This is another Swan 350 I got from an estate. Built around 1968, and surprisingly enough, it worked! I gave it s good cleaning, painted the cover, replaced a few caps, serviced the controls, etc. Someone added a sidebar reversal switch, but otherwise, it's pretty much original. I didn't document this one very good, but here's a few pics...
I've been in Amateur Radio since 1974, and still find new and interesting things to do. I like to build, restore, and operate on the air. This blog has been running for many years, so be sure to check out "Jump to Posts on Specific Topics" in the RH column to drill down and find lots of stuff. Visit www.WB4IUY.net for the lowdown at WB4IUY. Email me at wb4iuy@gmail.com if you have any questions.
Thursday, August 28, 2025
Tuesday, August 19, 2025
4-Tube Elkin Repairs
This is a 4-Tube Elkin amp a friend picked up at a hamfest. It was in need of a bit of repairs and some updates. The Elkin amps are grid driven, link coupled, push-pull Class Ab2 designs. Very clean spectrally, well made, and were regionally popular on CB in the 60's through the 80's. It was named for the town in was built in, Elkin NC.
Some of the later mobile models were band switched for 40 through 10m, and the tank in input circuits of the fixed station amps were tapped. I ran a 12-tube version on 40m for many years, with 0 problems.
Here's a batch of pics, some vids, and descriptions:
A few pics above of the finished amp...
2 Plate caps were broken free of the aluminum tank coil. That stuff has to be soldered with a combination aluminum rod.
Swan 500C Restoration
This is an old Swan from a local SK's estate. It had been out of service since it died in 1998 (according to notes inside the cabinet). It was pretty grungy. I gave it a good cleaning, serviced all of the controls and switches, recapped it, changed a handful of out of spec resistors, replaced the RF choke in the PA, and replaced one of the shorted tubes in the PA. The cases got a new coat of paint, too. She's back up and running, and looking good! Here's a few pics...