Re: [Elecraft] Reset KX2 to factory settings.
No, I haven't. ... A friend changed my settings to display Morse to text and in trying to shut off that feature I sort of have CWT blinking and a lot of stuff I don't understand. Thank you, Jim W1FMR On Wed, Mar 2, 2022, 8:51 PM SGS 126 wrote: > Have you tried reloading the firmware? > > On Wed, Mar 2, 2022 at 7:26 PM jimith...@gmail.com > wrote: > >> I messed up settings trying to learn the menus . How do I get back, or >> to factory settings ? >> 72, >> >> Jim W1FMR >> >> Sent from Yahoo Mail on Android >> __ >> 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 >> Message delivered to brlo...@gmail.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 Message delivered to arch...@mail-archive.com
[Elecraft] K2 error replacing Q7 and Q8 PA devices
Removed the recently installed old defective devices and soldered in the new ones and bolted the case together and in my haste to see if they worked forgot to tighten the heat sink 4/40 nuts and touched the key and heard a high pitched squeek as the $19 (plus $8.95 postage ) matched devices bit the dust. This cheap partially built K2 flea market find is becoming time consuming and expensive. Laying around for 18 years in the open has made the dust and nicotine covered solder pads a bit oxidized and harder to solder. Sometimes a bargain is not the bargain it appears to be. Jim / W1FMR __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K2 Original problem of High Current and Low Power
Other problems discovered along the way with this partially assembled kit. Hi Don, Thank you so much for sticking with me on this. K2 #2438 Ver. A with no updates. I had measured 1.48V at bases of Q7 and Q8. (installed.) And as you suggested I removed the PA transistors and now measure 0.63 at base terminals with PAs out. I don't know how you figured that it was PA Q7 and Q8 that were bad Don but you were spot on ! It looks like the PA bias circuit is working but would like your opinion. The table in the manual for Q13 says: E = 0.6V B= 1.3V C= 7.5V (With PA transistors in) My voltages are : E= 0.63 B= 1.2 C= 8.17 (With PA transistors out) Think I should go ahead and put the new PA transistors in leaving the old bias transistors Q11 and 13 in place ? Thanks 73, Jim / W1FMR PS... The 8T transmit voltage is 8.19v. __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] Fwd: K2 Early Ver. A Power out problem #2438
-- Forwarded message - From: Jimithy66 Date: Thu, Jun 13, 2019 at 10:16 PM Subject: Re: [Elecraft] K2 Early Ver. A Power out problem #2438 To: Hi Don, the K2 is #2438 And has been sitting around half built for 18 years or so:-0 The manual for Rev. A calls for 16 turns for L25 and L26 and they are 16 turns. I will order the K2PAkit, and I have a good solder sucker and the wooden toothpick is a great idea. Thanks... R50 is 1/2 watt. With the PA transistors removed will check the bias circuit and reflow Bias solder joints before changing Q11 and Q13. Too bad there wasn't an easy way to isolate bias from the PA. Don, as a side note, If I touch a meter lead to R61, the collector of Q13, (PA bias) the 40m output power jumps up to 7 watts with Hi Cur displayed. Other than that the power barely reaches 2 watts with 1.9 amps. Thanks again Don, Jim / W1FMR On Thu, Jun 13, 2019 at 5:36 PM Don Wilhelm wrote: > Jim, > > Can I assume this is a newly purchased kit? Or are you building an > older one that has been sitting on someone's shelf for a long time with > Rev A boards. A serial number would be helpful - above SN 2999 will use > Rev B boards. > > Given that you have 1.4 volts on the base of the PA transistors, you > likely have one PA transistor zapped and the other may be weak. > Get the K2PAKIT from Elecraft (it contains matched PA transistors). > It also has replacements for Q11 and Q13 if needed and a replacement for > R50 if yours is not already 1/2 watt. It also contains new PA standoff > mounting hardware. > > First remove the PA transistors. If you do not have good removal tools, > clip the leads near the transistor body and remove the leads one at a > time. Clean up with solder wick and if