[Elecraft] Problems with K3 KXV3 IF Output Level?

[Jerry Flanders]

Fern, I am using the IF output AOK from my K3/KXV3. I am using it 
with a Clifton Labs isolation Z10000U buffer/preamp with very low 
gain into a Softrock40 With a LO of 8191 kHz with WU2X's version of 
PowerSDR as the panadaptor display, offset by 24 kHz (8215-8191). 
This with a Delta-44 sound card sampling at 96 kHz.

I would estimate that, with a 50 uV signal into the K3, the KXV3 is 
putting out something in the 20-50 uV range. Using my test oscillator 
at 1 uV output into the K3, I see an obvious peak on the panadaptor, 
so the sensitivity is OK. I haven't calibrated PowerSDR levels yet, 
but it is already near the correct S9 level on the display for 50 uV 
from my test oscillator into the K3.

Connect up another receiver to the KXV3's IF output and see if you 
don't hear sigs repeated on it when  you tune it near 8.215 MHz. If 
the K3 is hearing sigs, you should hear sigs on that second rx near 
whatever freq the K3 is tuned to, and their levels will be similar to 
what the K3 is hearing. This will tell you if your K3/KXV3 is working OK.

Keep working on it - the PowerSDR panadaptor is the best I have ever 
used in 35 years of using panadaptors.

Jerry W4UK

At 12:08 AM 7/31/2008, Fern Rivard wrote:
>Good evening Lyle:
>
>     I honestly don't know where you're getting those levels from as 
> I already reported to you back in April/08 that the levels at the I 
> F output were pretty well non existent. There is just no tracking 
> of levels at the I F out with what is fed into the antenna input of 
> the receiver. I even used a 15 db amplifier from Jack Smith of 
> Clifton Laboratories without any luck as there is simply no levels 
> to play with there. I believe that Jack Smith also queried you 
> about that without getting a proper reply as yet from you. I 
> realize that nobody is perfect but why are we dogging a proper 
> reply and/or fix for that?
>     Fern with K3  #412
>
>
>
>----- Original Message -----
>From: "Lyle Johnson" <kk7p at wavecable.com>
>To: "Don Ehrlich" <ehrlich at clallambroadband.com>
>Cc: "Elecraft Reflector" <elecraft at mailman.qth.net>
>Sent: Wednesday, July 30, 2008 9:18 PM
>Subject: Re: [Elecraft] K3 KXV3 IF Output Level?
>
>
> > The 2nd antenna input works as expected but my oscilloscope shows no
> > signal (<5 mV) coming from the IF Output on the KXV3.  What IF signal
> > level should I be seeing?
>
>It will be about the same level as at the antenna, or perhaps less,
>depending on settings of PRE, ATT, etc.
>
>73,
>
>Lyle KK7P