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DIY phono loading plugs question

What value resistor (?) would I need to create a 100 ohm phono loading plug for my cartridge? My Ayon Polaris 3 preamp uses RCA plugs for cartridge loading.  I've got some RCA plugs ready and now just need to figure out what value resistors I would need to solder into the plugs to get to 100 ohms.
wcheng2
wcheng2 OP
40 posts
 
Thanks for the responses guys.  I think the Ayon Polaris III's loading without any plugs is 47kohms so i will purchase some 100 ohm resistors to make the plugs.
chakster's avatar
chakster
6,144 posts
 
@wcheng2

The formula for parallel resistors is: R = (R1xR2) / (R1+R2). If R1 is 47K and R2 (your plug in resistor) is 100R, then multiply the two. You will get a large value. Next step, add R1 and R2. You will get a much smaller value. Now divide the larger value with the smaller value to get the final value. Pretty easy.


wcheng2 OP
40 posts
 
I purchased a pair of Vishay VAR (I think they're called "naked") resistors and put them into a pair of expensive Furutech 102R RCA plugs.  Only got to compare them for a few songs, but I'm hearing a lower noise floor compared to my old plugs.  Thanks for everyone's help
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