K3: ADC Ref calibration
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I'm wondering if this new ADC reference calibration
affects any other calibration settings. Are there other parts
of the calibration procedure we should repeat after changing this setting from
the default?
Tom Whiteside N5TW
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Tom Whiteside (N5TW) wrote:
> I'm wondering if this new ADC reference calibration affects any other > calibration settings. Are there other parts of the calibration > procedure we should repeat after changing this setting from the > default? Hi Tom, At present only the PLL voltage and supply voltage measurements are affected by the ADC REF calibration. You shouldn't have to re-do any other calibration steps. 73, Wayne N6KR --- http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Tom Whiteside
>Hi Tom,
> >At present only the PLL voltage and supply voltage measurements are >affected by the ADC REF calibration. You shouldn't have to re-do any >other calibration steps. > >73, >Wayne >N6KR Thanks Wayne,
What prompted the question
was getting a PLL error when using the sub receiver during the 10M
contest. I was running QRP so did not think it was temp
related. I've not had any occasion to try the sub receiver on 10M
after initial testing so don't have a pre-firmware data point on
that. Re-running the PLL cal on the sub receiver cleared the
problem. I guess I should re-calibrate the main receiver PLL
too... Have not noticed any problems with the main receiver after
doing the ADC Ref cal...
I also had problems with
SSB and my Alpha this weekend that I had wondered were maybe related to either
the firmware upgrade or this ADC calibration. I had to crank
the power back to the point of turning off the 100W K3 amp to not overdrive the
Alpha! Calibrating the power at 50W did not affect that.
Have not tried reverting to the previous beta firmware.
Tom Whiteside N5TW
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Don't you hate it when your calibrated multimeter displays 5.00V on pin 2 of the ACC connector and you then don't have a reason for altering the setting? I feel like I've missed out :)
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Just use a different (uncalibrated) DMM.... Then you can change the
setting _twice_! matt zilmer, W6NIA On Mon, 15 Dec 2008 18:07:07 -0800 (PST), you wrote: > >Don't you hate it when your calibrated multimeter displays 5.00V on pin 2 of >the ACC connector and you then don't have a reason for altering the setting? >I feel like I've missed out :) > > >----- >Shane >K3/10: S/N 2127, KBPF3, KFL3B-FM, KFL3A-6K, KFL3A-2.8K, KFL3A-400, KTCXO3-1 >& KXV3. Elecraft mailing list Post to: [hidden email] 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 |
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The multimeter *did* read 5.007 volts but I couldn't enter the additional 7mV into the K3. Talk about annoying....
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You have the satisfaction of knowing that your're right on the mark
then. Well... at least very close. AND you've been spot on the whole time you've had the K3. Suggestion: Find somewhere else to tinker. The S-Meter is a good target. There has been some debate on that. Same with AGC adjustments. There is a lot to do here with the K3. Operating it is the best part. I think Elecraft has found us a whole new hobby, or a set of them. 73, matt, W6NIA K3 #24, K2 #2810, etc. On Mon, 15 Dec 2008 20:39:28 -0800 (PST), you wrote: > >The multimeter *did* read 5.007 volts but I couldn't enter the additional 7mV >into the K3. Talk about annoying.... > > >Matt Zilmer wrote: >> >> Just use a different (uncalibrated) DMM.... Then you can change the >> setting _twice_! >> >> matt zilmer, W6NIA >> >> On Mon, 15 Dec 2008 18:07:07 -0800 (PST), you wrote: >> >>> >>>Don't you hate it when your calibrated multimeter displays 5.00V on pin 2 >of >>>the ACC connector and you then don't have a reason for altering the >setting? >>>I feel like I've missed out :) >>> >>> >>>----- >>>Shane >>>K3/10: S/N 2127, KBPF3, KFL3B-FM, KFL3A-6K, KFL3A-2.8K, KFL3A-400, >KTCXO3-1 >>>& KXV3. >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> 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 >> >> > > >----- >Shane >K3/10: S/N 2127, KBPF3, KFL3B-FM, KFL3A-6K, KFL3A-2.8K, KFL3A-400, KTCXO3-1 >& KXV3. Elecraft mailing list Post to: [hidden email] 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 |
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I spend most of my time tinkering with the AGC-THR, AGC-SLP and RX-EQ - wish I had a dollar for every minute I've spent with the RX-EQ but that's The Other thread.
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In reply to this post by wayne burdick
My DMM say only 4.93v on pin 2 of the ACC connector. After calibration, supply voltage measure show me 13.7V, actually it should be 13.85v(test on K3 PS connector).
During the 100w key down test, K3 shows 13.1~13.2v, but actually it should be 13.81V. <I use DAIWA 32A PS> So, I think 5V "standard" is not so stable. Maybe it is not so important to power supply voltage test. but I think it is very important to TCXO module. According to my test, TCXO is much sensitive to power supply voltage change (than temperature change). Any comments? 73 de BA4RF David On Tue, Dec 16, 2008 at 1:06 AM, wayne burdick <[hidden email]> wrote:
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