hole sizes for chassis plans

[PRNDL]

Does anyone have a handy guide that lists the hole sizes for various components (tube sockets, pots, lamps, fuse, etc).

I'm making CAD drawings of my latest amp build with the idea of having a custom chassis built the next time.

Thanks!!

FYI - I've attached the plans for the top and bottom of the chassis (with incorrect hole sizes).

[Don Moose]

I don't have any information to give you, just a suggestion.

Make the tube socket holes big enough to mount the sockets from INSIDE the chassis. That way you can make a template (cardboard) with holes where everything needs to go, wire it all up and then stuff it in the chassis. (doesn't include the trannies or 'doghouse' caps, but you get the idea).

Just (part of) a thought.

[stokes]

It is probably best to buy or at least research your parts first,different manufacturers will have slight differences in sizes,for example some octal sockets will need a 1" hole,some 1 1/8" etc.

[tubeswell]

I have used 1 1/16" diam octal sockets (of all the dang sizes). 7/8" is common for noval sockets. The switches I use are 1/2" diam, the fuse holders are about 13mm and the fender pilot light brackets require about 17mm or 18mm I think.

I use assorted sizes of chassis punches for everything, except the fuse holder and pilot light holder holes, where I start withe 1/2" chassis punch, and widen each hole gradually and carefully with a fine circular metal file until its the right size.

[PRNDL]

Hoffman's catalog has sizes, which made it easier than it first appeared.

[Paul P]

Hoffman's catalog has sizes, which made it easier than it first appeared.

That's ok if you buy from them. They do vary quite a bit. You also have to
think about whether you're going to install them inside or outside the chassis,
if the preamp tubes will have shields, and if the power tubes and rectifier
will have retainers.

I'm with stokes in that it would be best for you to get all your parts together
before worrying about your chassis.

Paul P

[PRNDL]

Thanks Paul,

Actually, the amp is already finished and for sale at the local music shop (alongside some boutique amps that are almost triple the price of one of my prototypes).

I thought it might be a good idea to document the chassis for the next build.

Also, I'd like to get something thicker than the Hammond aluminum chassis, and was thinking of having someone else build it.

Plus, I like to have continuous quality improvement.