I restored this beautiful Heathkit SB-102 for a friend in Kentucky. While in great cosmetic condition, it had some of the typical aches and pains of a 50+ year old radio. She needed recapping, had a handful of carbon resistors way out of spec, a few bad tubes, tube sockets not making connection, dirty switches, etc. To top that off an rf transformer was open (probably a near lightning strike), and a few incorrect parts were installed in places. Oh, I forgot to mention, it had shipping damage. That's a little tougher than just repairing something that quits working :-) Anyway, here she is, photos in no particular order, and a few videos explaining things...
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, email to wb4iuy@gmail.com, or leave comments here directly on my blogs.
Sunday, August 25, 2024
Saturday, August 24, 2024
44' Sailboat Mods...
A friend with a 44' Jeanneau sailboat needed an aux USB port at the rear helm. After locating some switched 12vdc in the helm pod, I cut a hole, mounted the port, and wired it. Easy peasy!
Next, I've got to go back and trace the wiring that goes to the mast-top mounted Radar unit.
Here's a few pics...
Friday, August 16, 2024
Computer Overheat, Studio A
One of my old hamshack computers recently started shutting itself down. After a few events, I started looking around in the bios and found the processor temp was going through the roof. I unplugged everything, and hauled it out to the shop. After popping the covers, I was amazed it had not caught fire! It had more lint than the 35+KV supply in an old color tv!
I vacuumed and blew it out. I found the fan that was supposed to be attached to the processor, had a broken bracket and was laying in the bottom of the cabinet! To top it off, one of the power supplies had a bad fan, and the blower on one of the doors had a failed connector. Wow, 3 non-funcitional fans...
I all fans were repaired, and all is a well in the shack! I used a piece of balsa wood glued to the bottom of the fan as a shim. A piece of electric fence wire was ised to make a hold-down for the fan. The computer was bought back around 2003 and runs non-stop. I should probably bring the others to the shop and clean them out!
Icom IC-7800 display Repairs
This is an Icom IC-7800. I gotta say, it makes me nervous to put a $10,600 radio on my workbench and start digging in, but somebody's gotta do it :-) This one lost the display. Luckily, it has a computer SVGA port on the back, so the owner plugged a spare monitor in to keep using it. I found the problem in the switcher supply that powered a large CCFL backlight, beefed it up a little, and got it back online. This is an ultimate radio, and was a LOT of fun to play with. Alas, it had to go back home to it's owner :-( Here's a few videos and photos:



































































