Re: [Elecraft] A question on the P3 or actually the Tx Mon (K3)
Hi Paul, It's just a matter of adjusting the SensorCal menu setting until the power reads the same as the device used for the calibration. Of course, that assumes the calibration device is more accurate than the P3. :=) The nominal calibration value is 500. The intent was to make it correspond to the same value as in a W2, but the match is not perfect. For one thing, the P3 uses a more-sophisticated algorithm to match the diode detector nonlinearity than the W2. Alan N1AL On 03/06/2017 08:56 AM, paul ecker via Elecraft wrote: Alan - is there any documentation available on the procedure for calibrating the Tx Monitor? 73Paul __ 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 n...@sonic.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 arch...@mail-archive.com
[Elecraft] A question on the P3 or actually the Tx Mon (K3)
Alan - is there any documentation available on the procedure for calibrating the Tx Monitor? 73Paul __ 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
Re: [Elecraft] A question on the P3 or actually the Tx Mon (K3)
Yes, it can be calibrated in a manner similar to the W2. The menu entry is TXMonMenu/SensorCal. There is a separate calibration stored for each sensor type (200W/2000W, HF/VHF). Alan N1AL On 03/06/2017 08:26 AM, paul ecker via Elecraft wrote: A related question on this subject concerning the Tx Monitor. In terms of Power & SWR readings, can the Transmit Monitor be calibrated ? Or have other users found no need to adjust readings right out of the box? Reviewing the P3 manual on pages 34-35 there isn't much said about this subject. 73Paulkc2nyu __ 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 n...@sonic.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 arch...@mail-archive.com
[Elecraft] A question on the P3 or actually the Tx Mon (K3)
A related question on this subject concerning the Tx Monitor. In terms of Power & SWR readings, can the Transmit Monitor be calibrated ? Or have other users found no need to adjust readings right out of the box? Reviewing the P3 manual on pages 34-35 there isn't much said about this subject. 73Paulkc2nyu __ 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
Re: [Elecraft] A question on the P3 or actually the Tx Mon
This is one of my pet peeves with the W2 -- it does not have an option for delivered power. Yes, I know how to subtract, but it's beyond trivial to do this in the software, and it would be convenient. Vic 4X6GP > On 6 Mar 2017, at 05:32, Alan Bloom wrote: > > The P3 shows total forward power. The power delivered to the feedline is > forward minus reflected. > > With a 13:1 SWR, 73.5% of the power is reflected and 26.5% is transmitted. > If the transmitted power is 92 watts then the total forward power should be > 347 watts. > > Alan N1AL > > >> On 03/05/2017 06:58 PM, Grady Harper via Elecraft wrote: >> I placed the DCHF-200 after my antenna tuner. In other words, the >> DCHF-200 is between my tuner and antenna. When relying on my tuner >> to match the antenna to the radio My power meter (on the P3) is >> showing an SWR of a little over 13:1 (which is about right) . My >> meter on my tuner is showing about 92 watts of power headed down the >> antenna,but the meter on the P3 is showing over 200 watts. My >> intended output being 100 watts. Does the DCHF-200 show out-going >> pwr + reflected pwr? The tuner matches the antenna to the radio, and >> the tuner meter shows a very very small amt. of reflected power. I >> put the DCHF-200 at this location, because if I had the tuner >> installed in the radio, this is where it would go. >> >> The antenna is a fan dipole trimmed for 40 meters and 20 meters. I >> am on 3.810 MHz and without the tuner the SWR is about 13.2:1 here. >> The tuner matches the antenna to the radio with a SWR of very close >> to 1.0:1. . >> >> AJ4YA Grady >> >> Thanks. >> >> Sent from my iPad >> __ >> 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 >> n...@sonic.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 k2vco@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 arch...@mail-archive.com
Re: [Elecraft] A question on the P3 or actually the Tx Mon
The P3 shows total forward power. The power delivered to the feedline is forward minus reflected. With a 13:1 SWR, 73.5% of the power is reflected and 26.5% is transmitted. If the transmitted power is 92 watts then the total forward power should be 347 watts. Alan N1AL On 03/05/2017 06:58 PM, Grady Harper via Elecraft wrote: I placed the DCHF-200 after my antenna tuner. In other words, the DCHF-200 is between my tuner and antenna. When relying on my tuner to match the antenna to the radio My power meter (on the P3) is showing an SWR of a little over 13:1 (which is about right) . My meter on my tuner is showing about 92 watts of power headed down the antenna,but the meter on the P3 is showing over 200 watts. My intended output being 100 watts. Does the DCHF-200 show out-going pwr + reflected pwr? The tuner matches the antenna to the radio, and the tuner meter shows a very very small amt. of reflected power. I put the DCHF-200 at this location, because if I had the tuner installed in the radio, this is where it would go. The antenna is a fan dipole trimmed for 40 meters and 20 meters. I am on 3.810 MHz and without the tuner the SWR is about 13.2:1 here. The tuner matches the antenna to the radio with a SWR of very close to 1.0:1. . AJ4YA Grady Thanks. Sent from my iPad __ 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 n...@sonic.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 arch...@mail-archive.com
[Elecraft] A question on the P3 or actually the Tx Mon
I placed the DCHF-200 after my antenna tuner. In other words, the DCHF-200 is between my tuner and antenna. When relying on my tuner to match the antenna to the radio My power meter (on the P3) is showing an SWR of a little over 13:1 (which is about right) . My meter on my tuner is showing about 92 watts of power headed down the antenna,but the meter on the P3 is showing over 200 watts. My intended output being 100 watts. Does the DCHF-200 show out-going pwr + reflected pwr? The tuner matches the antenna to the radio, and the tuner meter shows a very very small amt. of reflected power. I put the DCHF-200 at this location, because if I had the tuner installed in the radio, this is where it would go. The antenna is a fan dipole trimmed for 40 meters and 20 meters. I am on 3.810 MHz and without the tuner the SWR is about 13.2:1 here. The tuner matches the antenna to the radio with a SWR of very close to 1.0:1. . AJ4YA Grady Thanks. Sent from my iPad __ 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
