On 6/3/2014 4:54 PM, Michael Eberle wrote:
It is adjusted as low as it will go with the carrier balance pot on
the SSB board.
I suspect a simple problem with the audio interface. Study my tutorial
on this.
http://audiosystemsgroup.com/HamInterfacing.pdf
What sounds like inadequate carrier suppression could be AC hum/buzz due
to failure to bond the chassis of the computer to the chassis of the
radio. You also need a "pad" between the computer and the mic input.
A "pad" is another name for a simple voltage divider. It takes a series
resistor plus a parallel resistor across the input of the mic. Values
are not critical, but I would start with a 10:1 ratio, with the series
resistor being the larger value. 1K ohms series and 100 ohms parallel
would work fine. So would 470 and 47. There's no power being dissipated,
so small wattage resistors work fine. Exact values are not critical, so
you can use 20%, 10% or 5%, whatever you have.
Setting levels both at the computer and at the radio are critical. Study
the tutorial for more detailed advice.
73, Jim K9YC
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
