Thanks Steveu, it worked!!

Those don't look like gold bullets to me Bob.  If you are going to use a gold scale...........

Jack

At over $2600 an ounce for gold this sport could be an expensive sport. Even those silver bullets needed for werewolf protection are getting expensive.

rkaires wrote on Jan 12^th, 2025 at 5:52am:


The chokes I've seen are just a donut you wrap your cord through a few times and nothing more. Internally these are just a coil wound with a lot of very tiny gauge copper wire around an iron core. You can choose how many wraps you do depending on how long your cord is.

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Bob,

Marlinguy's link is an example of the most common method to make a choke.  An easier technique is to tape or epoxy in place a few wraps of the power cord around a 1.5" to 2" bar magnet which is what I did.  The chokes on my scales are gray-covered lumps so the following photo is not much good.  Here's a link to a site that details other examples. (You need to Login or Register to view media files and links).

Wayne

texasmac wrote on Jan 12^th, 2025 at 11:45am:



Great! Thanks Wayne & Vall,

Bob

Here’s a “laymen’s” description of how a choke works.  

Weight scales can be sensitive to any fluctuations is the DC power supply.  The fluctuations may be induced into the line by high frequency AC sources nearby such as fluorescent lights, RF etc.  A chokes main function is to provide resistance to the AC while, at the same time, allowing DC to pass.  Hence the reason to place the choke within a few inches of the scale.  A choke coil works by the principle of self-induction.  The electrical field “induced” by wrapping the power cord around the ferrite core creates a magnetic field that resists the AC but allows the DC to pass.  By using short bar magnets, I used the existing magnetic field to make smaller simpler coils for my scales.

Wayne