For powering my Elecraft K3S and P3, I am using the Astron RS-35 power supply feeding a West Mountain DC-to-Go PWR gate PG40S and Rigrunner 4007U with a 79 Amp hour battery.
Living on an island, we have many spikes and losses of power during the year. I figure that if I'm spending a sizable amount for my rig, I should have a good power supply. -----Original Message----- >From: elecraft-requ...@mailman.qth.net >Sent: Oct 29, 2015 7:41 AM >To: elecraft@mailman.qth.net >Subject: Elecraft Digest, Vol 138, Issue 40 > >Send Elecraft mailing list submissions to > elecraft@mailman.qth.net > >To subscribe or unsubscribe via the World Wide Web, visit > http://mailman.qth.net/mailman/listinfo/elecraft >or, via email, send a message with subject or body 'help' to > elecraft-requ...@mailman.qth.net > >You can reach the person managing the list at > elecraft-ow...@mailman.qth.net > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Elecraft digest..." > > >Today's Topics: > > 1. KX3 to Computer (Forest Shick) > 2. Re: KX3 to Computer (Martin Waller) > 3. K3 and Wsjt (Guy F2CT) > 4. Re: KX3 to Computer (Lyle Johnson) > 5. Re: KX3 to Computer (martin waller) > 6. Re: KX3 to Computer (Lynn W. Taylor, WB6UUT) > 7. Re: KX3 to Computer (martin waller) > 8. For Sale: K3 Xtal Filters (William Evans) > 9. Re: KX3 AGC HLD settings (Cady, Fred) > 10. K3 Xtal Filters for sale (really!) (William Evans) > 11. Re: For Sale: K3 Xtal Filters (Ian - Ham) > 12. Icoms answer to the KX3?? (Joe W2KJ) > 13. Re: Icoms answer to the KX3?? (Lynn W. Taylor, WB6UUT) > 14. Re: K3 Xtal Filters for sale (really!) (William Evans) > 15. Re: K3 - PSK31 - AGC/No AGC (David Woolley) > 16. Re: K3 and Wsjt (Michael Eberle) > 17. Re: K3 - PSK31 - AGC/No AGC (Don Wilhelm) > 18. Re: Icoms answer to the KX3?? (Wayne Burdick) > 19. Re: K3 - PSK31 - AGC/No AGC (Bob McGraw - K4TAX) > 20. Re: K3 - PSK31 - AGC/No AGC (Fred Jensen) > 21. Re: K3 - PSK31 - AGC/No AGC (Bob McGraw - K4TAX) > 22. Re: Icoms answer to the KX3?? (Martin Storli - LA8OKA) > 23. Re: K3S In-Depth Review Coming Soon? (Ian White) > 24. Re: Icoms answer to the KX3?? (Heinz B?rtschi) > 25. Which of these would make the best power supply for the > K3(S)? (Peter Pauly) > 26. Re: KRC2 rs232 to cpu not working (Gordon LaPoint) > 27. Re: Which of these would make the best power supply for the > K3(S)? (Bob McGraw - K4TAX) > 28. Re: Which of these would make the best power supply for the > K3(S)? (Mike K2MK) > 29. IMD and supply voltage (frank) > 30. Re: IMD and supply voltage (Don Wilhelm) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Wed, 28 Oct 2015 16:58:09 -0400 >From: "Forest Shick" <fsh...@rochester.rr.com> >To: <elecraft@mailman.qth.net> >Subject: [Elecraft] KX3 to Computer >Message-ID: <000001d111c3$5a521a00$0ef64e00$@rochester.rr.com> >Content-Type: text/plain; charset="us-ascii" > >What is the easiest way to connect the KX3 to a computer for RTTY, PSK31 & >SSTV. I have purchased the cable set. I connect the KX3 - Phones connector >to the computer audio in and I can receive RTTY & SSTV. If I connect the >computer audio out to the KX3 MIC, the radio goes into transmit. I would >guess this is because the connector on the cable is incorrect for the MIC >connector - too few contacts. > > > >So how do you connect the audio for transmitting? > >Thank You > > > >------------------------------ > >Message: 2 >Date: Wed, 28 Oct 2015 21:21:09 +0000 (UTC) >From: Martin Waller <mar...@the-wallers.net> >To: Forest Shick <fsh...@rochester.rr.com>, > "elecraft@mailman.qth.net" <elecraft@mailman.qth.net> >Subject: Re: [Elecraft] KX3 to Computer >Message-ID: > <908986974.6767064.1446067269138.javamail.ya...@mail.yahoo.com> >Content-Type: text/plain; charset=UTF-8 > >Hi, >Good questions. I have been playing with RTTY myself this last few days and >hit just that problem. I have been holding the microphone infront of the PC >speaker in the interim as that worked as a temporary solution. >I would like to know the best way of doing this too. >MartinG0PJO > > > On Wednesday, 28 October 2015, 20:58, Forest Shick > <fsh...@rochester.rr.com> wrote: > > > What is the easiest way to connect the KX3 to a computer for RTTY, PSK31 & >SSTV. I have purchased the cable set. I connect the KX3 - Phones connector >to the computer audio in and I can receive RTTY & SSTV. If I connect the >computer audio out to the KX3 MIC, the radio goes into transmit. I would >guess this is because the connector on the cable is incorrect for the MIC >connector - too few contacts. > > > >So how do you connect the audio for transmitting? > >Thank You > >______________________________________________________________ >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 mar...@the-wallers.net > > > > >------------------------------ > >Message: 3 >Date: Wed, 28 Oct 2015 22:24:56 +0100 >From: Guy F2CT <f...@wanadoo.fr> >To: elecraft@mailman.qth.net >Subject: [Elecraft] K3 and Wsjt >Message-ID: <7nnbgyeix10vxamp0v89fe3r.1446067496...@email.android.com> >Content-Type: text/plain; charset=utf-8 > >Hello >I need some help in order to use my K3 + K144XV in JT modes. >What's the best adaptor between K3 and PC ? >Thanks a lot for help. >Kundest Regards > >Cordiales 73 >Guy F2CT > >------------------------------ > >Message: 4 >Date: Wed, 28 Oct 2015 14:44:19 -0700 >From: Lyle Johnson <kk7p4...