Pomona BNC Box Substitutes

Those Pomona 2391 and 2401 BNC boxes are real time-savers, but can get expensive, especially if you need a lot of them.

I instead use the far cheaper Pomona 3754 and 2428 boxes, which I then top with PCBs with right-angle BNCs, like this:

That's the 3754 on the left, for two-port circuits, and the 2428 on the right, for 3- or 4-port circuits.  

In the foreground is the underside of the PCBs.  By cutting the traces with an X-Acto knife, you can solder through-hole or surface-mount components in series or parallel.

Here are the Altium source files for the 2-port box:

and the Gerbers:

Here are the Altium source files for the 3- or 4-BNC port box:

and the Gerbers:

Here's a 4-port SMA version, like DMNO_P2428, but it fits into a 3754 box:

Altium source files:

and Gerbers: