Dynamic Mic Noise
PStamler wrote:
The Beta58 is alive and well, now called the Beta 58A.
** Not true.
The Beta58 was Shure's first attempt to modernise & upgrade the venerable SM58.
Among several other changes, the Beta58 featured a hum bucking coil and eliminated the transformer in the handle by using a higher impedance diaphragm coil - 250ohm instead of circa 13ohm, which allowed direct output.
It remained on sale for a short time in the early 1990s, before being withdrawn and replaced with the Beta58A in which the hum bucking coil was removed but strangely the transformer returned along with a circa 20ohm diaphragm.
..... Phil
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