File - monthly.txt
2015-12-01 by Homebrew_PCBs@yahoogroups.com
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GMP Mylam-12 Laminator (Press'n'Peel) randomly tripping.
2015-11-14 by Phil Quinton
I currently use a GMP Mylam-12 Laminator for Press n Peel work. I ve come to try it today and found that as the copper board gets to the centre (front to
Re: [Homebrew_PCBs] Re: Finding a vintage green colour copper clad
2015-11-03 by Brad Thompson
... Hello-- You might try contacting abcfab via its eBay presence... http://stores.ebay.com/PCB-Laminates-Copper-Clad/_i.html ...While the seller may not
Re: Finding a vintage green colour copper clad
2015-11-02 by roger@...
Brad, I would suggest you just try to locate the G10 material and use the dry film available on ebay. Photo sensitive materials degrade over time and G10 has
File - monthly.txt
2015-11-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder for Homebrew_PCBs list, please read: Messages and threads: Please do NOT start a new thread by replying to another message. Even if you change
Finding a vintage green colour copper clad
2015-10-31 by Brad
Hi there, Wondering if anyone could point me in the direction of a vendor who has presensitized G10 boards that resemble older vintage boards, preferably in
Re: FS: surface-mount component Blivet
2015-10-30 by alienrelics@...
Please post general electronics for sale posts to Electronics_101. Any for sale items here should be directly related to making PCBs. Steve Greenfield AE7HD
RE: [Homebrew_PCBs] Re: G-10 questions
2015-10-07 by Tony Smith
Wrong paper, the stuff you had was for an inkjet printer. You need to check if the paper is for laser. I don’t know what the different coatings are but
RE: [Homebrew_PCBs] Re: G-10 questions
2015-10-06 by Brad
I tried using glossy photo paper in my laser once (by accident).. the heat caused it to melt kind of and shred itself. Maybe the wrong printer? I have an
RE: [Homebrew_PCBs] Re: G-10 questions
2015-10-06 by Malcolm Parker-Lisberg
You can get toner transfer sheet on ebay from China, but I use gloss photo paper meant for ink jet printers to print the laser image onto. I then place the
RE: [Homebrew_PCBs] Re: G-10 questions
2015-10-06 by Brad
Thanks guys. I think the important thing for me is getting as close as I can to original material/look. If the toner process works just as well and avoids
Re: [Homebrew_PCBs] G-10 questions
2015-10-05 by lists
In article , Malcolm Parker-Lisberg mparkerlisberg@yahoo.com [Homebrew_PCBs] ... I was using car
Re: G-10 questions
2015-10-01 by Paul Alciatore
... Malcolm, You are quite correct. I had meant to go back and check that but forgot. Thanks for keeping me honest. Apologies to all for the mistake. Paul A.
Re: [Homebrew_PCBs] Re: G-10 questions
2015-10-01 by rolohar@...
Sweet Memories: There was once a really super company called Kepro. They sold presensitized (with Kodak KPR) boards stock, both paper and G10 epoxy, for very
File - monthly.txt
2015-10-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder for Homebrew_PCBs list, please read: Messages and threads: Please do NOT start a new thread by replying to another message. Even if you change
RE: [Homebrew_PCBs] G-10 questions
2015-10-01 by Brad
Thanks guys. I’ll tell you why I’m wondering about this. Recently I missed, by inches, an auction on ebay that offered supposedly original SWTPC TV
Re: G-10 questions
2015-09-30 by roger@...
I also built boards in the early years. One of the spray on resists was produced by a company called Dynachem. It was a system that required a solvent
Re: [Homebrew_PCBs] G-10 questions
2015-09-30 by Corey Minion
in the 70s as a jr high and high school teenager I used tshirt silk screen kits from the craft/toy store with staedler mars drafting pens on overhead projector
Re: [Homebrew_PCBs] Re: G-10 questions
2015-09-30 by Malcolm Parker-Lisberg
Paul Just to correct your statement Then the boards were exposed to either direct sunlight or a bulb that had heavy IR content in it s light. The resist is
Re: G-10 questions
2015-09-30 by palciatore@...
OK, I made PC boards in my garage back in the 70s. I used a variety of techniques. First, you wonder how the copper got on the boards. Well, even back in those
Re: [Homebrew_PCBs] G-10 questions
2015-09-30 by Leon Heller
On 30/09/2015 10:53, Dave G4UGM dave.g4ugm@gmail.com [Homebrew_PCBs] ... I vaguely remember using a Decon Dalo pen around then (they are still available),
Re: [Homebrew_PCBs] G-10 questions
2015-09-30 by Will
I used to do the same, using Humbrol model paint on carbon paper trace. For simple things I would paint direct on SRBP. No glass fibre. Cheers, Will On
RE: [Homebrew_PCBs] G-10 questions
2015-09-30 by Dave G4UGM
When did etch resist pens come in? Pretty sure they were around in 1972.
