Hi, Exactly 100 watts set on K3. Measured about 90 watts out on two external watt meters. One on an MFJ antenna tuner and the other is a high end MFJ power meter. They agree within a couple of watts near 100 watts measured.
Have a good day and 73. Jim, W0EM > From: w...@w5ov.com > To: w...@q.com; elecraft@mailman.qth.net; g...@elecraft.com > Subject: RE: [Elecraft] K3 Power Problem ?? > Date: Fri, 4 Dec 2009 21:51:35 -0600 > > Jim, > > 23 to 24 amps on transmit? The manual says you should have 17 to 22. At 14v > it sure sounds like you're running a lot more than 100w out. > > How are you measuring the output? > > W5OV > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Harris > Sent: Friday, December 04, 2009 7:46 PM > To: Elecraft Email; Gary Elecraft > Subject: [Elecraft] K3 Power Problem ?? > > > Hi Folks, > > When doing RTTY at 100 watts a high current warning flashes in the VFO B > display area and RF power is automatically cut back to about 60 watts. SWR > is about 1.1:1 or there abouts; nothing approaching 1.5:1. I have found > there is 0.6 volts drop in the Elecraft supplied power cable (Power Poles > are soldered) and about 0.2 volt drop between my power supply and the output > of the Rigrunner. It's between the power supply and the K3. Voltage at the > radio drops to 13.2 vdc and current is 23-24 amps on transmit. Under that > load the voltage at the power supply drops 0.01 volts. I run the power > supply (it's variable) at 14.0 volts at the supply. It's a 40 amp power > supply. I have a popular off shore rig that has no problem with the > existing power setup. > > In reading the Supply/Voltage Current specifications on page eight (8) of > the Owners Manual I find it recommends "When using reduced supply voltage > (<12volts), power output should be reduced (e.g. 70 W at 11 V). Further, > "For best results, use the supplied 5 foot (1.3 m) power cable." Those two > statements appear to be in error when applied to my radio. > > My K3 appears to be overly sensitive to voltage and current. The only > adjustment I can locate that might relate to this is the menu CONFIG:ADC REF > entry. However, I seriously doubt it will have any impact on this as this > appears to be a serious error and adjust appears to be for fine tuning at > best. > > I certainly would appreciate any ones constructive input on this situation. > I could appreciate knowing the gauge of the supplied cable....I'm hoping > that doubling or tripling the size might help. But, that seems to be a > bandaide rather that eliminating the root cause. > > Thank, have a good day and 73. > > Jim, W0EM > > > > ______________________________________________________________ > 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