@gmail.com> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] KX3 to Computer >Message-ID: <563141b3.2060...@gmail.com> >Content-Type: text/plain; charset=utf-8; format=flowed > >Disable the mic buttons (see menu items) and use VOX (or a serial port >command) to switch between Tx and Rx depending on your program's features. > >And be sure to set MIG GAIN to ZERO then gradually increase it to get >the 4-5 bars of ALC indication. If the MIC GAIN is too high for the >computer's audio level, the ALC bar graph and the transmit audio levels >may not respond properly (this is a bug on my short list to fix). > >73, > >Lyle KK7P > >> Good question...I have been holding the microphone infront of the PC speaker >> in the interim as that worked as a temporary solution. >> ... >> >> What is the easiest way to connect the KX3 to a computer for RTTY, PSK31 & >> SSTV... >> >> So how do you connect the audio for transmitting? > > > >------------------------------ > >Message: 5 >Date: Wed, 28 Oct 2015 22:01:20 +0000 >From: martin waller <mar...@the-wallers.net> >To: Lyle Johnson <kk7p4...@gmail.com> >Cc: "elecraft@mailman.qth.net" <elecraft@mailman.qth.net> >Subject: Re: [Elecraft] KX3 to Computer >Message-ID: <c080977b-9964-4332-993b-86a79d323...@the-wallers.net> >Content-Type: text/plain; charset=us-ascii > >Hi Lyle > >Many thanks for the complete explanation. I'll give it a whirl. > >Martin >G0PJO > >Sent from my iPhone > >> On 28 Oct 2015, at 21:44, Lyle Johnson <kk7p4...@gmail.com> wrote: >> >> Disable the mic buttons (see menu items) and use VOX (or a serial port >> command) to switch between Tx and Rx depending on your program's features. >> >> And be sure to set MIG GAIN to ZERO then gradually increase it to get the >> 4-5 bars of ALC indication. If the MIC GAIN is too high for the computer's >> audio level, the ALC bar graph and the transmit audio levels may not respond >> properly (this is a bug on my short list to fix). >> >> 73, >> >> Lyle KK7P >> >>> Good question...I have been holding the microphone infront of the PC >>> speaker in the interim as that worked as a temporary solution. >>> ... >>> >>> What is the easiest way to connect the KX3 to a computer for RTTY, PSK31 & >>> SSTV... >>> >>> So how do you connect the audio for transmitting? >> >> ______________________________________________________________ >> 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 mar...@the-wallers.net > > >------------------------------ > >Message: 6 >Date: Wed, 28 Oct 2015 15:16:51 -0700 >From: "Lynn W. Taylor, WB6UUT" <k...@coldrockshotbrooms.com> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] KX3 to Computer >Message-ID: <56314953.7030...@coldrockshotbrooms.com> >Content-Type: text/plain; charset=windows-1252; format=flowed > >This looks useful: https://k4mtx.wordpress.com/2013/04/11/kx3-fldigi-setup/ > >It's specific to FLDIGI, but all of the soundcard modes require pretty >much the same wiring. > >Please note: if you hold the microphone to the PC speaker, the >microphone will pick up background noise and transmit that all over the >band. > >Generally speaking, you'll be operating in a part of the band that >discourages wideband noise. > >73 -- Lynn > > >------------------------------ > >Message: 7 >Date: Wed, 28 Oct 2015 22:29:28 +0000 >From: martin waller <mar...@the-wallers.net> >To: "Lynn W. Taylor, WB6UUT" <k...@coldrockshotbrooms.com> >Cc: "elecraft@mailman.qth.net" <elecraft@mailman.qth.net> >Subject: Re: [Elecraft] KX3 to Computer >Message-ID: <08251545-92e4-4083-b71b-88ae4f6ba...@the-wallers.net> >Content-Type: text/plain; charset=us-ascii > >Hi > >Thanks for the tip about holding the microphone! I've only played on 2m so far >so I should not have upset too many people! > >Martin > >Sent from my iPhone > >> On 28 Oct 2015, at 22:16, "Lynn W. Taylor, WB6UUT" >> <k...@coldrockshotbrooms.com> wrote: >> >> This looks useful: https://k4mtx.wordpress.com/2013/04/11/kx3-fldigi-setup/ >> >> It's specific to FLDIGI, but all of the soundcard modes require pretty much >> the same wiring. >> >> Please note: if you hold the microphone to the PC speaker, the microphone >> will pick up background noise and transmit that all over the band. >> >> Generally speaking, you'll be operating in a part of the band that >> discourages wideband noise. >> >> 73 -- Lynn >> ______________________________________________________________ >> 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 mar...@the-wallers.net > > >------------------------------ > >Message: 8 >Date: Wed, 28 Oct 2015 18:33:51 -0400 >From: William Evans <w4...@w4ish.net> >To: Elecraft@mailman.qth.net >Subject: [Elecraft] For Sale: K3 Xtal Filters >Message-ID: <d7ea3e0e-4ba9-491d-bc27-5faf7d375...@w4ish.net> >Content-Type: text/plain; charset="us-ascii" > > > >------------------------------ > >Message: 9 >Date: Wed, 28 Oct 2015 22:35:47 +0000 >From: "Cady, Fred" <fc...@montana.edu> >To: GRANT YOUNGMAN <n...@tx.rr.com>, Elecraft Reflector > <elecraft@mailman.qth.net> >Subject: Re: [Elecraft] KX3 AGC HLD settings >Message-ID: > > <cy1pr0201mb08091b6d5f1cf70a341a8a03af...