It a K3S. I’m about to order Clifton Labs Z10000C kit from DX Engineering. Any better ideas are welcome:
On Fri, Oct 4, 2019 at 8:27 PM Don Wilhelm <donw...@embarqmail.com> wrote: > Fred, > > Is that "K3S" or multiple "K3"s? > All The K3S have the mod, as well as later K3s. If an early K3, then > you may need the mod. > > 73, > Don W3FPR > > On 10/4/2019 8:59 PM, Fred Massey wrote: > > I knew I had an issue when I could hear signals on the K3s that weren’t > > showing on the waterfall. > > > > I need to engage Elecraft tech support to see if I need the mod for my > K3s, > > and see what they say about using an external buffer amp or preamp. > > > > When I posted, I thought this might be a common problem that others had > > fixed before. > > > > > > On Fri, Oct 4, 2019 at 6:59 PM Bob McGraw K4TAX <rmcg...@blomand.net> > wrote: > > > >> I read that folks have successfully used the Clifton buffer amp. > >> Certainly worth a try. Others have indicated only about 6 dB of gain > is > >> needed. > >> > >> The software I use for my RSP-1 allows RF Gain changes. Thus with the > >> lower IF output of my K3S, I just raise the gain of the RSP-1 via the > >> software. I've never considered the SDR receivers of that type to be > very > >> precise with regard to "calibration". Although some seem to think > they > >> can split hairs on a mosquito with the level and frequency accuracy of > the > >> receivers. I do not consider them of instrumentation quality, thus > >> anything +/-10 dB is deemed satisfactory. Likewise the same with > frequency > >> accuracy. Others may have different experiences with different > receivers. > >> > >> 73 > >> > >> Bob, K4TAX > >> > >> > >> On 10/4/2019 6:34 PM, Fred Massey wrote: > >> > >> A friend of mine, Tim AB4B, suggested that I might need a buffer amp to > >> keep the IF being pulled down by the sdr. DXEngineering sells the > Clifton > >> Z10000. That adds about 6db of gain, but maybe the buffering that it > does > >> has an even bigger effect. > >> > >> On Fri, Oct 4, 2019 at 2:18 PM Bob McGraw K4TAX <rmcg...@blomand.net> > >> wrote: > >> > >>> In a word, YES. I find that to be true with my K3S as well as other > >>> brands/models of radios. Thus you'll need about 20 dB of gain in the > >>> form of a preamp between the IF output and the QSR receiver. > >>> > >>> 73 > >>> > >>> Bob, K4TAX > >>> > >>> > >>> On 10/4/2019 12:57 PM, Fred Massey wrote: > >>>> 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 <donw...@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_n...@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 > >>>>>>> ______________________________________________________________ > >>>>>>> Elecraft mailing list > >>>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >>>>>>> Help: http://mailman.qth.net/mmfaq.htm > >>>>>>> Post: mailto:Elecraft@mailman.qth.net > >>>>>>> > >>>>>>> This list hosted by: http://www.qsl.net > >>>>>>> Please help support this email list: > http://www.qsl.net/donate.html > >>>>>>> Message delivered to fhmas...@gmail.com > >>>>>> ______________________________________________________________ > >>>>>> Elecraft mailing list > >>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >>>>>> Help: http://mailman.qth.net/mmfaq.htm > >>>>>> Post: mailto:Elecraft@mailman.qth.net > >>>>>> > >>>>>> This list hosted by: http://www.qsl.net > >>>>>> Please help support this email list: http://www.qsl.net/donate.html > >>>>>> Message delivered to donw...@embarqmail.com > >>>>>> > >>>> ______________________________________________________________ > >>>> Elecraft mailing list > >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >>>> Help: http://mailman.qth.net/mmfaq.htm > >>>> Post: mailto:Elecraft@mailman.qth.net > >>>> > >>>> This list hosted by: http://www.qsl.net > >>>> Please help support this email list: http://www.qsl.net/donate.html > >>>> Message delivered to rmcg...@blomand.net > >>> > >>> ______________________________________________________________ > >>> Elecraft mailing list > >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >>> Help: http://mailman.qth.net/mmfaq.htm > >>> Post: mailto:Elecraft@mailman.qth.net > >>> > >>> This list hosted by: http://www.qsl.net > >>> Please help support this email list: http://www.qsl.net/donate.html > >>> Message delivered to fhmas...@gmail.com > >> > >> > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to donw...@embarqmail.com > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
