[Elecraft] preamp for using an SDR as a pan adapter

[Fred Massey]

Some.  I was planning on sending an email to Elecraft support with the s/n
of my K3s to see if I needed the mod.  The difference I’m seeing in signal
strength is about 20+ dB.  Is it normal for the if-out to be weaker than a
direct connection to the antenna?
73,
Fred
AE4ED

On Fri, Oct 4, 2019 at 12:44 PM Don Wilhelm <donwilh at embarqmail.com> wrote:

> Fred,
>
> Have you looked the K3 IF Output mod?
>
> https://ftp.elecraft.com/K3/Mod%20Notes%20Alerts/IF_Output_Buffer_Gain_Mod_Rev_A.pdf
>
> If you don't have the 13k SMD resistor or a 1/8 watt 13k resistor, you
> can order the kit from Elecraft.
>
> 73,
> Don W3FPR
>
> On 10/4/2019 1:24 PM, Fred Massey wrote:
> > Good afternoon Wes and all,
> >
> > If I connect the antenna directly to the QSR-1, I get the same signal
> level
> > as the K3s.  But, when I connect to the QSR-1 to the IF-out, the signal
> is
> > about 4 s-units less.
> >
> > Any ideas...anyone?
> >
> > Fred
> >
> > On Thu, Oct 3, 2019 at 4:14 PM Wes <wes_n7ws at triconet.org> wrote:
> >
> >> I use an SDR-IQ on the i-f output on my (very) early K3S.  it works
> fine.
> >> IIRC,
> >> always a dubious proposition, I did the mod on my original K3 and it
> >> worked well
> >> too without any additional amplification.  I think you have another
> >> problem.
> >>
> >> Wes  N7WS
> >>
> >> On 10/3/2019 2:01 PM, Fred Massey wrote:
> >>> Good afternoon,
> >>>
> >>> I have successfully connected my QSR-1 to my K3s if-out, and
> immediately
> >>> noticed the signal strengths showing on the QSR-1 were much weaker.  I
> >>> probably have an early K3s, so the if-out signal strength is even
> weaker.
> >>>
> >>> Any recommendations at a good preamp to use?  It seems like 20db is
> what
> >> I
> >>> need:
> >>>
> >>> 73,
> >>> Fred
> >>> AE4ED
> >>
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