Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-08 Thread Fred Jensen
It's always seemed to me that Poynting's Vector is the most aptly named entity in mathematics. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County Edward Mccann wrote on 4/7/2023 7:41 PM: Dave: You may have redefined Poynting’s Theorem! Ed McCann On Apr 7, 2023, at 6:23 PM, Dave New, N

Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-08 Thread a******@sbcglobal
Wait, shouldn’t the sensor be before the antenna tuner? I don’t think a sensor should be connected where it’s not 50 ohms. Al W6LX/4 > On Apr 7, 2023, at 9:22 PM, Dave New, N8SBE wrote: > > Alan, > > I tried changing the SensorCal entry, but you are correct there isn't enough > range.

Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-07 Thread Edward Mccann
Dave: You may have redefined Poynting’s Theorem! Ed McCann > On Apr 7, 2023, at 6:23 PM, Dave New, N8SBE wrote: > > Don, > > The KPA500 (and K3s) both show the correct wattage - 100W barefoot and about > 26W out of the K3s when the KPA500 is inline, and about 500W out of the > KPA500. > >

Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-07 Thread Dave New, N8SBE
Don, The KPA500 (and K3s) both show the correct wattage - 100W barefoot and about 26W out of the K3s when the KPA500 is inline, and about 500W out of the KPA500. I tried changing the P3 SensorCal value from 500 (default) to 350 (min) but that only dropped the wattage shown by a little less t

Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-07 Thread Dave New, N8SBE
Alan, I tried changing the SensorCal entry, but you are correct there isn't enough range. It only cut the reading by less than half. When I change the MtrScale entry, it changes the meter scale, but it still shows over 800W (and runs over the smaller scales) in text on the screen. I did a

Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-07 Thread Dave New, N8SBE
Dave, Yes, it is at 500 which is the default, and I've used it at the setting for the past 13 years. I tried changing it to 350 which is the minimum, and it now shows about 440W, so that seems about right for 350/500 * 873W. But it seems there isn't enough range to pull it in to 100W, so I don

Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-07 Thread Alan Bloom
Hi Dave, There is a "SensorCal" entry in the Transmit Monitor Menu, but I don't think it has enough range to correct such a large error. There is also a "MtrScale" entry to set the full-scale power on the meter display.  Does the reading change when you change the scale? In addition to the

Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-07 Thread W3FPR
Dave, What power is displayed on the KPA500?  The KPA500 would fault if indeed the K3s is putting out that much power.  The KPA500 power bar is pretty accurate, just a bit coarse in its increments. I think a power calibration is in order for the P3 power indicator. 73, Don W3FPR On 4/7/2023

Re: [Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-07 Thread Dave (NK7Z)
Have you looked at the calibration setting in it yet? Not sure if it can pull it that far, but that may be what is off. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 4/7/23 11:12,

[Elecraft] [P3] P3 woes - repaired but now claims my K3s puts out 873W!

2023-04-07 Thread Dave New, N8SBE
So, I was the guy that had a P3 display/boot problem recently. I sent it to the mother ship for repair, and they found that (get this) the 12V supply was shorted to the 3.3V supply (eep!). So, a new(er) I/O board (which contains the supplies) and a replacement blown 3.3V LCD controller later, I