Grounding a DNA40 - 510 vs aluminium box?

[squagwallow]

I'm building a DNA40 in a hammond box, and I'm trying to find some information about grounding. I do know the DNA40 only needs 1 ground and the other connections that need ground are internally connected. I'm going to panel mount a varitube 510, but I didn't realize they had the solder terminal rings available separately when I ordered..

Can I solder the ground wire directly to the inside of the box next to the 510? Or would there be too much risk of losing connection since it's not tapped? I can't find any detailed discussion about grounding anywhere, so if you could refer me to an explanation about grounding that would be helpful too.

Also, if you think I should solder to the nut, any tips on how to get a good solder and still be able to tighten the nut? That's my main reason for not wanting to solder a ground directly to the nut.

Thanks!

 

[rhelton]

Solder to the nut, you can thread the 510 in like you would a screw. I then used a knife blade and laid it across the air channel to tighten everything down.

Soldering to the nut is easy, just scuff up one of the sides apply flux and then tin the nut with a healthy amount to get a nice little blob. Then tin your lead and use a little more flux and attach em.

 

[TheRac25]

you wont be able to solder onto aluminum (the box) very well without a special flux
could get some ring terminals at ace hardware or similar shop and bolt them to the box or they may have one that fits your 510
nut is doable but its a bit hacky, i would install the nut first before soldering to it, you may need to sand it for solder to stick

 

[rhelton]

Its not "hacky" in the least bit. It is super easy to do. You want to do it while its not in place, if you are trying to heat up the nut and the 510 it will be hacky. The 510 will act as a giant heat sink. The manufacturer suggests that you solder to the nut. I have done 3 of them it works great, you do have to scuff the surface of the nut and use flux.

Easy