[time-nuts] PCB for frequency dividers

[Bruce Griffiths]

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