Vintage: Need Help with Heathkit SB-221

[ScubaJungle]

I got a Heathkit SB-221 from an estate sale, mostly as a project to learn with, but I cant get it to turn on.


I've done a lot of testing and everything, but no luck.

-Step-Start board
-Soft-key Board
-new HV rectifier board
-re-soldered some cold/iffy joints

-I've tested capacitance on the filter caps - I get between 458-510uf on each set.
-Ive tested the voltage at different points - 120vac is present on the power switch terminals, but doesnt seem to be making it to the upper half of the amp (transformer issue?)
-No voltage is making it to the upper portion of the amp (lamps, HV rectifier board, etc)
-Ive tested continuity between major points, and the chassis seems to be okay, although I'm not sure how to test the transformer, which Im kind of suspecting is the issue at this point

My thinking is, there's a possible issue with the transformer - but I could use an experienced mind, or if someone is in the area and would check it out, that would be awesome as well.

 

[prcguy]

Is it wired for 220v? You can test the transformer to some extent with an ohm meter. The primary's should be reasonably low, maybe a few ohms and the secondary higher, maybe up to 20 ohms or so.

 

[ScubaJungle]

Is it wired for 220v? You can test the transformer to some extent with an ohm meter. The primary's should be reasonably low, maybe a few ohms and the secondary higher, maybe up to 20 ohms or so.

It was, but I changed it to 120v since I'm renting currently and don't have a 240v outlet in my office/shack. According to the manual, it's just a simple switching of the jumpers on the terminal strip from 2-3 for 240v, to 1-2 and 3-4 for 120v, unless there's more to it that I didn't do or missed. I figured 240v vs 120v wouldn't make much of a difference for testing purposes, to see if it works, and I could always run a line later if necessary for use, unless you think I should use 240v.
I'll see if I can test the resistance on them, I haven't touched/moved the transformers yet, since I wasn't sure if that was the actual issue. They're the large, original transformers.