I have some chokes that I got from a sale and donot know what value they are is there a way to id these chokes so I can use them? Thanks Jimbo
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Choke Identification
- Thread starter Jimbo165
- Start date
The most direct way to measure them would be with an LC or LCR meter. Lots of them available for under a hundred bucks.
You could also parallel a choke with a known, good, stable capacitor and use a grid dip meter (or something similar) to measure the resonant frequency of the circuit. Then determine the value of capacitive reactance (you already know the capacitance), and then calculate the amount of inductance that will provide the same value of inductive reactance.
I used the latter method LONG before LCR meters were available at reasonable prices. And with a slide rule!:blink::blink:
You could also parallel a choke with a known, good, stable capacitor and use a grid dip meter (or something similar) to measure the resonant frequency of the circuit. Then determine the value of capacitive reactance (you already know the capacitance), and then calculate the amount of inductance that will provide the same value of inductive reactance.
I used the latter method LONG before LCR meters were available at reasonable prices. And with a slide rule!:blink::blink:
Chokes
Thanks I think I will go the LCR way I see I can buy one for 35 dollars on Ebay and I have way to many to do it the other way. Thank You Jimbo165
Thanks I think I will go the LCR way I see I can buy one for 35 dollars on Ebay and I have way to many to do it the other way. Thank You Jimbo165
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@ Geoexplorer69:Coax question. I just put up a new Sirio monsoon base antenna with 100’ of rg8u coax testing with myMFJ antenna analyzer shows 1.4 swr at 26.965mhz and a 1.1 at 27.405 mhz . When I checked the ohms it’s steady a 30 ohms across the entire bandwidth.
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