@cy1pr0201mb0809.namprd02.prod.outlook.com> > >Content-Type: text/plain; charset="Windows-1252" > >Hi Grant, >When I did my KX3 books I somehow figured out it is 0.00 to 2.00 seconds. >That's what the K3 does and I assume the KX3 is the same. >Cheers, >Fred KE7X > >Author of: >?The Elecraft K3S and P3 ? Getting the Most out from Your High Performance >Station?. >"The Elecraft K3: Design, Configuration and Operation 2nd ed" >"The Portable Elecraft KX3 ? Going for the Summit with the KX3 and KX3-2M/4M" >?The Elecraft KX-Line ? The Complete Station? >?The Elecraft KPA500 and KAT500 ? the K-Line Dream Station? >Printed, coil bound copies of these are all available at www.elecraft.com >PDF files available from www.ke7x.com >?The Elecraft KXPA100, PX3 and 2M/4M Transverters ? Assembling the KX3-Line >Station? printed copy available at www.lulu.com and pdf from www.ke7x.com. >Plus a book dedicated to the K3S upgrades for the K3 and a 3rd Edition of the >K3 book are works in progress. >Free guides at ke7x.com >KPA500 and KAT500 Quick Set Up Guide >http://www.ke7x.com/home/k-line-introduction-and-set-up-guide >KAT500 and KXPA500 Tuner Operation >http://www.ke7x.com/home/kat500-and-kxpa100-tuners > > >________________________________________ >From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of GRANT YOUNGMAN ><n...@tx.rr.com> >Sent: Wednesday, October 28, 2015 10:07 AM >To: Elecraft Reflector >Subject: [Elecraft] KX3 AGC HLD settings > >The KX3 manual indicates that the AGC HLD setting is in ?seconds?. It doesn?t >appear that ?001? in the three digit display is one second. > >I suspect its either ?(.)XXX? seconds or ?X(.)XX? seconds. I must have missed >something in the book somewhere. A search on Nabble, update history, etc. >didn?t go anywhere either. > >Can someone shed some light? > >Thanks ? Grant NQ5T > > >______________________________________________________________ >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 fc...@montana.edu > > >------------------------------ > >Message: 10 >Date: Wed, 28 Oct 2015 18:38:38 -0400 >From: William Evans <w4...@w4ish.net> >To: Elecraft@mailman.qth.net >Subject: [Elecraft] K3 Xtal Filters for sale (really!) >Message-ID: <86c7005c-7677-4373-b18f-be58280f5...@w4ish.net> >Content-Type: text/plain; charset=us-ascii > >KFL3A-6K 8 pole filter for K3 or K3S $110 - includes shipping CONUS >KFL3A-400 8-Pole filter for K3 or K3S $110 - includes shipping CONUS > >both for $210 including shipping > >Bill >W4ish @ w4ish.net > > >------------------------------ > >Message: 11 >Date: Wed, 28 Oct 2015 18:39:56 -0400 >From: "Ian - Ham" <km4ik....@gmail.com> >To: "'William Evans'" <w4...@w4ish.net>, <Elecraft@mailman.qth.net> >Subject: Re: [Elecraft] For Sale: K3 Xtal Filters >Message-ID: <000701d111d1$924fb7b0$b6ef2710$@gmail.com> >Content-Type: text/plain; charset="us-ascii" > >Which ones? How much? > >Thanks and 73, > >--Ian >Ian Kahn, KM4IK >Roswell, GA EM74ua >km4ik....@gmail.com >10-10 #74624, North Georgia Chapter #2038 >PODXS 070 #1962 >K3# 281, P3 #688, KAT500 #860, KPA500 #1468 > > >-----Original Message----- >From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of >William Evans >Sent: Wednesday, October 28, 2015 6:34 PM >To: Elecraft@mailman.qth.net >Subject: [Elecraft] For Sale: K3 Xtal Filters > > >______________________________________________________________ >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 km4ik....@gmail.com > > >--- >This email has been checked for viruses by Avast antivirus software. >https://www.avast.com/antivirus > > > >------------------------------ > >Message: 12 >Date: Wed, 28 Oct 2015 18:48:42 -0400 >From: Joe W2KJ <w...@bellsouth.net> >To: elecraft@mailman.qth.net >Subject: [Elecraft] Icoms answer to the KX3?? >Message-ID: <b6c72488-a9b5-4689-9b8b-0f76ea582...@bellsouth.net> >Content-Type: text/plain; charset=us-ascii > >Howdy Fellow Elecrafters: > >Saw something new from Icom called the IC7300. > >Looks like a direct conversion architecture ala the KX3 but larger in size, I >believe. > >The KX3 might have been the first such multi-band design with front panel >display, knobs. buttons, etc, similar to traditional superhet transceivers and >it appears that Icom is following the lead. > >Would love to see the technical specs on this new rig. > > 73, Joe W2KJ > KX3/KXPA100 > >------------------------------ > >Message: 13 >Date: Wed, 28 Oct 2015 15:59:08 -0700 >From: "Lynn W. Taylor, WB6UUT" <k...@coldrockshotbrooms.com> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] Icoms answer to the KX3?? >Message-ID: <5631533c.6050...@coldrockshotbrooms.com> >Content-Type: text/plain; charset=windows-1252; format=flowed > >It has a Touch Screen! Sweet!! > ><ducking> > >On 10/28/2015 3:48 PM, Joe W2KJ wrote: >> Howdy Fellow Elecrafters: >> >> Saw something new from Icom called the IC7300. >> >> Looks like a direct conversion architecture ala the KX3 but larger in size, >> I believe. >> >> The KX3 might have been the first such multi-band design with front panel >> display, knobs. buttons, etc, similar to traditional superhet transceivers >> and it appears that Icom is following the lead. >> >> Would love to see the technical specs on this new rig. >> >> 73, Joe W2KJ >> KX3/KXPA100 > > >------------------------------ > >Message: 14 >Date: Wed, 28 Oct 2015 19:00:37 -0400 >From: William Evans <w4...