KX3 Low Band Noise 20M?
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Hi Everyone,
I have recently noticed that 20M exhibits much lower band noise and signal strength (CW Mode) as compared to 30M, 40M & 80M. S/N 01298F, MCU 1.87, DSP1.28, ATU in or out no change, Pre-Amp set to 20db all bands, AF set to 15, PS 13.7v. No software tweaks, KX3 as it left the Factory except for utility updates. Measurements with an XG2 at 50 microV, 20M S6 40M S9 as expected 80M S9 as expected Any ideas why 20M is noticeably lower? Many thanks for your help. 73. Mark G3XYS/NS1Q MacBook Pro NNNN ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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The power lead/barrel connector on the second #2334 KX3 is starting to
intermittently drop out. Most notable if you remove the internal batteries and try and operate from a supply only. It seems it is the socket itself that is duff. Yes using the Elecraft power leads not something homebrewed. I am thinking it might be worth removing the socket, fitting a couple of power poles on a pig tail, and a grommet where the original socket was. Anyone else done anything similar? A second wash with iso propyl alcohol and the KX3 I thought wind blown sand had killed (#1082) seems fine now... there was a lot of dirt/dust that had not previously been removed. 72 Dom M1KTA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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I had the same issue with my kx3. Investigation revealed that their was a
dry joint between the power socket and the PCB. Soldered it properly, not had the problem since Dave G4fre Date: Mon, 17 Feb 2014 16:26:00 +0000 From: Dominic Baines <[hidden email]> To: [hidden email] Subject: [Elecraft] KX3 Power Socket Message-ID: <[hidden email]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed The power lead/barrel connector on the second #2334 KX3 is starting to intermittently drop out. Most notable if you remove the internal batteries and try and operate from a supply only. It seems it is the socket itself that is duff. Yes using the Elecraft power leads not something homebrewed. I am thinking it might be worth removing the socket, fitting a couple of power poles on a pig tail, and a grommet where the original socket was. Anyone else done anything similar? A second wash with iso propyl alcohol and the KX3 I thought wind blown sand had killed (#1082) seems fine now... there was a lot of dirt/dust that had not previously been removed. 72 Dom M1KTA ------------------------------ Message: 27 Date: Mon, 17 Feb 2014 11:35:39 -0500 From: John Bohnovic <[hidden email]> To: Klaus Koppendorfer <[hidden email]> Cc: Elecraft Reflector <[hidden email]>, "[hidden email]" <[hidden email]> Subject: Re: [Elecraft] CW QRQ and SPLIT Message-ID: <[hidden email]> Content-Type: text/plain; charset=utf-8 Do you need the RIT mode when the other station is zero beat with your signal? John/K4WJ ex KN8PXG K8PXG ZF2HZ Sent from my iPad > On Feb 17, 2014, at 3:05 AM, Klaus Koppendorfer <[hidden email]> wrote: > > It is sad that QRQ mode has no RIT !!! > Cw up from 30 to 35 WPM hast o use QRQ mode because of struggling dits and dahs > > Many highspeed ops VHSC EHSC has changed from k3 to FT5000 because of leaking RIT with QRQ with K3 > > Maybe Wayne will sharpen Firmware in future for QRQ mode > > If rit/split is necessary i use 2nd RX but this is not so comfortable > > 73 > Oe6kyg > Klaus > > > -----Urspr?ngliche Nachricht----- > Von: [hidden email] > Gesendet: Samstag, 15. Februar 2014 22:06 > An: Jorge Diez - CX6VM; 'Elecraft Reflector' > Betreff: Re: [Elecraft] CW QRQ and SPLIT > > Jorge, > > AFAIK, probably not. The frequency must be shifted from RX to TX, and with QRQ in effect it is not possible to shift that fast. A K3 with 'chirp' on the ham bands would not be a nice thing to hear. > > 73, > Don W3FPR > >> On 2/15/2014 2:33 PM, Jorge Diez - CX6VM wrote: >> I saw in the manual of K3 that CW QRQ is "temporarily turned OFF" with >> SPLIT. >> >> Will be in the future any way to use it in SPLIT mode or is impossible? > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > 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:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ------------------------------ _______________________________________________ Elecraft mailing list Post to: [hidden email] http://mailman.qth.net/mailman/listinfo/elecraft You must be a subscriber to post. Elecraft web page: http://www.elecraft.com End of Elecraft Digest, Vol 118, Issue 33 ***************************************** ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Dominic Baines-3
Dom,
