Showing posts with label SWR. Show all posts
Showing posts with label SWR. Show all posts

Tuesday, January 2, 2024

Homebrew SWR Meter from 1975...

 OK, this isn't something to "write home about", but I kinda surprised myself and wanted to document it before it was lost forever. I was a kid, and building stuff from old handbooks from junk. Scrap TV sets, junk radios, hamfest scrounges, etc. I cobbled this together, and it actually worked! Recently, while digging through some junk in the barn while looking for some parts, I stumbled onto it. The back was missing, the meter was damaged, and I don't know how the internals weren't smashed out of existence. 

I brought it in the shop, and checked it over. The rotary switch needed cleaning, I found another 50uA meter to put in, and checked it out. It worked. Wow...49 years ago. I cut out a new back panel for it, drew the schematic, and used a black felt tip to color in the lettering that was in horrible condition. Maybe I should shoot a coat of matte clear on it to protect what's left. Anyway, here it is, all these years later. It's not going back in the junk pile, until my days pass :-)







Dave WB4IUY

http://www.WB4IUY.net