RE: [Homebrew_PCBs] G-10 questions
2015-09-30 by Malcolm Parker-Lisberg
Brad The simple answer is no. Laser printers did not exist then so toner transfer was not possible. Silk screen materials were available and you could do a
Re: [Homebrew_PCBs] G-10 questions
2015-09-30 by Leon Heller
On 30/09/2015 00:14, Malcolm Parker-Lisberg mparkerlisberg@yahoo.com ... A resist-coated fibre glass and paper composite (FPC 16) is available from Mega
RE: [Homebrew_PCBs] G-10 questions
2015-09-30 by Brad
Thanks muchly Malcolm. That makes things a lot clearer. Question – did you do any silkscreening back then for parts placement? I notice in the plans
Re: [Homebrew_PCBs] G-10 questions
2015-09-29 by Malcolm Parker-Lisberg
Back in those days I used two methods: Copper clad FR4 was available, but a lot of SRBP was used as it was much cheaper. The first method was to paint, by
G-10 questions
2015-09-29 by Brad
Hi guys, I ve been continuing to research and amass parts for my TV Typewriter replica build. I have a blog of it here: http://bradhodge.ca/blog -- mostly
RE: [Homebrew_PCBs] Re: Fantastic results with cheap sign vinyl as toner transfer medium
2015-09-16 by MIKE DURKIN
Finally going to make some headway ... Does it matter if its coloured -- ok besides black, you would have a hard time seeing the toner ..... Just as long as
RE: [Homebrew_PCBs] Nice Inkjet Film for the DIY Photoresist Crowd
2015-09-02 by Mike Short
Hi Everyone, I just wanted to chime in on this. I agree with Stan. The good quality inkjet film for screen printing will have a coating on the print side. You
Nice Inkjet Film for the DIY Photoresist Crowd
2015-09-02 by stan_katz@...
I came across an inkjet film on Ebay intended for making dye separations for silk screen processes. Since the cost of these films was much less than inkjet
File - monthly.txt
2015-09-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder for Homebrew_PCBs list, please read: Messages and threads: Please do NOT start a new thread by replying to another message. Even if you change
Re: [Homebrew_PCBs] Re: SWTPC TV Typewriter replica board project
2015-08-26 by Harvey White
... Ok.... ... That s the camera process and photoetched. ... Ok, not a quite easy thing to do. Most boards are generated from Gerber files. When those
RE: [Homebrew_PCBs] Re: SWTPC TV Typewriter replica board project
2015-08-26 by Brad
Thanks muchly guys. I guess being new to the art of PCB fabrication, I’m trying to figure out how I could get as close as possible to the appearance of the
Re: [Homebrew_PCBs] Re: SWTPC TV Typewriter replica board project
2015-08-26 by Cecil Bayona
Way back in the late 70s I built a similar unit, the PCB was available then I added all the other parts. I don t remember if it s the same unit, the one I
Re: SWTPC TV Typewriter replica board project
2015-08-26 by James Newton
Cool project Brad! You have the PCB layouts in the reprint PDFs, just print them out (be sure to set no size reduction) and make sure they fit the components,
SWTPC TV Typewriter replica board project
2015-08-25 by unclefalter@...
Hi there, I am currently working a recreation of a famous computer , the TV Typewriter, which was made by Don Lancaster in 1973. Here s a photo of the
Re: [Homebrew_PCBs] DIY Drill press for Dremel type tool
2015-08-19 by alan00463@...
I found a small tabletop drill press (forgot what Proxxon called it) to hold my Proxxon IB/E rotary millilng tool vertical, so I can use it to drill holes in
Re: [Homebrew_PCBs] DIY Drill press for Dremel type tool
2015-08-18 by Harvey White
... I invested in more precise drilling equipment, using a Proxxon mototool with steel collets running on a computer controlled linear bearing. (overkill
Re: [Homebrew_PCBs] DIY Drill press for Dremel type tool
2015-08-18 by bobledoux@...
As a hobby builder I drill FR-4 with steel bits. They dull more quickly, but they are cheaper and will not shatter when used in sloppy tolerance hobby tools.
Re: [Homebrew_PCBs] DIY Drill press for Dremel type tool
2015-08-16 by Rick Sparber
Lateral play is critical. Given a drill bit 0.03 in diameter, 0.01 of lateral play can snap it. Rick
DIY Drill press for Dremel type tool
2015-08-16 by leeleduc@...
Saw this today and thought it might be useful for PCB drilling. Drill press for ~$20 http://www.instructables.com/id/Drill-press-for-20-21/
File - monthly.txt
2015-08-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder for Homebrew_PCBs list, please read: Messages and threads: Please do NOT start a new thread by replying to another message. Even if you change
Re: [Homebrew_PCBs] Re: Gluing 2 single sided boards to make a double sided board.
2015-07-07 by Harvey White
... Dremel has a very bad chuck and bearings for PC board drilling. If the stand has any kind of wobble in it, that will also have an effect. If you have
Re: Gluing 2 single sided boards to make a double sided board.
2015-07-07 by Howard Chester
Here is a few tips to get good centering of vias & through holes. 1) Copy and paste your final PCB layout to the desktop & rename xxx Shrink ,(where xxx is
Re: Gluing 2 single sided boards to make a double sided board.
2015-07-06 by jamesmichaelnewton@...
Yeah. This gets re-hashed every few years. It s a valid technique, but not necessarily any easier than just making sure your masks line up when etching a
Re: [Homebrew_PCBs] Gluing 2 single sided boards to make a double sided board.
2015-07-06 by Harvey White
... You d like three, and asymmetrically placed (say three of the four corners). It s possible to get the board reversed if you re not careful, so the three
Re: [Homebrew_PCBs] Gluing 2 single sided boards to make a double sided board.
2015-07-06 by <n0tt1@...>
I would be more inclined to drill just two holes on opposite sides of a double-sided board before exposure/etching so that alinement would be a lot easier.
Re: [Homebrew_PCBs] Gluing 2 single sided boards to make a double sided board.
2015-07-06 by Harvey White
... I used to use pcb rivets, but they took too much space. For my boards now, I use #26 wire and lace the vias together, solder both sides, cut them free,
Re: [Homebrew_PCBs] Gluing 2 single sided boards to make a double sided board.
2015-07-05 by James
Interesting ideas everybody, to so summarise everybody s comments 1. it does work 2. use alignment holes and pins as a jig to align the two sides 3. use epoxy