Model 1 Power Supply

[troj]

So...a friend and I were doing diagnostics work on my bad Expansion Interface board. Part way through, we discovered that my power supplies have both crapped out. At the same time. sigh Today I had them plugged in and in use for longer than I've run them to date, and I suspect the heat from being on that long just finally killed them due to age.

From what I've read, the most common issue is the fuse. I have no problem cutting them up, but before I go to that effort I'm wondering if I'm not better off just building a replacement supply and leaving this as-is? I've found this page on Ira's site which explains how to build a 240V power supply, and looks to also have the particulars for a US 120V version as well.

I'm assuming just building a new supply is the better long-term solution?

Edit: I went ahead and popped one of them open, and sure enough, the fuse is bad.

-Kevin

 

[ldkraemer]

Kevin,
You can try replacing the fuse, if you know for sure that there is nothing that will blow it right away. I've got a schematic of the
inner workings of that power supply. It might be a handy thing for you to have.

I have both my supplies on a power strip. I do not leave them plugged into the AC Line all the time, as they do get very warm.

Larry

 

[troj]

Yeah, I normally leave them plugged into a power strip that's turned off as I don't see a reason to pay to run transformers I'm not using.

I'll have to do some searching locally to see if I can source a new fuse. I suspect it just wore out as up until some point today, they were working just fine.

-Kevin