[Elecraft] PX3: Possible problem with display

[Larry Naumann]

Don
  Thanks for the suggestion but that does not fix/improve the situation. 
Looking at it further I also have spikes at roughly 23, 30 and 52Khz 
above and below my cursor. The 52 Khz signal is at S4 the other two are 
about S2. I can turn on the PX3 and look at the display with no antenna 
connected and see these spikes on every band. If I disconnect the cables 
to the KX3 the signals are still there but go down to S1 in strength. I 
have even tried running both on separate battery supplies but the 
problem is the same. The spikes are there even if I disconnect the I/Q 
cable but the spikes are very small, as soon as the I/Q cable is plugged 
in the spikes increase.
Larry
n0sa
On 9/9/2016 9:22 AM, Don Wilhelm wrote:
> Larry,
>
> I suspect hum, buzz, and noise pickup on the RX I/Q cable shield 
> between the KX3 and the PX3.
> Try "Bonding" - run a heavy wire or strap between the KX3 and the PX3 
> in parallel with the RX I/Q cable.  The shield from old RG-8 coax 
> works well.
>
> 73,
> Don W3FPR
>
> On 9/9/2016 10:12 AM, Larry Naumann wrote:
>> I have just recently noticed that there is a continual spike that 
>> follows my cursor. It is internally generated. In CW mode it is away 
>> from my tuned signal by the amount of my CW side tone setting and can 
>> be switched to above or below the cursor depending on if I am in CW 
>> or CW-R.
>> These spikes occur with no antenna connected and are S4 to S5 in 
>> strength depending on band.
>> I did the Opposite Sideband Rejection adjustment but show no 
>> improvement.
>>   I think something is either set wrong or I have an issue.
>> Any help or ideas are appreciated.
>>
>
>