[Elecraft] [ELECRAFT] {OT} Transformer to change mic impedance

[Joe Subich, W4TV]

An alternative is the FET follower that Paul, W9AC documented
for the D-104.  While the 50 to 100K dynamic elements aren't
quite as high impedance as the D-104, the FET follower should
still do a good job and a singe J201 or MPF-102 might be less
expensive than a transformer, easier to find and certainly less
sensitive to magnetic fields <G>.

See: http://72.52.250.47/images/D104.jpg

73,

    ... Joe, W4TV


On 2/25/2011 9:42 PM, Jim Brown wrote:
> On 2/25/2011 9:43 AM, David Lankshear wrote:
>> Has anyone any knowledge of a sub-miniature transformer to change
>> the impedance of a 100k dynamic mic to 600 ohms?
>
> Try it without the transformer before you decide that you need one.
> It is VERY likely that it will work just fine. Use TXEQ to adjust for
> any needed changes to frequency response, set the mic gain as
> needed.
>
> 73, Jim K9YC (audio guy)
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