[Elecraft] return to original frequency after using memory
As I am listening/working at a certain frequency I sometimes use one of the memory buttons to check another frequency. But how do I then return to my original frequency? My ‘other’ rigs go to ‘memory’ or ‘memory tuning mode’ when a memory frequency is accessed. Cancelling memory mode brings you back to the original frequency. How does that work with the K3? Do I miss a trick? 73 Miles PA3CVV ___ 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] Re: K3 Caution when using an external monaural speaker
Wayne I will be doing all the mods for Christmas. Hope you can give us the info really soon so I don't have to take the K3 apart again. Can you just point to the circuit and tell us what you intend ahead of the official mod instruction? 73 David G3UNA To this end, we're working on a very simple modification to the KIO3 audio daughter board. This will be the subject of a modification document soon, and is already being phased into production. 73, Wayne N6KR ___ 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] Re: K3 Caution when using an external monaural speaker
Hi David, Lyle, KK7P (who designed the KIO3 board set) will create an application note and post it as soon as possible. The short version is: put 1/8-W (or larger), 470-ohm resistors from each speaker output to ground. (The actual value isn't critical; anything from 330 to 1000 ohms would probably work just as well.) This can be done conveniently on the KIO3's audio daughter board, at its single-row, right-angle male connector. Technical details: The resistors hold the (-) leads of the AF amp's large electrolytic coupling capacitors at ground potential (RF board, C2 and C3, 470 uF). Thus if you accidentally ground *either* of the speaker outputs, you'll be changing only the AC load to the amplifier -- not the DC voltage. This means you won't get a big current spike backward, into the AF amp's output, through the electrolytic; that's what we think can damage the chip, because the caps can dump a lot of energy very quickly. An astute observer would note that a similar current spike should be generated on power-up, if a short at either speaker jack was present at that time. But the AF amp chip protects itself during power-up, limiting current at its output pins. If it didn't, even the presence of a low-Z speaker might cause chip damage. With the resistors in place, Lyle repeatedly shoved a mono plug into the speaker jack, under both small and large-signal AF output conditions. He couldn't break the amp chip. Credit for this bleeder resistor idea goes to another one of our staff engineers, Bob, N6CM. Lyle and I both wish we'd thought of it. 73, Wayne N6KR On Dec 20, 2008, at 12:59 AM, David Cutter wrote: Wayne I will be doing all the mods for Christmas. Hope you can give us the info really soon so I don't have to take the K3 apart again. Can you just point to the circuit and tell us what you intend ahead of the official mod instruction? 73 David G3UNA To this end, we're working on a very simple modification to the KIO3 audio daughter board. This will be the subject of a modification document soon, and is already being phased into production. 73, Wayne N6KR --- 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
[Elecraft] K3 Hardware Updates
Well I finally bit the bullet and did the audio- and ALC-mod hardware updates to my SN308 K3, including adding pull-ups to the band-data outputs (optional mod in the ALC instructions). I'd already done the HAGC and CW rise-time mod a few months ago. While I don't use ALC with my K3/ALS-600, I wanted everything up to date. Everything went smoothly, as the Elecraft instructions are excellant. Time spent was probably about two hours, but I took my time. I wanted to pass on my experience with K6LL's suggestion about making the L4 front panel mod from the side of the unit without having to remove the front panel. I found this surprisingly easy to do, and it certainly saved time. So - Now after two mod processes plus installation of the KRX3, my cabinet screws are starting to show a little wear. Maybe Elecraft should offer a small kit that just includes replacement cabinet screws (top-and side-cover especially) for those of us who keep taking our K3s apart. Phil - AD5X ___ 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 Hardware Updates
I second that 73 de M0XDF, K3 #174 -- The problem with being sure that God is on your side is that you can't change your mind, because God sure isn't going to change His. -Roger Ebert, film-critic (1942- ) On 20 Dec 2008, at 11:53, Phil Debbie Salas wrote: So - Now after two mod processes plus installation of the KRX3, my cabinet screws are starting to show a little wear. Maybe Elecraft should offer a small kit that just includes replacement cabinet screws (top-and side-cover especially) for those of us who keep taking our K3s apart. ___ 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 Hardware Updates
Phil amp; Debbie Salas wrote: So - Now after two mod processes plus installation of the KRX3, my cabinet screws are starting to show a little wear. Maybe Elecraft should offer a small kit that just includes replacement cabinet screws (top-and side-cover especially) for those of us who keep taking our K3s apart. I believe both the Pan Head and Flat Head chassis screws are already set up on the Spare Parts and Mod Kits page under Miscellaneous, but you may want to confirm with Elecraft first: CHSCRKT Chassis Screws, Black, 4-40 x 3/16 Pan Head (qty 20 per package) 2.00 FLTSCRKTFlat Head Undercut 4-40 chassis screws Used on the K1 (qty 10 per package) 1.00 If you build additional units, you'll soon have a collection of spares! 73, Bill -- View this message in context: http://n2.nabble.com/K3-Hardware-Updates-tp1681557p1681730.html Sent from the Elecraft mailing list archive at Nabble.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 Hardware Updates
I believe both the Pan Head and Flat Head chassis screws are already set up on the Spare Parts and Mod Kits page under Miscellaneous, VirtualReality I tried to FTP the the above updates, but it looks like one can't download the screw packages and install them with the K3 Utility. /VirtualReality Now that really would be a software defined radio. ;-) K3 #67 has been transported and apart so often, that it looks bit wizen. toby PS: ___ 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 Hardware Updates
