SB-101 Mike Jack

[Robert P. Okas]

Hi David,

    If you look closely at the front of the connector, you'll see the pin
numbers on the black pin housing. The pin on the right is pin 1 and is the
mic audio input. Obviously, the left pin is number 2 and is the PTT line.

    The SB-101 input is hi-z. An unamplified D-104 crystal element wants
to "see" several megohms of load resistance for a full-bodied sound. Loads
less than a meg will attenuate the low frequencies and reduce the level.
Check your schematic to determine if there is a high enough resistance at
the mic jack. An amplified D-104 should have no problem, just keep the
gain low to prevent overload of the mic preamp.

73,
Bob - W3CD



On Mon, 1 Oct 2001, David Rogovitz wrote:

> Hi Guys,
>               I have an SB-101 tat works great but I'm at a loss trying
> to determine on the schematic which pin is which on the two pin mike
> jack??? Also,  how well will my D-104 mike drive the SB-101 ?
>
> 73 de David,
> aa2dw,
> aa2dw at amsat.org
>
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