Almost time to start soldering

Here’s the layout plan (for everything except from the OT secondary to the outputs, which are trivial to do):

Beamer Layout

It’s easier to read when printed, but the different sections of wiring are on different layers, so on-screen I can choose layer colors that emphasize the section I’m working on. I’ll post the LibreCAD file when I have time to work around WordPress (it won’t upload .DXF files).

Finally getting serious about layout

I make a point of getting out in nature for a stroll at least a few times a week, but this &^%$ pandemic and my chemo vacation have given me the time & mental energy to finally get serious about the Beamer layout.

I’ve “finished” a chassis drilling drawing (maybe 2 more holes…) to give to my son & his milling machine, and I’ve been making progress on the electrical layout and one part is done. Knowing that maximizing the IN-13 performance would require some experimentation, I wanted to lay out the circuit on a small prototyping board (and use trim pots in a couple of extra places). This Adafruit board is only 2 x 1.7 inches and looks like it will do the trick nicely:

This is the layout I generated in LibreCAD for the IN-13 circuit at the left side of the power amp schematic page:

Note that the B+IN13 supply rail goes directly to the tube. Did you spot the change from the schematic?

The full chassis layout looks a little different, but uses similar shorthand. Components are just sketched in with rough sizes & only enough detail to identify the part; parts overlap without any indication of final 3-dimensional status. The emphasis is on connections while ensuring enough space.

I’m getting pretty good at LibreCAD, btw…