Re: [Elecraft] K3 + W2
They will never be equal for two reasons: 1) The K3 measures SWR between the final amplifier output and the KAT3 input inside the K3. The function of the KAT3 is to provide a load very close to 50 ohms to the final amplifier, regardless of the impedance present at the rear-panel antenna jack and that's what the K3's SWR meter reports. The only way to get close to the same readings is to bypass the KAT3 and connect a load close to 50 ohms to the W2 output. 2) Even so, there will likely be discrepancies. SWR meters are not precision impedance-monitoring devices. There is no reason for them to be, so one meter will disagree somewhat from another meter. And, as Bill says, any transmission line between the two monitoring circuits will affect the readings unless the impedance of the load is exactly 50 ohms. The variation caused by the line is a function of the length of the line in wavelengths, so the discrepancy is larger as the frequency goes up. Ron AC7AC -Original Message- Once additional connections and coax length is introduced into a load that is not the same as the output impendence you will not see the same. I have come to accept that the results will be different in-line, unless some tuning is added to each measurement device to remove the circuit reactance created by each device. I accept the difference and use remote tuning to eliminate these issues. Bill K9YEQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dohn Smythe Sent: Sunday, February 20, 2011 11:10 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 + W2 Is there an accurate way to utilize a W2 with the K3/ATU combo? Seems that with the W2 between the output of the K3 and the Antenna, the peak reading would not be accurate. Especially at QRO power settings. I don't remember seeing anything in either of the menus that would assist with that. 73 Dohn Smythe N8EWY __ 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
Re: [Elecraft] K3 + W2
Once additional connections and coax length is introduced into a load that is not the same as the output impendence you will not see the same. I have come to accept that the results will be different in-line, unless some tuning is added to each measurement device to remove the circuit reactance created by each device. I accept the difference and use remote tuning to eliminate these issues. Bill K9YEQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dohn Smythe Sent: Sunday, February 20, 2011 11:10 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 + W2 Is there an accurate way to utilize a W2 with the K3/ATU combo? Seems that with the W2 between the output of the K3 and the Antenna, the peak reading would not be accurate. Especially at QRO power settings. I don't remember seeing anything in either of the menus that would assist with that. 73 Dohn Smythe N8EWY __ 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 __ 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
Re: [Elecraft] K3 / W2 utility conflict
Hi Mike, Sounds like a bug. I'll look into it. Tnx, David, W4SMT > Hi all, > > Some months ago, I posted[1] about an issue I had with > k3util not > functioning correctly on Linux if $HOME/Elecraft already > existed, > but $HOME/Elecraft/K3_Firmware did not. > > I've just bumped into this problem again, and lost quite a > bit of > time before remembering the previous issue. > > The problem is this: > > w2util will create $HOME/Elecraft on first run, and use it > to > store downloaded firmware. If $HOME/Elecraft already > exists, it > still works fine. > > k3util will create $HOME/Elecraft/K3_Firmware to store > downloaded > firmware. However, it $HOME/Elecraft already exists, > k3util will > silently fall back to storing downloaded files in the > current > working directory. > > Therefore, if, as I just did, you run w2util on a computer > that > you've never used k3util on, and then you run k3util on > that > system, it will confusingly download the files to > unexpected > locations. > > Would it be possible to change k3util so that it prompts > the user > for permission and then creates the required directories? > Silently falling back to the current working directory > should > certainly never happen. > > As an added bonus, how about a command-line option to allow > the > user to specify the download directory automatically? > Something > like 'k3util --download-dir="..."' would be very handy. > > > [1] http://www.mail-archive.com/elecraft@mailman.qth.net/msg76201.html > > > Thanks, > > -- > Mike, M0PRL / VP8DMH > __ > 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 > __ 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
