David and Patrick, Check out the following two sites to get an idea of the current costs to have a custom made board produced.
http://www.pcb123.com/ http://www.expresspcb.com/index.htm Richard > Hi David and list > > I am quite interested in this post too. > > I have wanted to fabricate my own PCBs for several years now but I have > never made an attempt. I am set up here to do silk screening and I have > ovens and a hot-air soldering iron. Has anyone else tried to fabricate > their own boards or is the price of farming the work out just so low now? > > If anyone has farmed out work, could you please feedback as to the entry > level costs and if possible, some suggested companies? > > P.S Many of the boards I want to fabricate are replacements for obsolete > ones. Is there a way to split the layers of an old board apart to study > them? > > Thanks-Patrick > > David C. Partridge wrote: >> I've been working on the design for a frequency divider to complement the >> Thunderbolt I recently bought from TVB (thank you Tom, it's working very >> well as far as I can tell, though of course I've no other standard to >> compare against). >> >> Thanks to lots of advice and guidance from Bruce Griffiths (many thanks >> again Bruce), I've got the design near completion. >> >> I'm not aiming for NIST or equivalent perfection in terms on minimising >> jitter and other noise, but would like to at least make a at least a >> half-way decent job of this. >> >> I'm now thinking ahead to the PCB requirements,with the caveat that I've >> only ever designed one PCB before and that was a single layer board done >> using double sized mylar and sticky black tape (Yes, it was a good many >> years ago). >> >> Now to questions: >> >> 1. Surface mount or through hole? I don't have a re-flow oven (or even a >> hot air soldering system), so my inclination is to use through hole CMOS >> (74HC163s with 74AC glue logic and flip-flops), with the surface mount >> restricted to the clock shaper using a BAV99 and either an ADCMP600 or >> MAX999 and surrounding components. Will using through hole cause me grief? >> >> 2. How many layers? In an ideal world with money no object, if I >> understand the current art correctly, I think I'd probably aim for a five >> layer board with Vcc, Digital Ground and Power Ground being separate >> internal planes, and trace routing on the top and bottom of the board with >> as few vias between top and bottom as possible. Does that sound right? >> >> Do you think I can safely restrict myself to two layers, and if so does it >> make most sense to make one side of the board digital ground, and route >> everything else (Vcc, Power/Analogue Ground, and signals) on the other side. >> Or is there a better approach (always assuming that a two layer board is a >> viable option). >> >> Cheers >> Dave Partridge >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.