@w4ish.net> >To: Elecraft@mailman.qth.net >Subject: Re: [Elecraft] K3 Xtal Filters for sale (really!) >Message-ID: <524458ed-6117-4798-a4b7-82fd91ba7...@w4ish.net> >Content-Type: text/plain; charset=us-ascii > >Gentlemen, >the 6K filter is spoken for (pending payment) Thanks > >Bill >W4ISH >> On Oct 28, 2015, at 6:38 PM, William Evans <w4...@w4ish.net> wrote: >> >> KFL3A-6K 8 pole filter for K3 or K3S $110 - includes shipping CONUS >> KFL3A-400 8-Pole filter for K3 or K3S $110 - includes shipping CONUS >> >> both for $210 including shipping >> >> Bill >> W4ish @ w4ish.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 >> Message delivered to w4...@w4ish.net > > > >------------------------------ > >Message: 15 >Date: Wed, 28 Oct 2015 23:33:18 +0000 >From: David Woolley <for...@david-woolley.me.uk> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] K3 - PSK31 - AGC/No AGC >Message-ID: <56315b3e.5050...@david-woolley.me.uk> >Content-Type: text/plain; charset=windows-1252; format=flowed > >Although I hadn't noticed it before, I would say that design in the K2 >is more about stability and DC offsets than anything to do with pick up >of the BFO. The balanced demodulator and last two crystals deal with that. > >The old, basically AM sets, used high level, unbalanced detectors. That >required more total gain from aerial to detector, although that might be >split between RF and two IF frequencies. > >Balanced detectors can work with much lower level signals, which is >particularly helpful for a single conversion design, like the K2. >However, the AGC detector doesn't want to be balanced, and with a low >level signal, would have a large DC offset, that might exceed the wanted >rectified AGC, therefore additional gain is needed before the AGC >detector. If this were done at the IF frequency, the gain from input to >output at one frequency would be much greater, and proportionately less >stray coupling would be needed to make the whole system oscillate. By >shifting the frequency, which can be done at low signal levels, the >design reduces the gain at any one frequency. > >The risk with doing all at one frequency is not pickup of the BFO at the >input of the IF amplifier, but pickup of its own output. > >If there were leakage of the BFO it would get amplified just as much as >if additional gain was tapped off at the same point and amplified at the >original frequency. The design seems to rely on the balance of the >detector and the two pole crystal filter, to stop the BFO getting into >the AGC path, and not the difference in frequency. > >-- >David Woolley >Owner K2 06123 >On 28/10/15 03:15, Ron D'Eau Claire wrote: > >> >> The most successful solutions (before SDR technology took over) were to >> split the I.F. with a second mixer that was far removed from the main I.F. >> the second I.F. was used to generate the AGC voltage and, since it was on a >> wholly different frequency from the main I.F. the BFO didn't trigger the >> AGC. In fact, the Elecraft K2 uses that technique quite successfully. > > > >------------------------------ > >Message: 16 >Date: Wed, 28 Oct 2015 18:52:54 -0500 >From: Michael Eberle <mtebe...@mchsi.com> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] K3 and Wsjt >Message-ID: <56315fd5.6070...@mchsi.com> >Content-Type: text/plain; charset="windows-1252" > > > >------------------------------ > >Message: 17 >Date: Wed, 28 Oct 2015 20:19:53 -0400 >From: Don Wilhelm <w3...@embarqmail.com> >To: David Woolley <for...@david-woolley.me.uk>, > elecraft@mailman.qth.net >Subject: Re: [Elecraft] K3 - PSK31 - AGC/No AGC >Message-ID: <56316629.5000...@embarqmail.com> >Content-Type: text/plain; charset=windows-1252; format=flowed > >David, > >I do not understand your logic. >Let's divorce the AGC from the product detector for a moment. The K2 >takes the input to the AGC circuit from the IF and converts it to a >frequency that is removed from the IF signal. The AGC circuit produces >a DC voltage that is used to control the gain of the IF amplifier - period. >That has nothing to do with balanced or unbalanced - the output is a a >DC voltage which is applied to the IF amplifier to control its gain. > >That means that the only signals applied to the product detector are the >incoming signal (already controlled by the AGC) and the BFO. > >Yes, receivers of old did not use product detectors (mixers) but used a >diode detector, and the BFO signal was injected along with the IF signal >to produce the audio output. The BFO injection level was fixed, and >therefore the gain of the IF input to the detector had to be matched to >the BFO level for proper demodulation to occur. The result is that one >had to ride the RF Gain to make the levels of the IF signal and the BFO >work in harmony with each other. In addition, the AGC was developed >after the detector, so in those old receivers, it was best to turn off >the AGC. > >That is not true for receivers using a product detector. BFO pickup