So - Now after two mod processes plus installation of the KRX3, my cabinet screws are starting to show a little wear. Maybe Elecraft should offer a small kit that just includes replacement cabinet screws (top-and side-cover especially) for those of us who keep taking our K3s apart. My unit, s/n 2, has been apart more than together. I find careful use of a black sharpie hides screw wear pretty well! Getting ready for the Blizzard of '08 later today, Lyle KK7P ___ 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] N2CQ QRP Contest Calendar: Dec 20 2008 - Jan 19 2009
~ N2CQ QRP CONTEST CALENDAR December 20, 2008 - January 19, 2009 ~ 80 METER FOXHUNT (CW) *** QRP Contest *** Each Tuesday Thru Mar 24 9 PM to 10:29 PM Eastern Time USA Info: http://www.qrpfoxhunt.org ~ 40 METER FOXHUNT (CW) *** QRP Contest *** Each Thursday Thru Mar 26 9 PM to 10:29 PM Eastern Time USA Info: http://www.qrpfoxhunt.org/ ~ OK DX RTTY Contest Dec 20, z to 2400z Rules: http://www.crk.cz/ENG/DXCONTE.HTM ~ Croatian CW Contest (CW) ... QRP Category Dec 20, 1400z to Dec 21, 1400z Rules: http://www.9acw.org/rules.html ~ Holiday Spirits Homebrew Sprint (CW) *** QRP Contest *** Dec 21, 2000z to 2359z Rules: http://www.qrparci.org ~ RUN FOR THE BACON (CW) *** QRP CONTEST *** EST: Dec 21, 9 PM to 11 PM UTC: Dec 22, 0200z 0400z Rules: http://www.fpqrp.com/ ~ SKCC Sprint (Straight Key CW) ... QRP Awards Dec 24, z to 0200z Rules: http://www.skccgroup.com/sprint/sks/ ~ RAC Canada Winter Contest (All) ... QRP Category Dec 27, z to 2359z Rules: http://www.rac.ca/service/contesting/ ~ R A E M Contest .. Low Power category Dec 27, 0200z to 0959z Rules: http://www.srr.ru/CONTEST/cup_raem_engl_07.php ~ Original QRP Contest ... QRP Category Dec 27, 1500z to Dec 28, 1500z Rules: http://www.qrpcc.de/contestrules/oqrpr.html ~ Stew Perry (W1BB) Topband Distance Challenge (CW) ... QRP Category Dec 27, 1500z to Dec 28, 1500z Rules: http://web.jzap.com/k7rat/stew.html ~ MQFD Monthly Sprint (CW/PH/Digital) *** QRP Contest *** Dec 27, 1800z to 2200z Rules: http://w2agn.net/mqfdsprint.html ~ 070 CLUB QRP DX SCRAMBLE (PSK31) ... QRP Contest! Dec 28,z to 2400z Rules: http://www.podxs070.com ~ 80 METER FOXHUNT (CW) *** QRP Contest *** Each Tuesday to Mar 24 9 PM to 10:29 PM Eastern Time USA Info: http://www.qrpfoxhunt.org/ ~ 40 METER FOXHUNT (CW) *** QRP Contest *** Each Thursday to March 26 9 PM to 10:29 PM Eastern Time USA Info: http://www.qrpfoxhunt.org/ ~ Straight Key Night (CW) UTC: Jan 1, z to 2400z Info: http://www.arrl.org/contests/rules/2009/skn.html ~ AGB New Year SnowBall Contest (80M CW/SSB) ...QRP Category Jan 1, z to 0100z Rules: http://www.ev5agb.com/contest/agb_nysb.htm ~ AGCW Happy New Year Contest (CW)...QRP Category Jan 1, 0900z to 1200z Rules: http://www.agcw.org/en/?Contests:Happy_New_Year_Contest ~ AGCW VHF/UHF CW Contest ... QRP Category Jan 1, 1600z to 1900z (144 Mhz) Jan 1, 1900z to 2100z (432 Mhz) Rules: http://www.agcw.org/en/?Contests:VHF-UHF_Contest ~ QRPARCI Pet Rock Celebration (CW) *** QRP Contest *** Jan 3, 1500z to 1800z (Bonus points for rockbound equipment) Rules: http://www.qrparci.org/ ~ ARRL RTTY Roundup ... = 150W Category Jan 3, 1800z to Jan 4, 2400z Rules: http://www.arrl.org/contests/rules/2009/rtty.html ~ EUCW 160 Meter Contest (CW) ... QRP Category Jan 3, 2000z to 2300z and Jan 4, 0400z to 0700z Rules: http://www.agcw.org/eucw/eu160.html ~ Adventure Radio Spartan Sprint (CW) ... QRP Contest! EST: Jan 5, 9 PM to 11 PM (First Monday each month) UTC: Jan 6, 0200z to 0400z Rules: http://arsqrp.pbwiki.com:80/Spartan+Sprints ~ 070 Club PSKFEST Contest ... QRP Category Jan 10, z to 2400z Rules: http://www.podxs070.com//contests/pskfest_rules.htm ~ Michigan QRP Club Contest (CW) ... QRP Contest! Jan 10, 1200z to Jan 11, 2359z Rules: http://www.qsl.net/miqrpclub/contest.html ~ North American QSO Party (CW) (100w max. QRP Entries Noted) Jan 10,
RE: [Elecraft] K3 Hardware Updates
Someday I'll be sitting at the operating desk preparing to call a rare DX station when my new Elecraft K22 will suddenly fade into nothingness in front of my eyes just as a disembodied voice comes from the phones, Finished installing automatic updates. Starting mandatory reboot. It sounds like your K3 is a lot like ol' S/N 10 here. It's getting harder and harder to make it look 'fresh out of the box' for updated assembly manual photos. But they're both proof that one can disassemble these rigs again and again and they'll take a lickin' and keep on ticken' as the old Timex watch commercials used to say. Ron AC7AC -Original Message- I believe both the Pan Head and Flat Head chassis screws are already set up on the Spare Parts and Mod Kits page under Miscellaneous, VirtualReality I tried to FTP the the above updates, but it looks like one can't download the screw packages and install them with the K3 Utility. /VirtualReality Now that really would be a software defined radio. ;-) K3 #67 has been transported and apart so often, that it looks bit wizen. toby ___ 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 Hardware Updates
A key objective of the procedures is to make sure everyone with normal skills and tools can do the job cleanly and correctly the first time. It's the same trade-off used for important tasks anywhere, whether the worker is an astronaut working on the ISS, a surgeon in the operating room, or an AE mechanic rebuilding an aircraft engine. Removing a few screws and pulling off the front panel assembly allows you to install the jumper without working half-blind from the side, trying to avoid damaging the DSP board or causing an unseen solder bridge. For those who haven't tried it, removing and replacing the front panel assembly is easy to do - especially once it's been mounted. The toughest time is the first time the front panel is mounted when all the connectors are still brand new and extra tight. But even then it goes smoothly if you follow the directions. Ron AC7AC -Original Message- I wanted to pass on my experience with K6LL's suggestion about making the L4 front panel mod from the side of the unit without having to remove the front panel. I found this surprisingly easy to do, and it certainly saved time. So - Now after two mod processes plus installation of the KRX3, my cabinet screws are starting to show a little wear. Maybe Elecraft should offer a small kit that just includes replacement cabinet screws (top-and side-cover especially) for those of us who keep taking our K3s apart. Phil - AD5X .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
[Elecraft] RTTY using LSB versus AFSK-A
I'm trying out RTTY for the first time today during the OK RTTY contest in preparation for the upcoming RTTY RU in a couple of weeks. I have used MixW running AFSK for years on my FT1000D to the extent that I got quite used to the visual signal spotting aspects of the waterfall display. I normally search and pounce rather than send CQ so I'm always tuning looking for new signals on the waterfall. Using LSB on the K3 with a filter width of 1.5KHz is working perfectly. I just point the mouse at any signal that I see on the waterfall in that bandwidth and transmit. I know I'm supposed to use the Data mode with dual passband but the bandwidth is so narrow I hardly hear any signal until I'm right on top of it. And the waterfall is so narrow I barely see the signal unless I tune very slowly with the finest tuning resolution. Once I'm on top of a signal it too works perfectly. My impression is that the Data mode with dual passband would be better for a station sending CQ and then very finely tuning to pick out the calling stations. Is that a valid assumption or have I just not mastered the art of using the Data mode. Or does the problem reside in my decision to use MixW. Mike K2MK ___ 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] RTTY using LSB versus AFSK-A
In DATA AFSK you can press the PB2 button to toggle the dual passband filter on and off. This will open up your waterfall display when the dual narrow filter is not in use. DATA A is also perfectly valid for RTTY operation. 73, Lyle KK7P ___ 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] RTTY using LSB versus AFSK-A
Lyle Johnson wrote: In DATA AFSK you can press the PB2 button to toggle the dual passband filter on and off. This will open up your waterfall display when the dual narrow filter is not in use. DATA A is also perfectly valid for RTTY operation. I was also playing the the OK contest last night, and most of the time ran with a 400Hz filter without the PB2 on, for both run and sp. RU might be a different story, as I expect the bands will be crowded. With PB2 off, you can always open up the width control if you're looking for targets. I set up MMTTY so that it was centered on the same frequency as the K3's filter when I hit NORM, so I could get back there quickly, but found I didn't need to do that. Other reasons to use AFSK A or DATA A modes include that you'll probably want to configure those to use line-in with an appropriate level set, whereas LSB would use a mic or headset, and you want to have compression, etc, off in DATA mode too. ~Iain / N6ML ___ 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 Hardware Updates
Hi Ron, Someday I'll be sitting at the operating desk preparing to call a rare DX station when my new Elecraft K22 will suddenly fade into nothingness in front of my eyes just as a disembodied voice comes from the phones, Finished installing automatic updates. Starting mandatory reboot. Of course with KWAYNE22 or KERIC22 options it will fade to a hologram of Wayne or Eric, who would then say Finished installing automatic updates... Special customers also have a choice of the KLISA22 or any other Elecraft fave they might have. ;-) For the not so faint of heart, a third party will offer a KCATCH22 add on... vy 73 de toby ___ 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] Re: RTTY using LSB versus AFSK-A
Yes I just tried AFSK-A with the DPB filter off and the bandwidth opened up and it seems to provide the same comfort level that I had on LSB. Aside from the advantages of having the levels set differently from LSB and the compression turned off is there a received signal advantage to using Data Mode instead of LSB assuming both bandwidths are set the same. Mike K2MK ___ 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] Contest use of KRX3
Now that I have the KRX3 installed and have been playing with it a bit... It is quite a new thing for me to have a sub RX that is useable as the run RX or as an SO2V search pounce RX with good selectivity. I would be interested in knowing how others have used the KRX3 in a CW contest. One specific question aside from the general question: if I am still working the run frequency and have taken the sub RX off the run frequency (SO2V) for mults, have a weak DX station in the sub RX narrow filter and I want to call higher or lower to work the pile-up, can I use the XIT based upon the sub RX frequency? If I do BSET and then XIT it just clears the BSET and does nothing. Can this be done from the K3 front panel or can it be done somehow from a logging program with sent commands? 73, Guy. -- View this message in context: http://n2.nabble.com/Contest-use-of-KRX3-tp1682273p1682273.html Sent from the Elecraft mailing list archive at Nabble.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
[Elecraft] FS: K2 and/or KPA-100 + KAT-100
Price reduced, K2 with almost all options and/or KPA-100 + KAT-100 in EC-2 case for sale.Available separately or as a complete station, additional savings if you purchase all of it at one time. Several additional K2 accessories available separately, with or without the base rig. Professionally assembled and aligned, everything works per specifications. Non-smoker, like new appearance, no dents, dings, scratches, etc. Priced significantly less than kit price. Shipped prepaid via FedEx to any of the 50 USA states. Contact me off list for complete details. - Jim, KL7CC ___ 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] Re: RTTY using LSB versus AFSK-A
Mike K2MK wrote: Yes I just tried AFSK-A with the DPB filter off and the bandwidth opened up and it seems to provide the same comfort level that I had on LSB. Aside from the advantages of having the levels set differently from LSB and the compression turned off is there a received signal advantage to using Data Mode instead of LSB assuming both bandwidths are set the same. I doubt whether there is any received signal advantage, but there are several operational differences: In AFSK A (or FSK D), if you use the tones chosen using the PITCH control the dial display and most software will both display, log and spot the mark frequency, in agreement with standard amateur procedure. If you use LSB or DATA A, the dial displays the suppressed carrier frequency, which is not the frequency you are transmitting on. You or your software will have to add (DATA A) or subtract (LSB) the audio mark frequency from the radio's dial display to get the correct frequency for spotting and logging. In DATA A and LSB you can use whatever audio frequencies you want to within the bandpass, whereas in AFSK A you may want to (and in FSK D you must) realign your tuning so that the signal you are working is on the chosen audio frequency. However, this is not really all that limiting - if you find you need to narrow the bandwidth because of QRM, you will probably want to be on that frequency anyway, because that is where the DSP filters will be centred. Some software (including MixW) has an Align or Opt feature that will do this for you automatically, i.e. if you click on a signal in the waterfall, you can click on the Align button and it will retune the radio so that signal is placed on the chosen audio frequency. The K3's SPOT tuning aid works properly for RTTY in AFSK A and FSK D (again, assuming you have the PITCH set to the tones you are using) - it doesn't work at all in LSB, and in DATA A it produces the CW sidetone, which is very unlikely to be appropriate for RTTY. The K3's CWT and TEXT DEC features also work for RTTY in AFSK A and FSK D, but not with the other mode choices. You mentioned that you are using MixW. MixW is a bit trickier to configure for the K3 than for some other radios. Here, FWIW, are the settings I use in MixW for the K3: Under Configure - TRCVR PTT/CAT, I have CAT set to KENWOOD and the Model set to All Kenwoods (*not* to Elecraft K2, which doesn't work very well with the K3). The only check boxes I have checked are CW is LSB and AFSK in place of FSK. The CW pitch setting is the same as the K3's sidetone pitch for CW. I have the Default digi mode set to RTTY (this selects the K3's DATA mode, but does not distinguish among the four DATA modes - more on that later). Under the Details button, I have the port set to 38400, 8, None, 2, RTS set to PTT and DTR set to Always Off (I use a Winkey for CW). Correspondingly, the K3's CONFIG:PTT-KEY is set to rtS-OFF. In order to set the data submode, I make use of MixW's OnStartMode macro in the Macros for this mode mode-specific .mc file for each of the modes that I use. For RTTY, my OnStartMode macro contains CATCMD:MD6;DT1;PC100INVON . This sets the K3 to DATA mode, submode AFSK A, power 100 watts. It also sets MixW to Inverted RTTY (MixW's default is USB, but AFSK A is LSB). The View - Spectrum display setting should be either RF,LSB or AUTO. You will need to set the TX and RX frequencies under Mode settings to your centre frequency (2210 Hz if the K3's pitch is set to 2125-170, 1530 if it is set to 1445-170, 1360 if it is set to 1275-170, and 1000 if it is set to 915-170). To log the mark frequency, you should set the CAT correction for Digi to the negative of your chosen centre frequency. This will ensure that logged frequencies and cluster spots will be correct, but the waterfall/spectrum display frequency legend will display the centre frequency, not the actual frequencies of the traces in the waterfall. This 85 Hz offset occurs with all radios; it is caused by the fact that for some reason MixW is programmed to use the centre frequency instead of the mark frequency. You can adjust the CAT correction so that the waterfall shows the correct frequencies, but then the log and cluster spots will be off by 85 Hz. I prefer to log the correct frequencies and live with the error in the waterfall. I program one of my MixW macro buttons to contain ALIGN: where is the centre frequency. This button is what I use to snap a signal back to the chosen pitch at the centre of the filter bandpass. I have this button defined in my mode-specific macros for RTTY, because I use a different align value in other modes. For PSK31, the first change is to reset MixW's CAT correction for Digi back to 0. I have not found any way to automate this change, unfortunately. You will also have to set MixW's View - Spectrum display setting to RF,USB , because MixW's AUTO setting thinks the K3 is in LSB in DATA mode, whereas DATA A is actually USB. My PSK31
Re: [Elecraft] K3 Hardware Updates
Although a little screw wear is inevitable, the wear will be much less if a proper fitting screwdriver is used. The screwdriver points do wear after a while, so the purchase of a good new #1 phillips screwdriver is my recommendation. When the screwdriver point will no longer hold a screw securely, I believe it is time to purchase a new one. A good screwdriver point will hold a new chassis screw when the shaft is more than 15 degrees off a vertical position (who needs a screwholder or magnetic screwdriver if the tip is good?). I have found Excelite screwdrivers in general are good, and I have also found good ones at Ace Hardware. 73, Don W3FPR Lyle Johnson wrote: So - Now after two mod processes plus installation of the KRX3, my cabinet screws are starting to show a little wear. Maybe Elecraft should offer a small kit that just includes replacement cabinet screws (top-and side-cover especially) for those of us who keep taking our K3s apart. My unit, s/n 2, has been apart more than together. I find careful use of a black sharpie hides screw wear pretty well! Getting ready for the Blizzard of '08 later today, Lyle KK7P ___ 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 Hardware Updates...TNX for hint
Thanks to the G; whomever it was,,, for the hint on the removal of the choke ( audio output mod). That was to turn the set upside down ... use my fantastic solder suckerthen drop the old part into the set . This rather than having to remove the 2ndRX to get to that choke. Then put the new part on the bottom. ... a 10 minute job. (yes I remembered to get the old part out.) It actually fell out on the table. bill ___ 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] Re: RTTY using LSB versus AFSK-A
Well I'm really glad I posted this question. With the contest running I was able to try the suggestions and I've learned a lot. I'm now using the data mode AFSK A at a wider bandwidth when activity is light. I can narrow the bandwidth as activity increases. I implemented settings in MixW based on VE3KI's suggestions which allows me to pick a signal on the waterfall off of center frequency and then using an align macro button I can bring that signal into the center of the passband. Then if conditions require I can press the K3 dual passband button to optimize the bandwidth for that one signal. So I'm basically using MixW to autospot the signal using its AFC and then move the signal into the center of the K3 filter passband. I suppose it would be better if I fully understood what I was doing. But why press my luck. Mike K2MK ___ 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] Reminder - UK Elecraft net Sundays 1000 local, 3630 KHz
The frequency is plus or minus the QRM. Note the start time of 1000 hours to try and minimise European QRM. 73 Dave, G4AON K3/100, Acom 1000, dipole ___ 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] k3 matching filters
I received the KRX3 and the DVR today and am about to upgrade my k3. I am using the 2.7 if roofing filter in the main unit and requested and paid for a matching filter for the sub receiver. The main receiver offset is -.97 but the new 2.k filter is marked -.93. My question is are these a match or did I get the wrong part? I would like to know before I install things because I would like not to have to redo the installation if the part is wrong. Also its the week-end before Christmas, and this would be a nice project for me over the Christmas holidays as we are shut down from work until 5 January. Can anyone help me out? -Bill AA1O k3 287 k2 1740 ___ 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] OT: new SS amps
I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? de Doug KR2Q I have no vested interest in this company. ___ 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 matching filters
I just completed the same installation Bill. I bought an additional 500 Hz filter and paid to match two filters. They both matched exactly to my original filters. My installation went pretty well. My DVR seems to work, but I have not been able to find any instructions for operating. Maybe we are supposed to experiment and find out. I installed the DVR first then the KRX-3. I was surprised to learn that the SO239 and the BNC connectors cannot both be connected at one time. There is only one input to the receiver. (Maybe everyone else knew it, but I didn't). My KRX-3 kit said to install the second DSP board with one nylon and two steel screws. The DVR kit gave me two more nylon screws with instructions to replace the steel screws in the DSP so I used the nylon screws. It looks like very small clearance for the screw heads so apparently some people have had shorts. Good luck with your installation. The second receiver is interesting. I plugged in some surplus Labtec computer speakers which seem to work well except that their plug is a little too small for the K3 jack. I remember some posts about that several months ago. I need to dig them out and see what kind of plugs I need to buy for replacement. Willis 'Cookie' Cooke K5EWJ --- On Sat, 12/20/08, aa1o aa1o.ra...@comcast.net wrote: From: aa1o aa1o.ra...@comcast.net Subject: [Elecraft] k3 matching filters To: elecraft@mailman.qth.net Date: Saturday, December 20, 2008, 2:30 PM I received the KRX3 and the DVR today and am about to upgrade my k3. I am using the 2.7 if roofing filter in the main unit and requested and paid for a matching filter for the sub receiver. The main receiver offset is -.97 but the new 2.k filter is marked -.93. My question is are these a match or did I get the wrong part? I would like to know before I install things because I would like not to have to redo the installation if the part is wrong. Also its the week-end before Christmas, and this would be a nice project for me over the Christmas holidays as we are shut down from work until 5 January. Can anyone help me out? -Bill AA1O k3 287 k2 1740 ___ 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
[Elecraft] K3: RX dead, need help
Guys, i need your advice. At our Clubstation, while i was on 40m with the K3 and a Dipole, another guy transmitted with the 2nd setup, a TS-850 / TL 922 / vertical-ant on 80m. I saw a HI RFI flashing and the rx went deaf. Resetting the K3 did not help, also shorting out the gas-discharge diode on the KANT3-board. The RX sounds like there is no antenna connected, there is noise, but no signals. Help! Martin -- 73, DM4iM K2 #2706 ___ 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] Dual PB
Out of curiosity, is the dual PB done in IF or audio? Dan - N3NDHappy Holidays ___ 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] K3, MMTTY, Micro Keyer, laptop
Cannot get this set up to run FSK properly. Transmits fine. Receives and prints on the K3 display fine. The problem is printing received signals on MMTTY screen. Only prints gibberish. Any suggestions out there? 73 Bob K4LW___ 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 matching filters
...My DVR seems to work, but I have not been able to find any instructions for operating. From the latest beta firmware release notes [with slight editorial from me ]: Support for Digital Voice Recorder option (KDVR3): Note: The following information is more accurate than the DVR instructions in the K3 rev D owner’s manual. * DVR ICON: The DVR icon (dual arrows--above the S-meter) turns on whenever the DVR is in use. The icon flashes slowly during all record operations, and quickly during play. * DVR TX MESSAGES: Message record, play and repeat are functional. (Message chaining will be added in a subsequent release.) To start voice message record, tap REC, then tap M1-M4. Record will start immediately. Tap M1-M4 again to stop recording. To play a voice message, tap M1-M4. To repeat a voice message (e.g., a CQ), *hold* M1-M4 rather than tap. Message play or repeat can be cancelled at any time by tapping REC. [ note: be sure the MIC Gain is set for 5 bars of ALC on voice peaks to get the recording level correct.] * DVR RX LOOP: Hold AF REC to start receive-audio recording. Hold AF REC again to stop record. Up to 90 seconds of audio can be recorded; beyond this, earlier audio will be overwritten. Hold AF PLAY to start playback; press any switch to stop. VFO B will show the playback position in seconds, relative to the most-recently recorded audio segment. During PLAY, you can move forward/backward through RX audio loop buffer by rotating VFO B. An asterisk (*) beside the seconds counter shows the extent of the most recently recorded segment. Note: It is OK to record received audio continuously; this might be useful as a way of catching audio events that you wish to examine later. Record will continue even if you transmit. However, at present, silence is recorded for the duration of any transmission. * DVR RX LOOP PLAY IN TX MODE: First, enter voice transmit mode by holding PTT or tapping XMIT. Then hold AF PLAY to start playback, and press any switch to stop. CMP (speech compression) is automatically disabled. Note: Playback volume of the RX loop buffer during TX mode is not yet adjustable. --- 73, Lyle KK7P ___ 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] OT: new SS amps
What catches my eye is that comparing the amps on page 1 and page 9, you have to pay $2,000 more for an additional 1.7 dB of gain with the amp on page 9. Sure. you have to know how to adjust an amp and actually tune the one on page 1 whereas the one on page 9 is no tuning (assuming the antenna is tuned or you do the tuning with an external tuner). I guess that's significant to the hard-core contester, but for that convenience along with the 1.7 dB gain you must pay $2,000 for those who demand the ability to QSY across the band or between bands instantly, or who want to operate their station remotely through a computer. Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of DOUGLAS ZWIEBEL Sent: Saturday, December 20, 2008 2:30 PM To: Elecraft Reflector Subject: [Elecraft] OT: new SS amps I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? de Doug KR2Q ___ 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] ALC mod, Stereo speaker mod, pull-up resistor mod
I hesitate to write this for fear of scaring off some potential modifiers, but the story is good and positive. I did all 3 of these mods today. (The stereo speaker mod was outlined in a post from Wayne). After reassembly the radio worked fine and I was able to set the amplifier ALC just right. Then, after 3 hours, funny things happened. I could not change frequency. I could not turn off the K3. After disconnecting the power supply, the K3 came on with an ERR PTT message. Looked it up in the manual. Implicates the KIO3, where I had just made modifications. I easily isolated the problem to the digital IO board. Scanning the digital IO board with my illuminated magnifier I initially saw nothing. Then, a faint shiny speck showed up on one of the 8 pin surface mount chips that was shorting two pins. The offending speck was easily removed. It had obviously been created during my mod work, and took 3 hours of aging before it would short out the pins, creating the problem. I usually brush my circuit boards with a tooth brush after soldering to them. I did not do that this time. I will do it next time. All is well. Merry Christmas/Happy Holiday Season to all Elecrafters. Monty K2DLJ___ 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 matching filters
Thanks Toby, I emailed Katie but she is on vacation. I thought perhaps someone in the design group , Eric, Wayne, or Lyle would know about the filters. -Bill AA1O - Original Message - From: Toby Deinhardt dj7...@muenchen-mail.de To: aa1o aa1o.ra...@comcast.net Sent: Saturday, December 20, 2008 6:52 PM Subject: Re: [Elecraft] k3 matching filters Hi, The main receiver offset is -.97 but the new 2.k filter is marked -.93. My question is are these a match or did I get the wrong part? Doesn't sound like it. I'd double check with Elecraft if I were you. vy 73 de toby ___ 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 matching filters
The main receiver offset is -.97 but the new 2.k filter is marked -.93. My question is are these a match or did I get the wrong part? I think you may have received the wrong filter. At this point, I'd install the new filter in the KRX3, but set the Main and KRX3 offsets to -0.95 (split the difference). 20 Hz is not going to make a practical difference in any operational sense that come sot mind. You can check with Aptos to see about swapping the filter. If the new filter is in the KRX3, it will be the easier one to swap out later. Sorry about the error. I hope you get a lot of enjoyment and use out of the KRX3. If you have a second antenna, or a length of wire laying around that you can pretend is a second antenna, you are likely to find Diversity reception a real eye-opener (or is that a band opener?) 73 and Happy Holidays, Lyle KK7P ___ 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 matching filters
Thanks Lyle, I will go ahead as you suggest. 73 and Happy Holidays to you and your family -Bill AA1O - Original Message - From: Lyle Johnson k...@wavecable.com To: aa1o aa1o.ra...@comcast.net Cc: elecraft@mailman.qth.net Sent: Saturday, December 20, 2008 7:39 PM Subject: Re: [Elecraft] k3 matching filters The main receiver offset is -.97 but the new 2.k filter is marked -.93. My question is are these a match or did I get the wrong part? I think you may have received the wrong filter. At this point, I'd install the new filter in the KRX3, but set the Main and KRX3 offsets to -0.95 (split the difference). 20 Hz is not going to make a practical difference in any operational sense that come sot mind. You can check with Aptos to see about swapping the filter. If the new filter is in the KRX3, it will be the easier one to swap out later. Sorry about the error. I hope you get a lot of enjoyment and use out of the KRX3. If you have a second antenna, or a length of wire laying around that you can pretend is a second antenna, you are likely to find Diversity reception a real eye-opener (or is that a band opener?) 73 and Happy Holidays, Lyle KK7P ___ 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 matching filters