solder remains in the holes, > heat the solder pad and push it out with a wooden toothpick. > > Now do a TUNE and measure the voltage at one of the base solder pad. It > should be 0.60 to 0.64 volts (0.8 volts is too high) If it is not > within that range, replace Q11 and Q13 and reflow the soldering on the > components in the bias circuit. Do NOT install Q7 and Q8 until the base > bias circuit is working correctly. > > After those checks (and only after), install Q7 and Q8. Do not transmit > without the heat sink installed if you value your new PA transistors. > > If this is an older Rev A kit, how many turns did you wind on L25 and > L26? The older Rev A uses 14 turns which is different than the newer kits. > > 73, > Don W3FPR > > On 6/13/2019 3:33 PM, Jimithy66 wrote: > > I finished building a basic kit with no options and the power output will > > not rise above 2 watts and current (2A) is too high for that power. > > Hi Cur flashes briefly before power output settles at 2 watts. > > > > Voltage checks found the PA base bias circuit putting out > > 1.4 VDC but 0.8 V is expected. > > > > Two PNA transistors Q11 and Q13 make up > > the bias circuit and wonder if anyone else remembers > > seeing this problem, and what may have caused it ? > > > > Thanks, > > > > Jim / W1FMR > __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K2 Early Ver. A Power out problem #2438
I finished building a basic kit with no options and the power output will not rise above 2 watts and current (2A) is too high for that power. Hi Cur flashes briefly before power output settles at 2 watts. Voltage checks found the PA base bias circuit putting out 1.4 VDC but 0.8 V is expected. Two PNA transistors Q11 and Q13 make up the bias circuit and wonder if anyone else remembers seeing this problem, and what may have caused it ? Thanks, Jim / W1FMR __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K2 ...Does High DC Current cause RF power to fold back ?
Am in final testing of a K2 Ver.A kit and transmit output will not go above 2 watts on an external power meter and 50 ohm load when keyed or pressing Tune. "Hi Cur" flashes briefly and power is limited to 2 watts DisplayE = 11.9 and I = 2.0 Keyed (Un-keyed I=0.22) . Any idea where to start looking ? Thanks, Jim / W1FMR __ 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] K2 PLL Ref. Oscillator Range Test Problem.
Thanks for your help Don and your suggestion on the mods. I had made the crystal and toroid mods but didn't think of the other components in the mod kits. Jim / W1FMR On Wed, May 22, 2019, 8:47 AM Don Wilhelm wrote: > Jim, > > It is likely to work OK even with the reduced PLL range. > If you want to correct it and gain some temperature stability for your > K2 at the same time, add the BFO upgrade modification - get BFOMDKT from > Elecraft. > > That kit contains a new PLL crystal as well as parts for the BFO. > > You can see older posts at Nabble. > > 73, > Don W3FPR > > On 5/22/2019 12:25 AM, Jimithy66 wrote: > > I am building an older QRP K2 kit ser. # 2438 Ver. A in > > the Alignment and test section Part 11. pg. 57, the > > PLL Ref. Oscillator Range Test is out of limits. > > > > The Reference High and Low frequencies are OK with > > readings (12100.53 high and 12089.43 low) with range > > limits of 11.5 - 25 KHz but it is low, 11.1 KHz. > > Is this a problem ? > > > __ 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] K2 PLL Ref. Oscillator Range Test Problem.
I am building an older QRP K2 kit ser. # 2438 Ver. A in the Alignment and test section Part 11. pg. 57, the PLL Ref. Oscillator Range Test is out of limits. The Reference High and Low frequencies are OK with readings (12100.53 high and 12089.43 low) with range limits of 11.5 - 25 KHz but it is low, 11.1 KHz. Is this a problem ? In the PLL troubleshooting section all readings are OK except the BFO buffer output (0.025 - 0.070 VRMS ) is slightly high 0.076 VRMS. Is this a problem ? And lastly, How do I visit the archives on this list ? Thank you, Jim / W1FMR __ 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] K2 Partially built extremely bare bones version A, # 2438.
