David C. Partridge wrote: > I'm going to place an order for the PCB for my frequency divider in the next > few days. If I can get a batch of ten ordered the cost will be about USD60 > each plus postage to wherever you are. PCB is four layer, 5" by 3.5", pads > will be electrolytic Ni/Au (this house doesn't charge extra for that). > > Au plating leaves the solder joints vulnerable to the formation of the AuSn intermetallic compound which will lead to joint failure. You may need to remove the Au before soldering. > The price goes down as the numbers go up of course. If anyone thinks they > can better this price, I'm happy to ship the gerbers and NC drill files. > > I never did hear back from Magnus about the circuit driving the selectors on > the '4051, so that stays as it is. > > I have one firm request from Norman J McSweyn. > > If anyone else would like to order a PCB please could you email me directly > (rather than on list) at > > david dot partridge at dsl dot pipex dot com > > I also have a few spare of the '4017 dividers and lots of BAV99 which I'm > happy to pass on at cost to me. > > Cheers > Dave > > > Bruce
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