All I can speak from is experience. If I wire a Low Impedance Microphone to
my SB-101, HW-101, Swan MB-40, Ten Tec Corsair, Omni D or Drake TR4C the
Microphone gain must be run at a much higher level. I have an Electro-Voice
Model 638 in Low Impedance flavor. It is a Great Microphone. None of the
mentioned radio's like it. Yes, it will work but, the audio gain is Very
Low.... This is just from my experience. I have worked in the Electronics
Field since 1971. Most of that time was spent with Schematic and Soldering
Iron in hand. Never been an Engineer. I had to make what they designed work.
73 de Wade/KJ4WS
On Mon, Mar 25, 2013 at 11:48 AM, Jim Brown <k9yc@audiosystemsgroup.com>wrote:
> On 3/25/2013 9:39 AM, Wade Staggs wrote:
>
>> This was a surprise
>> to me because these are Solid State Radio's. I guess it has to do with the
>> time in history that these radio's were made. They probably wanted them to
>> work with Microphones of the Era/Day. High Impedance Microphones work Very
>> Well on them. Just a Heads Up OM.....
>>
>
> There's nothing special about solid state circuitry that affects how a
> microphone sounds or whether it will work. It's as simple as the available
> gain in the mic circuit to handle a low-Z mic, keeping the input impedance
> high enough that it doesn't cause too much loading of a high Z mic, and
> tailoring the audio response in a manner suitable for SSB communications.
>
> I'm a retired audio professional, and own a wide variety of pro mics. All
> of the dynamic mics work very well with every ham rig that I've plugged
> them into. The only thing I've had to do with most rigs is tailor their
> response by adding a low value capacitor in series to tailor their response
> to be more like a Shure 444, which is pretty close to ideal for ham radio.
>
> 73, Jim K9YC
>
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