Re: [Elecraft] K3 Power calibration failure
My two-year old K3/100 developed an intermittent power problem. At first I had the PA in and out a couple of times thinking it was the reported connector pin problem. No luck. I noted that pushing on the KANT3 board that is used with no ATU would fix the problem for a time. Fix meaning it would pass TXG on all bands. To make a long story shorter, I finally called Elecraft support. I was asked to read back the TXGN values and when I did, I was asked how come I had set them to those values. I hadn't knowingly done that but it turns out that when you do the wattmeter calibration, these are the values that get changed. I was instructed to change them back to the default values---with the comment that one should never do the wattmeter calibration. I suggested that if this is the case, maybe the procedure should be removed from the manual. Setting these values back to default (at least the numbers I was instructed to use) and loosening and retightening the screw at the standoff at upper rear corner of the radio fixed the problem. Wes N7WS --- On Thu, 5/26/11, Brian Alsop als...@nc.rr.com wrote: I'm posting this for KK4AOA. He will be joining the group later. He is doing a clean build. The K3 is a K3-10 so far with an internal antenna tuner and five filters. No subrx. Running the utility program transmit power calibration works fine on 160,80 and 60M but fails on 40M. Over the phone, we reviewed his crystal filter setup, redid the synthesizer calibration. Except for the above things seem to work. Suggestions at where to look next are welcome. He is unable to do the 5W wattmeter calibration because of no wattmeter. Hopefully the factory settings are close enough. There is also some ambiguity in that process. It tells you to put the AUT into the bypass mode (hold ATU). However, his K3 says the ATU isn't installed. (Two pages earlier in the manual under menu option enables it says to set KAT3 to BYP, which he did). These seem to be at odds with one another. Or does this indicate some potential problem with the KAT-3? 73 de Brian/K3KO __ 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 Power calibration failure
Brian, I am relpying out of stupidity. The K3 Utility tries to set the ATU to bypass. If it detects the KAT3, but it does not go into bypass, that would terminate the procedure. I suggest that he look at the KAT3 situation first. Once that is resolved, then other factors will either fall into place or will present themselves as a different problem. 73, Don W3FPR On 5/26/2011 8:05 PM, Brian Alsop wrote: I'm posting this for KK4AOA. He will be joining the group later. He is doing a clean build. The K3 is a K3-10 so far with an internal antenna tuner and five filters. No subrx. Running the utility program transmit power calibration works fine on 160,80 and 60M but fails on 40M. Over the phone, we reviewed his crystal filter setup, redid the synthesizer calibration. Except for the above things seem to work. Suggestions at where to look next are welcome. He is unable to do the 5W wattmeter calibration because of no wattmeter. Hopefully the factory settings are close enough. There is also some ambiguity in that process. It tells you to put the AUT into the bypass mode (hold ATU). However, his K3 says the ATU isn't installed. (Two pages earlier in the manual under menu option enables it says to set KAT3 to BYP, which he did). These seem to be at odds with one another. Or does this indicate some potential problem with the KAT-3? __ 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 Power calibration and current consumption
Hi Ken, There isn't any 100 W calibration on the K3. All gain calibration is done at 5 and 50 W (and optionally 1 mW if you have a KXV3). These are the points we picked do the cal, and the firmware then extrapolates from there. So, how accurate the rig is at any setting from 13 to 100 W depends on whether you've done the 50 W calibration. There is one additional form of optional calibration: the K3's wattmeter. See CONFIG:WMTR in the owner's manual. 73, Wayne N6KR On Feb 26, 2009, at 7:42 AM, Ken Kopp wrote: I may well be the only one caught by this, but be sure that the TRANSMITTER GAIN procedure on pages 49 and 50 of the manual has been done, but also include the 100W level. IMO, the first paragraph under WATTMETER on page 49 should read ... 5 W, 50 W , 100 W (K3/100 only) etc. --- http://www.elecraft.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
Re: [Elecraft] K3 - Power Calibration
The calibration should be fine on the rest of the bands. It's a good thing that the last band calibrated is the one you had problems with! 73 de Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred Jensen Sent: Thursday, January 08, 2009 4:33 PM To: Elecraft Reflector Subject: [Elecraft] K3 - Power Calibration I downloaded K3 Utility 1.2.1.6 and beta FW 2.78 and ran the TX Power Calibration. Really slick! On the 5W calibration, I got the message that the SWR was too high [2.5:1] from my dummy load [part of my MFJ antenna tuner] on 6m. The 50W run went just fine. K3 works fine, although I don't have a 6m antenna so I haven't tried it out there. Since I'm not on 6 right now, and no plans to get on, is my calibration good on the rest of the bands or do I need to find a better 6m load? The power on banner is kinda cool :-) 73, Fred K6DGW - Northern California Contest Club - CU in the 2009 Cal QSO Party 3-4 Oct 2009 - www.cqp.org ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 power calibration problem
In case anyone is still interested, the problem turned out not to have anything to do with firmware. I replaced the wattmeter diodes and it works fine now. Al N1AL On Thu, 2008-10-16 at 14:50, Alan Bloom wrote: I just installed the KRX3 and upgraded to the latest firmware (MCU 02.46 DSP 01.92, from 02.10/01.81). Now the power calibration is way off. Even adjusting CONFIG:WMTR LP and CONFIG:WMTR HP to the end of their range (180) I can't get the power low enough. For example, setting 75 watts gives about 100W output on an external wattmeter. A 5W setting gives about 7W output. I'm almost certain this problem did not exist before I upgraded. Anybody have any ideas? Al N1AL ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