As noted on our orde form, our matched offset filter spec is to within 40 Hz or less, since our 5 pole crystals can vary in center frequency from batch to batch. Set the offset for the two filters identically to the nearest 10 Hz value half way between the two offset values. In your case, set them both to -0.95. This results in a worse case center offset of 20 Hz, which is not detectable. :-) 73, Eric _..._ -Original Message- From: aa1o aa1o.ra...@comcast.net Date: Saturday, Dec 20, 2008 2:30 pm Subject: [Elecraft] k3 matching filters To: elecraft@mailman.qth.net I received the KRX3 and the DVR today and am about to upgrade my k3. I am using the 2.7 if roofing filter in the main unit and requested and paid for a matching filter for the sub receiver. The main receiver offset is -.97 but the new 2.k filter is marked -.93. My question is are these a match or did I get the wrong part? I would like to know before I install things because I would like not to have to redo the installation if the part is wrong. -Bill AA1O k3 287 k2 1740 ___ 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 matching filters
The main receiver offset is -.97 but the new 2.k filter is marked -.93. My question is are these a match or did I get the wrong part? I think you may have received the wrong filter. Shows what I know. The matching spec is to within 40 Hz, so you in fact received the correct filter. Which is even better! 73, Lyle KK7P (who is eating crow...) ___ 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] OT: new SS amps
Who can afford almost $3K? Ham radio getting way outta my league! 73, Sandy W5TVW - Original Message - From: DOUGLAS ZWIEBEL doug...@gmail.com To: Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, December 20, 2008 4:30 PM Subject: [Elecraft] OT: new SS amps I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? de Doug KR2Q I have no vested interest in this company. ___ 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.19/1857 - Release Date: 12/19/2008 10:09 AM ___ 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] OT: new SS amps
Ron, there are other considerations. The tubes available today are made in China. I had very bad luck with two sets of Taylor brand 572Bs that were made in China. One set never worked at all and the other set lasted about a month. I am still using the 572Bs that I bought in 1976 used. So, if you get one of the 811A or 572B amps with Chinese tubes how long will they last? Am I extremely unlucky or did I ruin them intentionally as R. F. Parts accused? I really don't know, but it certainly will weigh heavily on my decision of what amp to buy. In fact, I just bought a used ALS-600. I will see how well that works for me. Tuning is not really a factor for me. If you buy a No Tune solid state amp then need an antenna tuner you have not changed things a lot. But, will you need new tubes in a month or so? How long will you be able to buy them? Willis 'Cookie' Cooke K5EWJ --- On Sat, 12/20/08, Ron D'Eau Claire r...@cobi.biz wrote: From: Ron D'Eau Claire r...@cobi.biz Subject: RE: [Elecraft] OT: new SS amps To: 'Elecraft Reflector' elecraft@mailman.qth.net Date: Saturday, December 20, 2008, 3:44 PM What catches my eye is that comparing the amps on page 1 and page 9, you have to pay $2,000 more for an additional 1.7 dB of gain with the amp on page 9. Sure. you have to know how to adjust an amp and actually tune the one on page 1 whereas the one on page 9 is no tuning (assuming the antenna is tuned or you do the tuning with an external tuner). I guess that's significant to the hard-core contester, but for that convenience along with the 1.7 dB gain you must pay $2,000 for those who demand the ability to QSY across the band or between bands instantly, or who want to operate their station remotely through a computer. Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of DOUGLAS ZWIEBEL Sent: Saturday, December 20, 2008 2:30 PM To: Elecraft Reflector Subject: [Elecraft] OT: new SS amps I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? de Doug KR2Q ___ 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] OT: new SS amps
Sandy, did you ever take a look at what a kilowatt amp cost in 1955? It would be more than than $3,000 when $3,000 was a year's pay for most. Willis 'Cookie' Cooke K5EWJ --- On Sat, 12/20/08, Sandy ebj...@charter.net wrote: From: Sandy ebj...@charter.net Subject: Re: [Elecraft] OT: new SS amps To: DOUGLAS ZWIEBEL doug...@gmail.com, Elecraft Reflector elecraft@mailman.qth.net Date: Saturday, December 20, 2008, 5:14 PM Who can afford almost $3K? Ham radio getting way outta my league! 73, Sandy W5TVW - Original Message - From: DOUGLAS ZWIEBEL doug...@gmail.com To: Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, December 20, 2008 4:30 PM Subject: [Elecraft] OT: new SS amps I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? de Doug KR2Q I have no vested interest in this company. ___ 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.19/1857 - Release Date: 12/19/2008 10:09 AM ___ 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] OT: new SS amps
That is why many hams built their own amplifiers back then - a pair of 813s could be obtained for $25 or less back then and there were surplus transformers available at a reasonable cost. There were several pair of 813s in Grounded Grid circuits published back then, followed by the 'pair of 572Bs in GG' designs. BTW - they work just fine today if one can find one of those old homebrew amplifiers - but they are usually large and built on rack mount chassis, some used plug-in coils while others used a PI-network output circuit. Yes, they had to be tuned to resonance and loaded to the correct plate current draw, but that is not much different than adjusting a manual ATU in today's world - we just moved the tuning mechanism outside the amplifier. No Tune amplifiers are not new - Centronics had one available back in the 1960s. 73, Don W3FPR WILLIS COOKE wrote: Sandy, did you ever take a look at what a kilowatt amp cost in 1955? It would be more than than $3,000 when $3,000 was a year's pay for most. Willis 'Cookie' Cooke K5EWJ ___ 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] K2: For sale: QRP Version WITH KAF2; KSB2; K160RX; KNB2; KAT2
