[Elecraft] [K2] NB2 heard a "spark gap" like signal 8k lower than the RX frequency

[Wayne Conrad]

Don,

Thank makes perfect sense.  Thanks!

73, Wayne Conrad KF7QGA

On 08/09/11 14:37, Don Wilhelm wrote:
> That depends on just how strong the off-channel signal was.
> That signal could have been strong enough to overwhelm the IF AMP on the
> KNB2 board and cause it to respond to that input - remember that the
> KNB2 sits prior to the crystal filter. If it was responding to the
> keying of the other signal, there would be gaps in the signal path.
> That effect would not be what is generally considered IMD, it would just
> be an interruption to the signal that you were trying to receive,
> because that is what a noise blanker is supposed to do - it creates
> holes in the signal.