If I had to guess, I would say that you have a KX3 from before they began gluing the power jack to the board. The solder pads just were not enough to stand the lateral forces of plugging and unplugging over time, so Elecraft began to glue the power jack - I don't recall what serial number the gluing started at. You may be able to remove your existing power jack, apply a little epoxy glue under it and re-solder, but if the jack itself is damaged, you can request a new jack from Elecraft (contact support), or obtain an RSA and send it in to be repaired. I would think the APP connector would be bulky on the KX3, but then that would be your decision. 73, Don W3FPR On 2/17/2014 11:26 AM, Dominic Baines wrote: > The power lead/barrel connector on the second #2334 KX3 is starting to > intermittently drop out. Most notable if you remove the internal > batteries and try and operate from a supply only. It seems it is the > socket itself that is duff. Yes using the Elecraft power leads not > something homebrewed. > > I am thinking it might be worth removing the socket, fitting a couple > of power poles on a pig tail, and a grommet where the original socket > was. > > Anyone else done anything similar? ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Dave-3
Thanks Dave,
Pretty sure it is the barrel connector on the board due to being removed over and over not a dry joint but will inspect. The end of the socket connector has the look of a scorch mark which seems a bit ott for the sort of power the KX3 draws. I am informed that later KX3's (borrowed a locals who bought his recently) are now glued down as well. 72 Dom M1KTA On 17/02/2014 17:39, WW2R Elecraft wrote: > I had the same issue with my kx3. Investigation revealed that their was a > dry joint between the power socket and the PCB. Soldered it properly, not > had the problem since > > Dave > > G4fre > > Date: Mon, 17 Feb 2014 16:26:00 +0000 > From: Dominic Baines <[hidden email]> > To: [hidden email] > Subject: [Elecraft] KX3 Power Socket > Message-ID: <[hidden email]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > The power lead/barrel connector on the second #2334 KX3 is starting to > intermittently drop out. Most notable if you remove the internal > batteries and try and operate from a supply only. It seems it is the > socket itself that is duff. Yes using the Elecraft power leads not > something homebrewed. > > I am thinking it might be worth removing the socket, fitting a couple of > power poles on a pig tail, and a grommet where the original socket was. > > Anyone else done anything similar? > > A second wash with iso propyl alcohol and the KX3 I thought wind blown > sand had killed (#1082) seems fine now... there was a lot of dirt/dust > that had not previously been removed. > > 72 > > Dom > M1KTA > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Dominic Baines-3
Hi all... update for everyone.
Elecraft support were great. Many thanks to Lisa for sending out the replacements PDQ....on mine it definitely was the case no glue on underside of either KX3... #1082 and #2334. The sockets are surface mount and there are 4 pads the note said work on three only but all 4 had been soldered. I soldered all 4 on the replacements too. I had a time issue so could not return the unit to Elecraft and I am used to working on surface mount so this was not a problem for me. I would not advise this unless you really know what you are doing and can handle soldering surface mount. Sending your KX3 to Elecraft will be a much better way to get this done if you need to. The earlier #1082 was the worst and the metal was very tarnished. Probably due to the extensive use in sea side locations. I used super glue cell/ cyano acrylate to glue down the new sockets in place. I did consider using a pigtail and anderson power poles... in future rig enhancements I would suggest Elecraft perhaps consider it?... might add a few cents to the price but given the issues you have when power is no good then I would think it is worth the extra. I will now have both KX3 operational in C5 from 27th ... 72 Dom M1KTA On 17/02/2014 16:26, Dominic Baines wrote: > The power lead/barrel connector on the second #2334 KX3 is starting to > intermittently drop out. Most notable if you remove the internal > batteries and try and operate from a supply only. It seems it is the > socket itself that is duff. Yes using the Elecraft power leads not > something homebrewed. > > I am thinking it might be worth removing the socket, fitting a couple > of power poles on a pig tail, and a grommet where the original socket > was. > > Anyone else done anything similar? > > A second wash with iso propyl alcohol and the KX3 I thought wind blown > sand had killed (#1082) seems fine now... there was a lot of dirt/dust > that had not previously been removed. > > 72 > > Dom > M1KTA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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