by EWBrown » Tue Oct 24, 2006 6:14 am
Very nice! I like the idea of building it into the wooden tool carrier.
One small precaution, I notice that you are using the chassis as a common ground return (most terminal strips), that can and will work, but a mechanical connection can eventually go bad or open, I'd suggest running a buss wire to all the mechanically grounded points, and back to the filter cap's common (negative or can) connection just for safety and that last little bit of noise elimination.
edit: 10-25-06
I've seen this "chassis ground" scheme used in plenty of comercially made gear, and is common practice at radio frequencies An H H Scott 310 FM mono tuner that I have, uses a copper plate "sub-chassis" as a ground plane, and there are a LOT of components and connections soldered to it, and the unit works and sounds very good. At RF frequencies, short and direct connections are a must, as lead length equates to increasing inductance with increasing frequencies, , and can cause all sorts of weird instabilities on their own.
I've seen sticky-back copper foil (or think of it as wide copper tape) at hamfests and surplus shops, and I've picked some up to experiment with, with the intent of sticking it under the top of the chassis and trying to use it as a ground plane, with direct solder connections as needed. I also thought of trying it as a chassis top cover, but it does scratch and mar very easily. Even a fingernail can leave a hard-to-remove mark in it.
/ed B in NH
Last edited by
EWBrown on Wed Oct 25, 2006 5:22 am, edited 1 time in total.
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