[Mldxcc] [NCCC] Need help from the brain trust--Buzz/hum and broadcast radio

[Rich NU6T]

Garry, thanks.  I lose the buz/hum when I disconnect the mic from the 
radio.  I've got 4 turns through two clamp-ons on the mic line, and 
about 10 turns on the combined mic-headphone line -- which gives me a 
five inch headphone reach <grin>.  I still have the noise.  I also have 
3 turns through a clamp-on for the "phones" connector.

Rich
NU6T

On 11/14/2010 3:21 PM, Garry Shapiro wrote:
> Disconnect the audio lines between the K3 and the soundcard, and every 
> other non-essential line, until there is no hum, and work from there.
>
> On 11/14/2010 3:16 PM, Rich NU6T wrote:
>> Help!  I'm trying to get set up for SS SSB and have a buzz/hum on 40m
>> and 20m (not checked on other bands but probably there too) when I push
>> the PTT.  It is constant across the band and the volume is constant
>> regardless of the K3 RF knob position.  I hear it whether the K3 is in
>> Test mode (no RF output) or normal mode.  With the buz/hum, I hear a CNN
>> radio broadcast.  I don't hear the buz/hum or the broadcast listening to
>> RX on the K3.
>>
>> Antenna is a dipole up 57 feet.  Feed line is coax with 5 big ferrite
>> rings and 6 turns of coax (RG-213).  The coax is a complete run to the
>> radio.  I've put 2 or more ferrite clamp-ons on every wire running to
>> the radio, but not reducing the buz/hum.
>>
>> My AM/FM/SW radio shows high noise across the AM band in DX mode.  I did
>> not find that broadcast listening to the AM radio in local or DX mode.
>> (Loral Langmier and then Chris McKay shows).
>>
>> Any suggestions for resolving this will be appreciated.  If anyone is
>> available for a 40m contact, I'd like to see if this is a RX only
>> problem or an also a TX problem.
>>
>> Thanks.
>>
>> Rich
>> NU6T
>>
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