NewMar 115-12-35AR

 This is a cool NewMar 115-12-35AR linear power supply. 35A, very over-engineered, crowbar protection, and SUPER quiet. No birdies in your radios, etc. NewMar does a lot of gov't, Aviation, Marine, RV etc stuff, and their stuff is the top of the line in power supplies, inverters, distribution, etc. 

This supply is designed to be remotely installed, and has a terminal strip on the front for remote switch, remote monitoring, and remote alarm display. 

I'll post one of my toilet paper schematics I scratched up on a piece of scrap paper. This wouldn't engage the main start relay, due to a resistor that had shot up front 2.42 k to over 10 k. The video explains it better. Here's the vid and some photos...

The dc voltage was low, so I first suspected this cap, but it was good. 

These are the two resistors in the divider. The top 2400 ohm had shot to over 10k!

The diodes was in good shape...

This is the new resistor. A little beefier, and put the coil voltage back where it should be. 

Output was great. 

This jumper is where you would normally attach a remote switch.

My toilet paper schematic :-)...

Harman Kardon 2320V

This is a pair of Harman Kardon 2320V Amplified Multimedia / Computer Speakers that needed a little repair. The volume and tone controls had gotten very noisy. They  were more difficult to disassemble, than the actual repair :-) A little shot of DeOxit, and all was well. The video covers the disassembly of the enclosure. Here's a vid and a few pics...

NVIDIA FX-5200 Maintenance

 This is an NVIDIA FX-5200 graphics video card I've had a while, great video card! I noticed, after it ran a while, especially when streaming videos and such, it would lock up. I took it apart and found the cooling fan to be seized. A little cleaning, lubrication, and refreshing the heatsink compound, and it was good as new. Here's a few pics and  videos...

Homebrew Bench Supply Resto...pt1

 This is a cool home brew bench supply I got from a friend. It was built 50ish years ago, and was pretty cool in its time. Regulation and output current is in bad condition, but I think it has potential, especially since it was built by my friend. This is the 1st part of the restoration.

Sansui 4000

 This is a beautiful Sansui 4000 I got from a friend. It was built in 1969, sports a Walnut cabinet, and pumps out a very conservative 65 watts per channel into 4 ohms. It is labeled as the Solid State 4000, considering that there were still many high end sets of that era with vacuum tubes. 

This one is very clean and works well. I've cleaned and serviced the controls and switches, and will be recapping this later. Here's a few pics and video...