew_PCBs] UV lamps?
2005-01-26 by Earl T. Hackett, Jr.
This is getting a bit off topic. The comments below are close and when I started working with photoresists that was my opinion as well. However, when we
Re: [Homebrew_PCBs] UV lamps?
2005-01-26 by Adam Seychell
... Overall light energy and collumination are completely separate parameters with respect to photoresists. More photons simply means a faster photochemical
Re: [Homebrew_PCBs] UV lamps?
2005-01-26 by Earl T. Hackett, Jr.
The need for collumination depends upon the spaces you are trying to maintain. If you are shooting for less than 5 or 6 mils it s important. If your exposure
Re: [Homebrew_PCBs] UV lamps?
2005-01-25 by Adam Seychell
... I agree, the level of collimation depends on the resolution required. However I found the artwork produced by inkjet printers has sufficient high
Re: UV lamp exposure unit - For Sale
2005-01-25 by mikezcnc
OK, I will ad my two cents: I can sell a bottom portion of the Nuarc 26 as here http://tinyurl.com/5g4eu for $100 plus shipping. The base contains expensive
Re: UV lamps?
2005-01-25 by mikezcnc
I had a very unpleasant surprise with a commercial uv box ($600) that was unable to create SMD images on PCB. It turned out the collimation was teh issue. When
Re: [Homebrew_PCBs] UV lamps?
2005-01-24 by Leon Heller
... From: Brian Clancy To: Sent: Monday, January 24, 2005 5:26 AM Subject: Re: [Homebrew_PCBs] UV
Re: [Homebrew_PCBs] UV lamps?
2005-01-24 by Brian Clancy
G day Jason, My understanding of it is that you need to have collimated light, i.e. all light rays are coming vertical to the artwork so that it does not go
Re: [Homebrew_PCBs] UV lamps?
2005-01-24 by Jason Giglio
At work, for exposing printing plates we have a professional vacuum UV exposure table. This uses a few dozen bulbs very close to the work. Isn t this the
Re: [Homebrew_PCBs] Re: Photographic techniques
2005-01-23 by lists
In article , ... Really? I saw this...... ........I am trying to find information about printing to transparency and then using some
Re: Photographic techniques
2005-01-23 by art_lammoglia
... I ... going to ... a ... magnification of ... on a ... 1280x1024 and go ... length) ... I think you missed the original post. He wants to project the image
Re: [Homebrew_PCBs] Re: Photographic techniques
2005-01-23 by lists
In article , ... But what s the display resolution got to do with it? I don t know what you use but the package I use allows
Re: Photographic techniques
2005-01-23 by javaguy11111
I was able to find a darkroom class that will be offered in March in my area. So I will sign up for that. It give me a good chance to understand the techniques
Re: Photographic techniques
2005-01-23 by art_lammoglia
... much ... originally ... Well what kind of resolution does your LCD/Display system have? I think to get better than 1200 dpi on your 4x5 board you are going
UV lamp exposure unit - For Sale
2005-01-22 by Brian Chapman
I reviewed the list s rules on the home page, it doesn t appear I m in violation by posting this message. But, I m not positive. If I am, I do apologize. A
Re: Photographic techniques
2005-01-22 by javaguy11111
Lets try that link again.
Re: Photographic techniques
2005-01-22 by javaguy11111
I posted my question to rec.photo.darkroom
Re: [Homebrew_PCBs] Photographic techniques
2005-01-21 by Earl T. Hackett, Jr.
Note the comment about the ink. Photo inks have UV inhibitors to protect the colors in the ink. They also happen to block transmission of UV. Plain copier
Re: [Homebrew_PCBs] UV lamps?
2005-01-21 by Earl T. Hackett, Jr.
I d recommend a single bulb fixture - the smallest you can get a lamp for - and back it up with a parabolic reflector. You will be trading light columination
Re: [Homebrew_PCBs] Re: Cables and connectors - casting
2005-01-21 by Alan King
... If you do this part, get a Foodsaver. Good for food and pulls an ok vacuum in one of the cannisters. ... Try putting a loop or Z bend into the wire, and
Re: [Homebrew_PCBs] Re: Photographic techniques
2005-01-21 by Leon Heller
... From: javaguy11111 To: Sent: Friday, January 21, 2005 12:58 PM Subject: [Homebrew_PCBs] Re:
Re: Photographic techniques
2005-01-21 by javaguy11111
After thinking about it, I think I should clarify what I mean by limits. I do not mean limits of my patience. I have gotten great results with the toner
Re: [Homebrew_PCBs] Photographic techniques
2005-01-21 by Zoran A. Scepanovic
Hello javaguy11111, Friday, January 21, 2005, 3:27:32 AM, you wrote: j I am trying to get more information on using photographic techniques j for making
Re: [Homebrew_PCBs] Photo PCBs in OZ
2005-01-21 by DHC
Have a look at: http://www.cia.com.au/rcsradio/ for PCB supplies. Cheers, Darcy ... From: John Craddock To: Homebrew_PCBs@yahoogroups.com Sent: Friday,
Re: [Homebrew_PCBs] Photographic techniques
2005-01-21 by Leon Heller
... From: javaguy11111 To: Sent: Friday, January 21, 2005 2:27 AM Subject: [Homebrew_PCBs]