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Archive for January 20th, 2016

Ham It Up Noise Source Enable Switch

Some rummaging produced a tiny DPDT switch that actually fit the holes intended for a pin header on the recently arrived Ham It Up board, at least after I amputated 2/3 of the poor thing’s legs:

Ham-It-Up - noise source switch - B

Ham-It-Up – noise source switch – B

The new SMA noise output jack sits in the front left, with the white “noise on” LED just left of the switch:

Ham-It-Up - noise source switch - A

Ham-It-Up – noise source switch – A

There’s no way to measure these things accurately, at least as far as I can tell, but the holes came out pretty close to where they should be. The new SMA connector lined up horizontally with the existing IF output jack and vertically with the measured / rounded-to-the-nearest-millimeter on-center distance:

Ham It Up - noise SMA drilling

Ham It Up – noise SMA drilling

The Enable switch doesn’t quite line up with the LED, so the holes will always look like I screwed up:

Ham-It-Up - noise source switch - case holes

Ham-It-Up – noise source switch – case holes

That’s OK, nobody will ever notice.

Now, to stack up enough adapters to get from the SMA on the Ham It Up board to the N connector on the spectrum analyzer …

 

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