Here's another project I completed recently. For my all-tube audio system, I wanted an all-tube FM receiver. I found a Monarch FM-100 (sorry, I don't have a photo handy) and it works great, but it's mono and I wanted to have FM stereo. Luckily, it has a built-in output for MPX so I decided to build a multiplex decoder. I found a circuit online that uses a Motorola MC1310P IC that was made specifically for FM multiplex decoding. At first I tried to run it with a 9V battery, then a 12V wall wart but it was pretty unstable, so I built a 12V regulated power supply and put the whole thing in a metal project case that I picked up at a swap meet recently. It works great and I'm pleased with it. Check it out! Thanks for looking. 😁