is >not a problem with a product detector as long as the output of the mixer >(product detector) is restricted to a bandpass that contains only the >audio frequencies (the input frequencies - BFO and IF - are rejected >leaving only the audio content). > >Those old operating habits (ride the RF Gain and set the AF Gain at max) >are still being used by some operators, but it is not necessary for >modern receivers which use product detectors - the K2 is included in >that list. > >73, >Don W3FPR > >On 10/28/2015 7:33 PM, David Woolley wrote: >> Although I hadn't noticed it before, I would say that design in the K2 >> is more about stability and DC offsets than anything to do with pick >> up of the BFO. The balanced demodulator and last two crystals deal >> with that. >> >> The old, basically AM sets, used high level, unbalanced detectors. >> That required more total gain from aerial to detector, although that >> might be split between RF and two IF frequencies. >> >> Balanced detectors can work with much lower level signals, which is >> particularly helpful for a single conversion design, like the K2. >> However, the AGC detector doesn't want to be balanced, and with a low >> level signal, would have a large DC offset, that might exceed the >> wanted rectified AGC, therefore additional gain is needed before the >> AGC detector. If this were done at the IF frequency, the gain from >> input to output at one frequency would be much greater, and >> proportionately less stray coupling would be needed to make the whole >> system oscillate. By shifting the frequency, which can be done at low >> signal levels, the design reduces the gain at any one frequency. >> >> The risk with doing all at one frequency is not pickup of the BFO at >> the input of the IF amplifier, but pickup of its own output. >> >> If there were leakage of the BFO it would get amplified just as much >> as if additional gain was tapped off at the same point and amplified >> at the original frequency. The design seems to rely on the balance of >> the detector and the two pole crystal filter, to stop the BFO getting >> into the AGC path, and not the difference in frequency. >> > > > >------------------------------ > >Message: 18 >Date: Wed, 28 Oct 2015 17:44:50 -0700 >From: Wayne Burdick <n...@elecraft.com> >To: Joe W2KJ <w...@bellsouth.net> >Cc: elecraft@mailman.qth.net >Subject: Re: [Elecraft] Icoms answer to the KX3?? >Message-ID: <9c1fc112-2aed-4f41-8cb3-ad09a928d...@elecraft.com> >Content-Type: text/plain; charset=us-ascii > >Joe W2KJ <w...@bellsouth.net> wrote: > >> Howdy Fellow Elecrafters: >> >> Saw something new from Icom called the IC7300. >> >> Looks like a direct conversion architecture ala the KX3 but larger in size, >> I believe. > >Based on Icom's published specs, by volume it is 7.5 times larger than the KX3. > >Wayne >N6KR > > > >------------------------------ > >Message: 19 >Date: Wed, 28 Oct 2015 20:19:46 -0500 >From: Bob McGraw - K4TAX <rmcg...@blomand.net> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] K3 - PSK31 - AGC/No AGC >Message-ID: <56317432.3060...@blomand.net> >Content-Type: text/plain; charset=windows-1252; format=flowed > >Don is absolutely correct. > >As many may know, I do assist hams with issues associated with many >different products here and elsewhere. The biggest issue I encounter is >the ham that says " well somebody told me to.... blah blah blah blah >......and it would work best". In many cases, nothing could be further >from the truth. I find today that many hams are more prone to have and >use old school thinking and methods trying to be used with today's >radios. I find this applies to many facets of ham radio equipment as >being used today. > >As I've told many, if you expect the radio to operate like a Kenwood, >ICOM or Yaesu, it darn well better say Kenwood, ICOM or Yaesu on the >front panel. Otherwise stated, learn to use the Elecraft radio >correctly in order to attain optimum performance, for indeed they do not >operate like the others. > >73 >Bob, K4TAX >K3S s/n 10163 > > >On 10/28/2015 7:19 PM, Don Wilhelm wrote: >> Those old operating habits (ride the RF Gain and set the AF Gain at >> max) are still being used by some operators, but it is not necessary >> for modern receivers which use product detectors - the K2 is included >> in that list. >> >> 73, >> Don W3FPR > > > > >------------------------------ > >Message: 20 >Date: Wed, 28 Oct 2015 18:47:38 -0700 >From: Fred Jensen <k6...@foothill.net> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] K3 - PSK31 - AGC/No AGC >Message-ID: <56317aba.5070...