[Elecraft] K3: Receiver recovery time

[Dave Cole (NK7Z)]

Hi Don,

Thanks for the combined brain power!  I have a plan for testing if it 
ever gets that far.  I am just trying to see if the K3 receiver recovers 
sufficiently fast in a general sort of way first.

I believe I could look at RF levels on the IF while transmitting, (using 
a different transmitter and a storage scope to look at the K3 IF), then 
just drop the carrier while still looking at the levels with that scope. 
  When I see signals return to the IF I have the recovery time of the 
receiver.

I am just trying to skip that step hoping someone actually knows the 
recovery time of the receiver, as opposed to actual testing.

If the K3 is even close, I will set up test jig for it, if not, then 
I'll look for a better way.

Thanks again for your thoughts here!

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 11:53 AM, Don Wilhelm wrote:
> Dave,
> 
> I am trying to think of how you might test it.
> The best I can think of is to listen to both a noise source and an XG3 
> sending a CW string of dots.  Increase the speed of the CW sent by the 
> XG3 until you can no longer hear the noise source between dits.
> Then either calculate the off times for the dits or measure it on an 
> oscilloscope.
> 
> 73,
> Don W3FPR
> 
> On 1/13/2019 2:07 PM, Dave Cole (NK7Z) wrote:
>> 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.