[Elecraft] AGC behaviour redux

[Monty Shultes]

I solved the problem originally described below by installing a PCI Express serial port card in my PC.  They are expensive, but all the noise is gone.  (PC has No PCI slots)  Thanks to all who responded.

Monty K2DLJ

>I have very high white noise in my K3 on 75 meters when connected to the 
>serial port computer interface. Removing this connection greatly reduces the 
>noise.  If you use HRD, LP-BRIDGE, or any control software, you can also 
>hear a pulsing noise related to polling the K3 over the serial port.  I 
>believe this can be lessened, but have not tried as yet.  Here in Florida, 
>USA, the level of thunder storms creates a naturally high noise level in the 
>summer, but the effects described above are clearly noticeable.  I use the 
>Elecraft KUSB as serial interface.
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