[Elecraft] Strong Signals FD

[Wayne Burdick]

Hi Wilson,

The K3 looks for "reverse power" coming back into the antenna jacks in receive mode. This is possible if there's a nearby transmitter, typically when the antennas are in each other's near field. On 40 m this could happen even at 100'.

If reverse power becomes excessive, the K3 will cut off RF input to the receiver for some period of time and display the Strong Signal message. When the reverse power condition disappears, operation returns to normal.

The solution is to separate the antennas more or reduce power.

73,
Wayne
N6KR



> On Jun 29, 2022, at 10:25 AM, Wilson Lamb via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> 
> There's always something new... 
> Our clubs went to 100W  this year, after being leaders in QRP for some years, up to #2. 
> We wanted new hams and the SSB crowd to have more fun. 
> I operated CW with one of my two K3, which worked fine, as usual. 
> But I experienced something never seen before.  There was a 40m SSB station not far from me, with a dipole about 45 degrees and 100 feet away. 
> I would occasionally get "Strong Signal" on my display, accompanied by very brief interruptions to my anility to change frequency.  I'd start turning the knob and the VFO would take 200-500 mS (guess) to respond. 
> I also noticed the same thing re keying.  Sometimes the first dit or dah would be dropped when I started sending! 
> Is this normal, common?   
> It didn't cause a problem and there was no lingering effect. 
> WL 
>  
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