Bought at a Ham Flea Market about 1/3 built and needing all upgrades and some missing parts. Am surprised that parts are still available from Elecraft, or rather hope that they are. It came with 2 right side panels and no left side. And if all goes well and it eventually works will be looking for an auto tuner board. Very excited about getting into it to see what comes out but it may be a long term project.. 72, Jim / W1FMR __ 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] KX2 update using Linux ?
Anyone able to tell me how to do it ? Thanks, Jim / W1FMR __ 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 Message delivered to arch...@mail-archive.com
[Elecraft] K2 Noise on 160m
Thanks to all that responded to my K2 problem and thanks for the Tips Sverre, LA3ZA. I had done a simple tone adjustment and probably messed up the filters because the receive frequency shifts when filter 3 and 4 are selected. After that is corrected I will re-visit the noise problem. Thanks again Gary, Don, Sverre, and the K9 that responded. See you in the QRP ARCI 160m 6 hour sprint Wed. evening (in the US). 73/ Jim / W1FMR *Message: 4Date: Mon, 25 Nov 2013 19:01:16 +From: Gary McKelvie >To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 Signal to Noise on 160m ?Message-ID: <43498680-08c7-4f61-b779-0871815fa...@btinternet.com <43498680-08c7-4f61-b779-0871815fa...@btinternet.com>>Content-Type: text/plain; charset=us-asciiThank you to Sverre for the link to a very interesting and useful web page. 73 Gary G7USCSent from my iPhone> On 24 Nov 2013, at 20:56, "Sverre Holm (LA3ZA)" > wrote:>> You don't give so much information here about how you did the sidetone pitch> adjustment, but it is easy to mess up things if you do that without> adjusting filters also.>> See item 3 in the list of 'Elecraft K2 do's and don'ts'> http://la3za.blogspot.no/2011/09/elecraft-k2-dos-and-donts.html <http://la3za.blogspot.no/2011/09/elecraft-k2-dos-and-donts.html>>>>> Jimithy66 wrote>> This a used K2 and I adjusted the STP (Sidetone Pitch)>> to my liking and wonder if that messed something up>> or is the K2 noisy on 160m ?>* *Sidetone frequency:* Don't be tempted to adjust the sidetone frequency if you want it higher or lower in pitch (Menu, sidetone P menu). Many radios allow this and the K2's menu gives the impression that it is straightforward to do so. The flip side of the coin is that all the filter settings (XFIL) and the audio filter (KAF2) also need to be readjusted, otherwise the filters will not match the new sidetone. __ 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] K2 Signal to Noise on 160m ?
Is there normally high noise on 160m with a K2 ? Comparing the K2 to an old Ten Tec Delta the k2 signals seem to be lower and noise higher. A sharp sizzling frying pan noise was pronounced on the K2 and uncomfortable to listen to but barely there on the Delta. This a used K2 and I adjusted the STP (Sidetone Pitch) to my liking and wonder if that messed something up or is the K2 noisy on 160m ? This is the QRP K2 with ATU but no Noise Blanker or DSP. Thanks, Jim / W1FMR __ 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] K1-4 Low power output only on 15 meters.
My K1 was a wonderful radio on all bands 40 - 17m. However 17m saw very little use and 15m was desired.. The 26.050 crystal was replaced with the kit supplied 29.000 MHz crystal for 15m and the K1 realigned on all bands. All seemed to go well with the receive and transmit alignment with the power level set to 2 watts per the manual. However now the power will not go above 2 watts on 15m.. All bands go to 5 watts measured on a WM-2 watt meter but on 15m the output stops at 2 watts.. 15m programs OK from 0.2 to 2.0 watts output but not higher. The K1 display reads 5.0 when being set with buttons but the K1 power output display reads only around 2.1 or so watts. . All frequencies are correct on another receiver. Am I missing something ? Any help would be appreciated. Thank you , 72/73 Jim / W1FMR . __ 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] WTB a K1-4 board only with 15m option - Wanted
I built my K1 with the 17m option and now find I want 15m for QRP contests. I don't think it is a good idea to remove components and rebuild for 15m but may do it if I have to. I have the 80 / 160m board and love it. In fact it's 160m that got me hooked on QRP contesting. 73/72, Jim / W1FMR @arrl.net __ 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
