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In Reply to: RE: Also, how do you determine what mA rating to use? posted by rage on December 11, 2014 at 13:07:17
Hammond chokes (the clamp-mount ones) have the advantage of being cheap and readily available . The inductance tends to fall off as current increases . DCR also seems high and the cores are nothing special . The same applies to Triad . I have used both Hammond and Triad , both get the job done . You get what you pay for . I don't know what the more pricey Hammonds are like but the cores are still standard lams by the looks of things . I now get my chokes custom built in batches of at least 10 with M6 lams and over-rate by about 50% over modelled peak current . I would recommend inmates here doing the same and splitting a batch in a group buy .
Al
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I've found Hammond chokes don't carry true to their spec'd current and core saturation occurs below their current rating.
I too have gone to custom wound chokes with M6 lams....you do get what you pay for.
Hammonds are more intended for standard capacitor input usage , purely as smoothing chokes . However , I have used their 660mH 750mA (159Y?) chokes as cathode loads in an SE OTL amp and got good results .
Al
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