Trying to make a vision IF and Detector - fun!

[ppppenguin]

The lower grade alternative I often used was pinboard (like veroboard without copper strips) with a heavy earth bus round the edges and sometimes built up as a grid of wires. Worked well in the 10MHz video bandwidths I often used. The stray capacitances to ground are lower using this technique than with Manhattan or indeed a proper PCB with ground plane. I've selectively removed ground plane around sensitive nodes on occasion. The non-inverting input of a high speed op-amp, notably current feedback types, is very sensitive to stray C.

None of this should be worrying Adrian who has chosen an intrinsically good and predictable way to build his prototypes.