What size ferrite choke for RCBS CM cord

[Shawnba67]

Ive decided that adding a choke can't hurt my CHarge masters performance. But Amazon has them in 3mm and 5mm sizes. It would seem like either of these could work. The wide edge of my wire measures 3.78mm What size is best? Does a little squish help them work?
Is it apparent I'm a little lost on the matter? Thanks for any help

Secondly and less important does anyone know what the thread pitch is in the feed tube?
I'd like to make a reducer bushing for it and threading it could make removal easier? Or drive me nuts trying to do it on the lathe! Thanks

 

[T-shooter]

I bought some from eBay for my FX scale. They didn't seem to help. What did for me was these. I put 2 on the power cord and noticed an immediate improvement in stability. Fair-Rite RCT-2 Ferrite Bead. I installed them according to these instructions: http://www.oldwillknottscales.com/how-to-install-a-ferrite-bead.html

If you don't have any electrical interference they won't help.

 

[Willie]

I use the ferrite chokes also, but never got good results until I installed a line conditioner and plugged my CM and FX-120i into it. Expensive, but all problems solved ---- I hope.

 

[Just Dave]

Just plug everything into one of these,, cheap and effective,, even in my old house with missing grounds.
.
https://www.amazon.com/dp/B00009RA5Z/?tag=accuratescom-20
.

 

[nmkid]

How about a Tripp Lite 2 outlet suppressor? I got one from Amazon. Has completely done away with instability on my scale. It's a 2-outlet but, I plug only the scale into it.

 

[T-shooter]

I went the full route and probably aged a couple years trying to get my FX-300i stable enough to use. I tried an anti-vibration mat, an anti-static mat, and an anti-static wrist strap, and grounding everything to earth ground. I tried the cheap ferrite beads, even having 4 of them on the cord, then a Tripp Lite 2 outlet box. It was still too unstable most of the time with the reading floating up and down constantly. I put on 2 of the Fair-Rite RCT-2 Ferrite Beads and noticed an immediate improvement, but still had problems. The last thing was a Tripp Lite 1200 line conditioner. Since I had the other Tripp Lite outlet I experimented. The best combination for me is to plug the 2 outlet box into the line conditioner. Evidently, that provided more filtering. It's 99.9% stable now. Even when the line conditioner shows low voltage, the scale rarely fluctuates. All this was due to electrical problems in the house.

If your scale will run off battery power, that would eliminate electrical supply issues. Also, most electronic scales must be perfectly level and up to operating temperature. They also need a stable environment, no vibration, no air movement, and no big changes in temperature or air pressure.

 

[Webster]

Ive decided that adding a choke can't hurt my CHarge masters performance. But Amazon has them in 3mm and 5mm sizes. It would seem like either of these could work. The wide edge of my wire measures 3.78mm What size is best? Does a little squish help them work?
Is it apparent I'm a little lost on the matter? Thanks for any help

Secondly and less important does anyone know what the thread pitch is in the feed tube?
I'd like to make a reducer bushing for it and threading it could make removal easier? Or drive me nuts trying to do it on the lathe! Thanks

One of our electronics people can comment on this but as I remember the ferrite choke has to go around one wire. Don't remember if the have to match the problem frequency. I believe they come in values of micro-henries.

 

[Homerange]

One of our electronics people can comment on this but as I remember the ferrite choke has to go around one wire. Don't remember if the have to match the problem frequency. I believe they come in values of micro-henries.

Correct.
I used a toroidal core I had on hand, you want one large enough to pass the power lead barrel connector through a few times for at least 6 turns.
The one I used was nothing special, just a iron powder type but other ferrite types will give better reactance.
Something with ~1+" inside will do the job and many from this list would do the job.
https://www.digikey.co.nz/products/...t=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25

 

[DDRanch]

We live out in the sticks so. When we first moved out here it took like an hour for my scale to settle in, and even than would start drifting. Bought the APC line voltage regulator and all the problems went away.