What do you use for Preamp grounding posts?

[nj pheonix]

I've noticed some older preamps (perhaps integrateds or receivers ) don't come with grounding posts (terminals?) for Turntable inputs. I suspect many here add them . I was perusing the usual sources and not having a ton of luck finding pieces that look like they came on gear in the first place. Any suggestions for sources (pieces)? I have just considered using a speaker binding post but it doesn't look quite right. I have also seen some used harvested pieces on epray which would work. I did think somebody sold these (Mouser, Digikey, AES,...)

 

[gadget73]

longer machine screw with two nuts. On the back of my PAS, one of the screws holding the input jacks in has been replaced with a same size but longer screw coming from the inside. Nut holds the jacks tight, two flat washers and a second nut holds the turntable ground. Not fancy but it gets the job done. If you want it to look a little nicer, you can get thumb nuts from someplace like McMaster and use the same basic idea. If the metal is thick enough to tap, a thumbscrew would do it too but most panels are pretty light gauge and probably wouldn't stand it unless you used something like a rivet nut to give it some bite.

 

[nj pheonix]

Thanks for the idea. It is in fact for a pas3.

 

[Blue Shadow]

This has about doubled in price since April 2013: http://www.mouser.com/ProductDetail...AKGcOa4AmqyqdkXAAMTkKjySBnRKxg1ehNXvIU8iE5w==

 

[ConradH]

#6-32 screw from the inside of the chassis, with a standard nut on the outside to hold it, followed by a knurled nut. Google "knurled nut" and you can probably even get them at Home Depot.

 

[arts]

#6-32 screw from the inside of the chassis, with a standard nut on the outside to hold it, followed by a knurled nut. Google "knurled nut" and you can probably even get them at Home Depot.

Yessir,use them all the time:

https://www.homedepot.ca/en/home/p.6-32-brass-knurled-nut.1000129083.html

 

[Blue Shadow]

#6-32 screw from the inside of the chassis, with a standard nut on the outside to hold it, followed by a knurled nut. Google "knurled nut" and you can probably even get them at Home Depot.

Don't know the bolt specifics but that knurled nut after the standard nut is how ARC did the ground connection for the SP-3 series preamps...on the opposite side of the preamp from the phono inputs, using a transformer mounting bolt. Easy to find a pic of it on the web.

 

[nj pheonix]

Great answers all.
I'm a little surprised i didn't run across the Mouser thing though sometimes its tough to pick the right category and they carry a lot of stuff. I don't think i'm up for a 6$ shipping on a 4 dollar item. If i remember i'll order a couple in my next order . They'd be nice to have in the parts box.

 

[knockbill]

I use a brass bolt, a couple nuts, a serrated washer, and a brass knurl nut,,, the knurl nuts are on a lot of old toy train transformers and accessories,,, most are available for really short money...
Guess I'm just combining hobbies!!!!