@foothill.net> >Content-Type: text/plain; charset=windows-1252; format=flowed > >How do I set the AGC on my loose coupler receiver? :-) I'm old, but >I've never used the RF Gain on my K3. > >73, > >Fred K6DGW >- Northern California Contest Club >- CU in the Cal QSO Party 1-2 Oct 2016 >- www.cqp.org > >On 10/28/2015 6:19 PM, Bob McGraw - K4TAX wrote: >> Don is absolutely correct. >> >> As many may know, I do assist hams with issues associated with many >> different products here and elsewhere. The biggest issue I encounter is >> the ham that says " well somebody told me to.... blah blah blah blah >> .....and it would work best". In many cases, nothing could be further >> from the truth. I find today that many hams are more prone to have and >> use old school thinking and methods trying to be used with today's >> radios. I find this applies to many facets of ham radio equipment as >> being used today. >> >> As I've told many, if you expect the radio to operate like a Kenwood, >> ICOM or Yaesu, it darn well better say Kenwood, ICOM or Yaesu on the >> front panel. Otherwise stated, learn to use the Elecraft radio >> correctly in order to attain optimum performance, for indeed they do not >> operate like the others. >> >> 73 >> Bob, K4TAX >> K3S s/n 10163 > > > >------------------------------ > >Message: 21 >Date: Wed, 28 Oct 2015 21:08:45 -0500 >From: Bob McGraw - K4TAX <rmcg...@blomand.net> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] K3 - PSK31 - AGC/No AGC >Message-ID: <56317fad.8000...@blomand.net> >Content-Type: text/plain; charset=windows-1252; format=flowed > >Back in 1923, in order to receive a signal, the following adjustments >must be made and possibly repeated to get the optimum performance (not a >simple matter and easily upset): The input coil (inside box) is adjusted >to resonate at the desired receiving frequency using the two tap >selectors on the front panel of the box.The inductance of the secondary >coil is set by its tapping switch and tuned by a capacitor to suit the >frequency being received. Moving the secondary coil in and out of the >primary (in the box) allows coupling to adjusted for maximum >performance. With coil pushed in, the sensitivity will be high and the >selectivity will be poor. The reverse occurs with the coil pulled out. > >73 >Bob, K4TAX > >On 10/28/2015 8:47 PM, Fred Jensen wrote: > >How do I set the AGC on my loose coupler receiver? > > > >------------------------------ > >Message: 22 >Date: Thu, 29 Oct 2015 08:15:05 +0000 (UTC) >From: Martin Storli - LA8OKA <arcticp...@yahoo.no> >To: "elecraft@mailman.qth.net" <elecraft@mailman.qth.net> >Subject: Re: [Elecraft] Icoms answer to the KX3?? >Message-ID: > <1717313154.7097159.1446106505116.javamail.ya...@mail.yahoo.com> >Content-Type: text/plain; charset=UTF-8 > >When it comes to RF architecture, the IC-7300 is nothing like the KX3, it's >actually a step ahead, because it's not a Direct Conversion, but a RF Direct >sampling?. >ICOM didn't follow Elecraft on this one. They rather follow FlexRadio, the >russian Expert Electronics and the italian Elad amongst other. So many are >going Down this road now, it's hard to tell who's first. >The KX3 wasn't the first Direct Conversion?SDR receiver with knobs either, >there where several smaler manufactures just prior to the KX3.But KX3 might >claim to be the first commersial success, but that is more to?due to?the >strong?Elecraft brand and the KX1 legassy than due to innovation.And, it's a >good transceiver, so it deserves the success regardless of the RF architecture >employed. >Best regards >Martin Storli LA8OKAOslo, Norway ?ARCTICPEAK's Radio pages! >http://www.arcticpeak.com/radio.htm > Fra: Joe W2KJ <w...@bellsouth.net> > Til: elecraft@mailman.qth.net > Sendt: Onsdag, 28. oktober 2015 23.48 > Emne: [Elecraft] Icoms answer to the KX3?? > >Howdy Fellow Elecrafters: > >Saw something new from Icom called the IC7300. > >Looks like a direct conversion architecture ala the KX3 but larger in size,? I >believe. > >The KX3 might have been the first such multi-band design with front panel >display, knobs. buttons, etc, similar to traditional superhet transceivers and >it appears that Icom is following the lead. > >Would love to see the technical specs on this new rig. > >??? ??? ??? 73, Joe W2KJ >??? ??? ??? KX3/KXPA100 >______________________________________________________________ >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 arcticp...@yahoo.no > > > > >------------------------------ > >Message: 23 >Date: Thu, 29 Oct 2015 08:20:28 -0000 >From: "Ian White" <gm3...@ifwtech.co.uk> >To: <elecraft@mailman.qth.net> >Subject: Re: [Elecraft] K3S In-Depth Review Coming Soon? >Message-ID: <006601d11222$b0e8a640$12b9f2c0$@co.uk> >Content-Type: text/plain; charset="us-ascii" > >Apologies once again - this message sent yesterday to G3RXQ was meant to >be copied to the whole group. > > >------------------------------------------ > >You are right, Stewart. > >Please cancel that whole paragraph about the KIO3B. Apologies to the >group for spreading my confusion worldwide. > > >73 from Ian GM3SEK > > > > >------------------------------ > >Message: 24 >Date: Thu, 29 Oct 2015 09:34:57 +0100 >From: Heinz B?rtschi <heinz.baerts...@bluewin.ch> >To: Martin Storli - LA8OKA <arcticp...@yahoo.no> >Cc: "elecraft@mailman.qth.net" <elecraft@mailman.qth.net> >Subject: Re: [Elecraft] Icoms answer to the KX3?? >Message-ID: <5d13c9f8-65a7-4747-adf3-e4a4f9c4d...@bluewin.ch> >Content-Type: text/plain; charset=us-ascii > >Am 29.10.2015 um 09:15 schrieb Martin Storli - LA8OKA <arcticp...@yahoo.no>: >> >> ... "The KX3 wasn't the first Direct Conversion SDR receiver with knobs >> either, there where several smaler manufactures just prior to the KX3." > >Yes, maybe the ADAT-200 designed by Hans HB9CBU was the very first such >transceiver. Enjoy! >http://www.adat.ch/index_e.html > >73, Heinz HB9BCB > > > > > >> Fra: Joe W2KJ <w...