[Elecraft] Microphone question - K3
NZ0T
NZ0T at cox.net
Mon Dec 22 08:31:27 EST 2008
Forgive me for being dense about this! The RS element has a red wire that is
the V+ for the element. The other wire is the shielded audio output wire.
Because the K# has switchable voltage available at pin 1 and from what Lyle
posted I assume a coupling capacitor (which allows both V+ and audio to
coexist?) in that line my understanding was that the red V+ wire and the
audio output wire both go to pin 1 and the shield to pin 7. If I connect
the audio output to pin 1 and the shield to pin 7 where do I connect the red
V+ wire to get the voltage needed to power the element?
Don Wilhelm-4 wrote:
>
> Are you saying that you connected 2 wires to pin 1? There normally
> should only be one wire to pin 1, and that is the AF line which should
> connect the other end direct to the + side of the electret element. The
> other side of the electret element must connect to ground (pin 7 or pin
> 8).
> Turn bias ON in the FP mic menu and likely with an electret, you can use
> the L setting. In other words, the MIC SEL menu parameter should be
> FP.L bIAS.
>
> 73,
> Don W3FPR
>
> NZ0T wrote:
>> I tried a RS electret element I have here and the audio is distorted and
>> weak
>> - do I have a bad element or am I doing something wrong? I wired the
>> element directly to the mic wires bypassing the transformer in the mic
>> with
>> no cap or resistor. The red wire and audio to pin 1 and the ground to
>> pin
>> 7. Guess I'm clueless when it comes to electret mics!
>>
>>
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