|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
97.105.99.138
In Reply to: RE: Maybe use short threaded standoffs? posted by 91derlust on July 18, 2017 at 02:09:00
I suspect most commercial cages aren't securely earthed to the chassis. The only electrical connection might be the inner circumference of the hole where the hold-down bolt passes through, and the lockwasher on the chassis. That's iffy though, and certainly doesn't create a reliable connection. Equipment that generates RF, such as a ham radio transmitter, will often have both the cage and chassis plated, rather than painted, to ensure good contact. I've never found this treatment necessary regarding audio gear.
--------------------------
Buy Chinese. Bury freedom.
Follow Ups:
Thanks Tk.
Yea, in my case the hole where the hold down bolt passes through would be powder coated and a touch oversize - no guarantee the bolt would touch it.
I guess I was concerned about the cage becoming live, but that is very unlikely - it would need to be caused by a broken tube envelope or something external.
I'm probably being overly cautious and could probably just leave it float.
Cheers,
91.
"Confusion of goals and perfection of means seems to characterise our age." Albert Einstein
The only reason you would want it grounded would be for RF shielding, but in a audio amp, not really a big problem. If you cant ground it, you probably cannot electrify it either.
If you're using bolts, why not a star lock washer between the cage and chassis?
"It is better to remain silent and thought a fool, then speak and remove all doubt." A. Lincoln
Thanks again all.
It would be very inconvenient because I use subchassis that would obscure access to the lock washer, if used out of sight underneath the chassis.
I may have been trying to solve a "problem" that did not exist.
Cheers,
91.
"Confusion of goals and perfection of means seems to characterise our age." Albert Einstein
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: