Jim Strohm <jstrohm@...>
On Jun 27, 2004, at 6:16 AM, vdberghak wrote:
Looking at the pictures of other builders, I see several 'islands',The only reason(s) I can think of _not_ to make 'em float in the air is that this technique has the potential to make the circuit sensitive to microphonics. And in a high-vibration or high-shock environment such as portable or mobile use, the solder joints would tend to fracture and eventually cause intermittent failures long before any visual breakage was apparent.
What I also saw is that the x-tal filter has no kind of shielding.Well, you could take the PCB scraps you saved by not using "island" construction, and use it to make shielding.
What's that old bromide -- "You can never be too rich, too thin, or have too many friends" -- add to that the idea that your electronics can never have too much shielding.