@bellsouth.net> >> Til: elecraft@mailman.qth.net >> Sendt: Onsdag, 28. oktober 2015 23.48 >> Emne: [Elecraft] Icoms answer to the KX3?? >> >> Howdy Fellow Elecrafters: >> >> Saw something new from Icom called the IC7300. >> >> Looks like a direct conversion architecture ala the KX3 but larger in size, >> I believe. >> >> The KX3 might have been the first such multi-band design with front panel >> display, knobs. buttons, etc, similar to traditional superhet transceivers >> and it appears that Icom is following the lead. >> >> Would love to see the technical specs on this new rig. >> >> 73, Joe W2KJ >> KX3/KXPA100 >> ______________________________________________________________ >> 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 arcticp...@yahoo.no >> >> >> >> ______________________________________________________________ >> 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 heinz.baerts...@bluewin.ch > > >------------------------------ > >Message: 25 >Date: Thu, 29 Oct 2015 07:51:53 -0400 >From: Peter Pauly <ppa...@gmail.com> >To: Elecraft Reflector <elecraft@mailman.qth.net> >Subject: [Elecraft] Which of these would make the best power supply > for the K3(S)? >Message-ID: > <cakxfwbsilv4+pam0pvfb88e-ypif1zej27jibs1g-fqjm9b...@mail.gmail.com> >Content-Type: text/plain; charset=UTF-8 > >I'm looking at the Meanwell power supplies because they are cheap and seem >to be well regarded. I've come up with these two choices, feel free to give >more suggestions of other models. I've seen talk on this reflector of >supplying more than 13.8V to the K3S so that's why I'm looking at the 15V >model. > >12V Model: Meanwell NES-350-12 >Voltage range 10-13.5V >29A > > >15V Model: Meanwell NES-350-15 >Voltage range 13.5-18V >23.2A > > >The 15 volt model would seem to be the obvious choice, except that it >doesn't supply the recommended 25 amps. The K3S manual says 22 amps typical >though. > >Is there another model Meanwell I should be looking at that has better >protection or filtering? > >I've already got an Astron switching power supply, the Meanwell would be a >second alternative. > > >------------------------------ > >Message: 26 >Date: Thu, 29 Oct 2015 08:07:46 -0400 >From: Gordon LaPoint <gordon.lapo...@gmail.com> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] KRC2 rs232 to cpu not working >Message-ID: <56320c12.7040...@gmail.com> >Content-Type: text/plain; charset=windows-1252; format=flowed > >All, > I found the problem. My serial cable had a broken wire on pin >2. I had used the serial cable on my KPA-500 and it was working. Must >have broken when I removed it from the system and used it to test the >KRC2. Thanks for all the pointers and help! Murphy is so busy at my QTH, >hope he leaves soon! > >Thank you, >Gordon - N1MGO > >On 10/25/2015 08:54 AM, Don Wilhelm wrote: >> John, >> >> Actually a standard serial cable can be connected to the KRC2 if >> jumpers W11 thru W20 are removed, no need to cut off wires in the cable. >> That information *is* in the plugging configuration charts. >> >> 73, >> Don W3FPR >> >> On 10/25/2015 8:43 AM, John K9UWA wrote: >>> >>> A simple statement in the KRC2 manual could have been added by Elecraft >>> stating. To Program your KRC2 to your K3 radio get a standard DB9 serial >>> cable. and CUT OFF all wires EXCEPT 2, 3 and 5. Mark the cable Program >>> KCR2 ONLY and save the cable for future use. I wonder how many >>> additional KRC2 boxes Elecraft could have sold over the last 4 years? >>> >>> >> >> ______________________________________________________________ >> 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 gordon.lapo...@gmail.com > > >-- >Gordon - N1MGO > > > >------------------------------ > >Message: 27 >Date: Thu, 29 Oct 2015 07:26:47 -0500 >From: Bob McGraw - K4TAX <rmcg...@blomand.net> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] Which of these would make the best power > supply for the K3(S)? >Message-ID: <56321087.7030...@blomand.net> >Content-Type: text/plain; charset=windows-1252; format=flowed > >An Astron SS-30M is a much better supply and will supply the required >current. It has excellent regulation and IS NOT a noise generator. >Plus it has a volt meter and amp meter on the front panel. > >73 >Bob, K4TAX >K3S s/n 10163 > >On 10/29/2015 6:51 AM, Peter Pauly wrote: >> I'm looking at the Meanwell power supplies because they are cheap and >> ........ > > > > >------------------------------ > >Message: 28 >Date: Thu, 29 Oct 2015 06:05:46 -0700 (MST) >From: Mike K2MK <k...@comcast.net> >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] Which of these would make the best power > supply for the K3(S)? >Message-ID: <1446123946333-7609688.p...