Date : Mon, 01 Jun 2009 16:56:00 +0100
From : jackleather@... (Jack Leather)
Subject: BBC Master SCSI
i have several pet projects that have only gotten as far as the drawing
board.
i would interested in the names and addresses of any Chinese (or
otherwise) PCB houses, their costs and turnaround times regardless of
cheerfulness :-)
Mark Haysman wrote:
> Hi.
>
> I presume you're referring to the Tooling charge, where you send the CAD
> files to them and they make the board from that? You're not sending them a
> blank PCB to copy are you?
>
> The PCB houses I've worked with have always done their own in-house Tooling,
> and usually costs around the ?60 mark for smallish boards, and is a one-off.
> The economy of scale dicatates that they will make a certain amount of PCBs
> per "run", so if you only order 20, they may end up making 50, and charging
> you a lot more per board for those 20 than they would if you took the full
> 50, as they're not wasting any.
>
> There are PCB houses in China which are cheap and cheerful, but it's always
> a case of "you get what you pay for", and they take longer too.
>
> Mark.
>
>
> ----- Original Message -----
> From: "Ian Wolstenholme" <bbcmailinglist@...>
> To: <bbc-micro@...>
> Sent: Monday, June 01, 2009 2:20 PM
> Subject: Re: [BBC-Micro] BBC Master SCSI
>
>
> There's one just ended on E-Bay!!!
>
> I've had duplicate boards made in the past (eg. the Econet module and
> SJ Econet clock with slight modifications) and although the cost is fairly
> prohibitive (hence the selling price of these items) I'm sure it could be
> done if there is any demand.
>
> It's almost certainly not economic to do anything less than 50 and I don't
> think I could ever shift that many.
>
> One of the major components of the cost in the past has been the PCB
> artwork, they said that this cost would not arise if I ever needed a second
> run (!!!) of anthing, so if somebody else could do this work, it might bring
> down the overall cost a bit.
>
> There are several people on the list who are selling items with manufactured
> PCBs, somebody might be able to produce a board a lot cheaper than my
> method of sending one off to somebody and saying "Make me this".
>
> One obvious area of improvement (apart from the resistor which seems to
> run ridiculously hot) is the SCSI connector which would benefit from a
> more solid set of pins going into the BBC motherboard connector.
>
> Best wishes,
>
>
> Ian
> ----- Original Message -----
> From: Darren Grant [mailto:darren.grant@...]
> To: bbc-micro@...
> Sent: Mon, 01 Jun 2009 13:21:52 +0100
> Subject: [BBC-Micro] BBC Master SCSI
>
> Would anyone have a BBC Master AIV SCSI Interface they would like to sell me
> by any chance ?
>
> Thanks
> Darren
>
>
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