Even if the bias does not saturate the coil and cause distortion, it *will* reduce the output (sensitivity). A dynamic mic typically has
a very low (< 5 mV) output level any reduction in output level is to be
avoided.

73,

   ... Joe, W4TV


On 11/5/2015 1:11 AM, Jim Brown wrote:
On Wed,11/4/2015 6:39 PM, Bob McGraw - K4TAX wrote:
Yes, with any dynamic mike being used, set the bias to the off position

Don Wilhelm says that some dynamic mics sold to hams DO get distorted
with bias applied. Whether it's a poor mic or a saturated transformer,
it's clearly better to turn off bias when using a ham dynamic mic.

73, Jim K9YC
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