updated May 9, 2016
I've used a variety of props for amp chassis... wood blocks, bricks, even paint cans. If you're like me and build an occassional amp, you probably feel that a cradle is a luxury that you can do without. People who build or service lot's of amps know that a cradle is as important as a workbench, or DMM.
So, this spring I find I don't have any amp projects in mind, and now that the garden is up and running and yard projects have slowed down, I headed back to the shop for some light duty project. I decided I would finally build a cradle and quit fumbling for stuff to prop an amp on.
But which one? I wanted something simple, cheap, and easy to build. After looking at quite a few cradle designs online I realized there was a wide variety, from primitive to showcase quality. I borrowed some features from several, mixed in some ideas of my own, and this is what I came up with.
I used scrap mahogany from my shop. If I had to buy dimensional lumber I'd use 2 x 8 and 1 x 2 material. I had all materials on hand except the thumbscrews. Oh well, I needed to run to Lowe's anyhow.
This cradle will accommodate most chassis that are 0" to
24" long. If I need longer, I'll just cut two more pieces of EMT. The arms are
adjustable with four posi-stop holes indexed at 0°, 20°, 40°, and 60°. I suppose
the downside is not having continuously adjustable tilt. The upside is never
having to worry about the arms slipping and accidently cracking your tubes.
Watch this short video to see how easy it is to properly install the brass threaded inserts...