Mic Configuration Question Part II

[Gottlieb, Jonathan]

Thanks to everyone for the suggestions.  I have confirmed that the mic
is wired as per the MH2, including the resistor between pins 1&6.  I
have done all of the KSB2 alignments as far I can.  I still get a >10
watt carrier when I push the PTT in LSB and USB.  In CW when I push the
PTT,  I am getting 2 watts as per the setting.  Interestingly, when I am
getting the carrier of >10 watts (as measured on a Waters dummy
load/watt meter), the K2 display does not show that I am transmitting.
With the mic connected but using Tune, I am getting proper output and K2
display reading. Same with the mic not connected.   Something is very
not right here.  Any thoughts?
 
Jonathan Gottlieb
WA3WDK







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[Don Wilhelm-3]

Jonathan,

As I indicated yesterday, I tend to believe that the wiring on your mic
cable may not be what you think it is.

Look at the end of the mic plug for the pin numbers - then check continuity
between pins 2 and 7 (or 2 and 8) with the PTT open, and then with it
closed.  You should see an open circuit with the PTT not operated and zero
ohms with the PTT depressed.  If you do not see that indication, for
certain, the mic cable is not wired for Elecraft (or Kenwood).

I can't help as readily on the AF connections because there is no
open/closed circuit to measure, so the way I would do it is to open the mic
body physically somewhere that will give you access to the connections to
the mic element - then measure the connection to the mic plug pin - if it
ends up on pin 1 that is correct for the Elecraft or kenwood configuration.
Sorry, but I don't know of an easier way to verify the mic cable wiring.

One thing that you may want to try is to put the K2 in SSB mode with no mic
connected and close the dot paddle - that is the same thing as pressing the
PTT switch - if you get 10 watts out, you have some problem in the K2 and
not in the mic, but if you find no output (since you have no audio), the K2
is good and you should continue looking for the problem in the mic and its
connections.

73,
Don W3FPR

> -----Original Message-----

>
> Thanks to everyone for the suggestions.  I have confirmed that the mic
> is wired as per the MH2, including the resistor between pins 1&6.  I
> have done all of the KSB2 alignments as far I can.  I still get a >10
> watt carrier when I push the PTT in LSB and USB.  In CW when I push the
> PTT,  I am getting 2 watts as per the setting.  Interestingly, when I am
> getting the carrier of >10 watts (as measured on a Waters dummy
> load/watt meter), the K2 display does not show that I am transmitting.
> With the mic connected but using Tune, I am getting proper output and K2
> display reading. Same with the mic not connected.   Something is very
> not right here.  Any thoughts?
>
> Jonathan Gottlieb
> WA3WDK
>

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