[Elecraft] K3: Receiver recovery time

[Dave Cole (NK7Z)]

Hi again Scott,

Thank you for your answer, but I am not being clear.

Not during break in, just sitting there in receive...  If the radio is 
hit with an S9+ signal, how long after the S9+ signal terminates before 
the K3 receiver recovers enough to show an weak signal on the IF...  No 
T/R happening, just sitting there in receive.

You are close to what I am looking for...  I am investigating the 
possibility of using the K3 as the receiver portion in a homebrew 
bistatic radar setup running in the HF spectrum.

73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 1/13/19 10:25 AM, K9MA wrote:
> On 1/13/2019 12:10, Dave Cole (NK7Z) wrote:
>> Is it faster than .0001 ms?
> 
> Certainly not. I'm not sure whether it is recovery time or latency, but 
> in full break-in mode, you hear nothing between the dits above something 
> like 10 wpm. (Even with AGC off.) With other non-DSP receivers, one can 
> hear between the dits up to at least 30 wpm with fast AGC. Perhaps it's 
> just the price we pay for the power of DSP.
> 
> Many years ago, when there were sunspots, I recall hearing multiple 
> echos on 15 meters. I timed them, and the time interval was about 133 
> ms, just about the time it takes radio waves to circumnavigate the 
> earth. I heard them go around at least twice, and that was receiving off 
> the back of a beam. Talk about long path! That would not have been 
> possible with a DSP receiver.
> 
> 73,
> 
> Scott K9MA
>