Finished BUT octal tube POPS when touched/jiggled [resolved]

[Jsin]

All done - very excited. All tests “seemed” right and within range, but once hooked up (and when music plays all seems well and better than that even) but noticed that of the 6080 is touched even slightly/lightly I get a loud static-like POP through the headphones.

Something loose? Something touching that shouldn’t be? It seems all good as long as nothing touches it, but that doesn’t seem so 100% as it should.

All advice and pathways appreciated.

Josh

[Paul Birkeland]

That is a symptom of a loose connection or one that just isn't all the way soldered.  I would reheat all of your solder joints.

[Jsin]

Will do! Also - and am hoping this is a symptom of the same issue(s) but now only right channel working.....
Uggh. Thought I’d reached the mountaintop.

[Paul Birkeland]

A channel that doesn't work usually comes with voltages that are incorrect.

All of this is likely due to solder joints.

[Jsin]

I’ve got a nice little project to kick off the New Year!
Thanks for taking the time to reply!
Happy New Year.

[Jsin]

I think I’ve made matters worse. I went back in and re-soldered where it looked like it needed it and clipped and trimmed some wires that were a little long, then did the resistance test and everything checked out then did the voltage test and didn’t get the results I had hoped for. Went back to do the resistance test again hit a spark at terminal 20 and haven’t been able to get this thing to power up sense. Replaced a fuse I replaced the fuse, and no glow.

I think it was only half broken before, and now I’ve taken it all the way.

[kgoss]

Did you have it powered up when repeating the resistance tests? 

[Jsin]

No. Tubes out, unplugged.

[oguinn]

You should post some pictures of the build.

[Paul Birkeland]

Is the replacement fuse blowing?  Is it installed in the proper spot on the fuse holder? 

[Jsin]

Actually / yes / 1A fuse has blown each time - probably right when I plug in/turn on.
Just checked every solder (as best I can) and did resistance test and all numbers were good for that. Hope we can find a path to wellness here... should I post some pics?

J

[Paul Birkeland]

Yes, new pics are good.  It's likely that you have two metal leads now touching that shouldn't, and that's blowing the fuse.  A common place that this could happen would be where the UF4007 diodes are located.

[Jsin]

Here you go. Hope you see something!

[Paul Birkeland]

You need to get your solder joints much, much hotter.  Many of them have not flowed out.  If you have an adjustable solder station, crank it all the way up.  If you have a non adjustable iron, hold it onto the joints until the solder liquefies, then flows into the joints.

[Jsin]

Really? Oy. All of them? Should I/can I redo every one?
Would too cool soldering point back to the fuses blowing?