Homebrew PCBs

Hi Bill, many thanks for the reply I think I am to basic with my needs for most people on this board. I don't make enough boards these days to get to the level of the others and I don't like the toner transfer system I find it is to uncertain for what I need it for (10 GHz boards $1.45 sq.inch) but the same situation exists here I have a number of sq ft. of negative board and I don't know if it will still work either. I find that I can't get an opaque enough negative from the computer either inkjet or laser so I am going back to film am waiting for a supply coming in from Germany as Kodak and all of the other manufacturers have stopped making lith film. RCS in Sydney are supposed to have something that will work but I can't get Bob to answer emails with details and there is a company in Perth with a version of 8007 but it is a stripping type of film and I doubt the accuracy and at $90 a packet I'm not willing to risk it.
Kalex have given up looking , I spoke to Jenny the other day and she had heard no more .
Ok sorry to beat you around Bill but I am getting frustrated and living in the bush (Western Victoria) doesn't help.
I would like to hear what you have found as alternatives seeing as we are both in the same boat.
All the best,
Don....VK3YV
  ----- Original Message ----- 
  From: Bill Maxwell 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Wednesday, June 30, 2004 6:28 PM
  Subject: Re: [Homebrew_PCBs] SCOTCH 8007


  G'day Don

  I am about two weeks behind in clearing e-mails but I note that you dont
  appear to have had a response as yet.

  I'm afraid I dont have good news for you, unless finding a fellow sufferer
  is useful.  We are both the victim of limited shelf-life of Scotch 8007.  In
  my case I have a full pacxket, less about two sheets, that I bought back in
  about 1992.

  Nobody ever told me that it had a limited life and it certainly isn't
  mentioned in the literature that came with the box but that is the simple
  truth, as I found out after checking with a couple of development labs and
  finally Kalex (?) in Melbourne who used to be a major agent for the stuff.
  They were trying to find an alternative reversing film but hadn't been able
  to find anything that was comparable in price, when last I checked about two
  years ago.

  I did suspect the developer at first but then I was given a huge supply of
  that from a closed Govt lab.  It contained a number of very different batch
  numbers but none could develop the 8007.  That was when I started to ask
  questions around the trade.

  I too have a considerable quantity of Ristron negative pcb material, that
  may or may not still be ok.  I have been meaning to make up a  negative
  design on the computer and do a trial exposure to see what state of health
  it is in but haven't gotten around to it.  Hopefully it might be ok and if
  so, I might be out of my jam as it is relatively easy to reverse drawings on
  the pc to produce a negative - or at least it should be.  I haven't tried
  that either yet.

  Meanwhile, 3M has stopped making Scoth 8007 and Scotchcal, the panel
  material it was originally intended to be used with.

  Cheers

  Bill   VK1MX & VK7MX


  ----- Original Message -----
  From: "don2822003" <don282@...>
  To: <Homebrew_PCBs@yahoogroups.com>
  Sent: Thursday, June 17, 2004 12:55 PM
  Subject: [Homebrew_PCBs] SCOTCH 8007


  > Hi all, I am new to this group and come recomended by the AMATEUR
  > REPAIRS group. I am in Australia and have a question. Can anyone help
  > me with the instructions for using 8007 reversal film. I have used it
  > a lot in the past but either my memory has failed me or the film I
  > have left or the developer have gone off. I can find no information
  > on the net at all. If it is the developer gone off is there any thing
  > else that will do the job. I have a quantity of negative acting
  > circuit board I wish to use and do not like the TTS system. Any other
  > Ideas would be most welcome as I only have 1 sheet of 8007 left.
  > many thanks ,
  > Don VK3YV.
  >
  >
  >
  >
  >
  > Be sure to visit the group home and check for new Bookmarks and files:
  > http://groups.yahoo.com/group/Homebrew_PCBs
  > Yahoo! Groups Links
  >
  >
  >
  >
  >



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