@n2.nabble.com> >Content-Type: text/plain; charset=us-ascii > >Hi Peter, > >I bought the Astron RS-35M for my $4000 K3 in 2008. I've never turned it off >and I've never even given it a second thought. No fan, no RF noise, just >reliable DC. > >73, >Mike K2MK > > > >Peter Pauly wrote >> I'm looking at the Meanwell power supplies because they are cheap and seem >> to be well regarded. I've come up with these two choices, feel free to >> give >> more suggestions of other models. I've seen talk on this reflector of >> supplying more than 13.8V to the K3S so that's why I'm looking at the 15V >> model. >> >> 12V Model: Meanwell NES-350-12 >> Voltage range 10-13.5V >> 29A >> >> >> 15V Model: Meanwell NES-350-15 >> Voltage range 13.5-18V >> 23.2A >> >> >> The 15 volt model would seem to be the obvious choice, except that it >> doesn't supply the recommended 25 amps. The K3S manual says 22 amps >> typical >> though. >> >> Is there another model Meanwell I should be looking at that has better >> protection or filtering? >> >> I've already got an Astron switching power supply, the Meanwell would be a >> second alternative. > > > > > >-- >View this message in context: >http://elecraft.365791.n2.nabble.com/Which-of-these-would-make-the-best-power-supply-for-the-K3-S-tp7609685p7609688.html >Sent from the Elecraft mailing list archive at Nabble.com. > > >------------------------------ > >Message: 29 >Date: Thu, 29 Oct 2015 09:09:41 -0600 >From: frank <fr...@k5dkz.com> >To: elecraft@mailman.qth.net >Subject: [Elecraft] IMD and supply voltage >Message-ID: <20151029090941.cb6c6879f85ba959f9627...@k5dkz.com> >Content-Type: text/plain; charset=US-ASCII > >This subject keeps cropping up. Is this a serious issue ? > >I have heard that IMD improves by 10db with a one volt increase in supply >voltage. Is this really the case or just a measurement error? 10db is a >large difference. One volt is a small variation. > >What is the minimum acceptable IMD? How linear does the amp need to be? If >36db is better than 26db is 100db even better or just overkill? > >Are other solid state amplifier products similarly effected? > >What is the IMD performance of the K3S at 10 watts over a supply voltage >variation from 11 volts to 14.7 volts? I ask because I believe those ten >watts are generated by Dmos devices as well. Do these devices only misbehave >with varying supply voltage at higher (100w) power levels and lower supply >voltages? > >Should I wait to purchase a K3S until this issue is resolved? (Assuming this >is a valid issue) > >Back in the good old days we used to solve problems. Today we don't have >problems, just issues. > >-- >Frank - K5DKZ >KX3 - 7550 >PX3 - 1143 >KXPA100 - 1566 > > >------------------------------ > >Message: 30 >Date: Thu, 29 Oct 2015 10:41:25 -0400 >From: Don Wilhelm <w3...@embarqmail.com> >To: frank <fr...@k5dkz.com>, elecraft@mailman.qth.net >Subject: Re: [Elecraft] IMD and supply voltage >Message-ID: <56323015.6050...@embarqmail.com> >Content-Type: text/plain; charset=windows-1252; format=flowed > >Frank, > >I think the "issue" is one of some hams wanting to make what is good >already into something better. >If you look closely you should discover that this is a situation common >to *all* 100 watt class amplifiers that are supposed to run on a nominal >'12 volt' supply. That voltage level is chosen because it is common for >vehicle batteries, so most transceivers are designed around that voltage >- the K3S is just one of those. > >Using an increased voltage power supply will drastically reduce the >transmit IMD, and that is true for all those 100 watt class amplifiers. >Bottom line is that I don't think it will be "fixed" in the K3S - I >don't think it can be fixed in any of the 100 watt class solid state >amplifiers. > >So the thing to do is to run the power supply voltage up to near 15 >volts (but not above), and do not operate with "all knobs to the right". >Many hams seen to want to squeeze all the power output that they can >from a transceiver, so you will put a cleaner signal on the air if you >set the power to 100 watts rather than trying to squeeze that last 20 >extra watts out of an amplifier. > >73, >Don W3FPR > >On 10/29/2015 11:09 AM, frank wrote: >> This subject keeps cropping up. Is this a serious issue ? >> >> I have heard that IMD improves by 10db with a one volt increase in supply >> voltage. Is this really the case or just a measurement error? 10db is a >> large difference. One volt is a small variation. >> >> What is the minimum acceptable IMD? How linear does the amp need to be? If >> 36db is better than 26db is 100db even better or just overkill? >> >> Are other solid state amplifier products similarly effected? >> >> What is the IMD performance of the K3S at 10 watts over a supply voltage >> variation from 11 volts to 14.7 volts? I ask because I believe those ten >> watts are generated by Dmos devices as well. Do these devices only >> misbehave with varying supply voltage at higher (100w) power levels and >> lower supply voltages? >> >> Should I wait to purchase a K3S until this issue is resolved? (Assuming >> this is a valid issue) >> >> > > > >------------------------------ > >Subject: Digest Footer > >_______________________________________________ >Elecraft mailing list >Post to: Elecraft@mailman.qth.net >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 138, Issue 40 >***************************************** ______________________________________________________________ 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