K2 S/N 00502. Version 2.04P/1.09; KSB2 1.08b. Options furnished: KAF2; KSB2; K160RX; KNB2; KAT2. Kenwood hand microphone. Documentation and manual included. Updated and recalibrated November 2007 by Gary Surrency AB7MY of Elecraft. Rig works very, very well. Excellent condition. $695 plus shipping + insurance. CONUS only please. ___ 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] KX1 / K1-4: Wanted to Trade for KX1 or K1
Wanted to trade for an Elecraft KX1 with all options or Elecraft K1-4 with options. An Hi-Q-Antennas NVIS dipole [or two mobile verticals]. Equipment is heavy duty, well machined, snaps apart with bayonet mounts and the tripod mounting head is for NVIS. Mobile mounting bracket(s) would need to be purchased for use on a truck or SUV – kit has two mobile verticals or one NVIS. This is high quality, extremely well made and highly specialized equipment for NVIS or two mobile verticals. Antenna is essentially a remotely tunable buddipole or buddistick with heavy duty motors inside the loading coils. Best thought of as a buddipole or buddisticks on steroids. Hi-Q-3/80 TAD Non-military version -- NVIS Hi-Q-3/80 motorized remote TAD tune-a-dipole on mounting base. 2 Giant Quick disconnects (GQD’s) 2 Whip Quick Disconnects (WQD's) 2 4-lobe CapHat's Tripod Reed Switches Cables/Connectors MFJ-1924 controller ## More information @ http://www.hiqantennas.com/ http://www.hi-q-militaryantennas.com/nvis.html [From Hi-Q Website] “Hi-Q-3/80 Tune-A-Dipole 10-80 Meter HF Portable antenna. The Tune-A-Dipole is available in both a Manually Tunable version and a Remotely Tunable (Motorized) version. The rotatable Hi-Q-Tune-A-Dipole HF antenna is very light and transportable -- just 7 pounds -- with the longest element only 34 long, when broken down for transportation. It is based on the Hi-Q-3/80 XTL (Extra Light) HF mobile antenna. A pair, back to back, assembles in minutes. The Hi-Q loading coil (Q=360) handles SSB legal limit and will tune CONTINUOSLY from 10-80 M including the NEW 60 M band.” ___ 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] OT: new SS amps
No, but a popular mobile amp that ran 600 watts were selling for considerably less. I used a Henry 2K-2 for years until it good too damned heavy for this old man to horse around! I now have an Ameritron AL-811H Much lighter and 500 watts is very adequate. Will run more, but why do it as the 811A's I have will last a long time at 500 watts CW. Solid state would be niceBUT. Hard to by on a retirement fixed income. 73, Sandy W5TVW Been listening on 3546.5 nights around 0200-0300Z on the little rig inside. - Original Message - From: WILLIS COOKE wrco...@flash.net To: Sandy ebj...@charter.net; Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, December 20, 2008 7:32 PM Subject: Re: [Elecraft] OT: new SS amps Sandy, did you ever take a look at what a kilowatt amp cost in 1955? It would be more than than $3,000 when $3,000 was a year's pay for most. Willis 'Cookie' Cooke K5EWJ --- On Sat, 12/20/08, Sandy ebj...@charter.net wrote: From: Sandy ebj...@charter.net Subject: Re: [Elecraft] OT: new SS amps To: DOUGLAS ZWIEBEL doug...@gmail.com, Elecraft Reflector elecraft@mailman.qth.net Date: Saturday, December 20, 2008, 5:14 PM Who can afford almost $3K? Ham radio getting way outta my league! 73, Sandy W5TVW - Original Message - From: DOUGLAS ZWIEBEL doug...@gmail.com To: Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, December 20, 2008 4:30 PM Subject: [Elecraft] OT: new SS amps I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? de Doug KR2Q I have no vested interest in this company. ___ 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.19/1857 - Release Date: 12/19/2008 10:09 AM ___ 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.19/1859 - Release Date: 12/20/2008 2:34 PM ___ 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] Elecraft CW Net Announcement
Good Evening, I better get this out before the power and phones go out. I am currently charging the battery to get it as charged as possible. The inevitable power outage will occur some time either today or tomorrow. Our weather is rather wintery here ;) On top of my two feet of snow I am getting another foot to foot and half in short order. The wind has gotten stronger so there is blowing and drifting snow. It is hard to tell which type of snow is flying by because the trees are shedding their loads of snow too. It is difficult to see where my trucks are parked. Luckily my woodpiles are fairly easy to locate. They are some of the larger humps in the snow. Propagation was not so bad this week but past performance does not predict the future. I did read a NASA article about the ionosphere being lower than expected. That may be why conditions have been so odd lately. The last few Fox hunts have been tough indeed. Hearing any of the hounds is difficult but to hear the fox too is almost miraculous. I will have my battery bank ready for tomorrow's nets but I may not be able to post any email report for a few days. I forgot to add in the above weather report the predicted freezing rain for tomorrow. If icing conditions occur like forecast power lines will snap into little bits of wire taking weeks to repair. But, the wood keeps me warm, the camp stove will keep me fed, and there is water in a pond nearby for little necessities :) Please join us tomorrow evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) Monday z (Sunday 4 PM PST) 14050 kHz Monday 0300z (Sunday 7 PM PST) 7045 kHz Stay warm, Kevin. KD5ONS - ___ 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] OT: new SS amps
DOUGLAS ZWIEBEL wrote: I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? Just a couple of things: 1) Unless all of your antennas are very well matched you'll need a tuner. An autotuner for 1200w is relatively expensive. So 'no tune' is not exactly true. 2) It doesn't appear to include QSK; the band decoder is also extra. 3) It says 1200 watts of clean SSB output. I suggest this means 1000w on CW and 600w RTTY. Because of 1 2 it's not so cheap. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ 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] OT: new SS amps
Well the ALS 600 I had did not put out 600 on all bands. It was especially down on 80 meters more like 425 to 450 watts although plenty of power. I understand this is typical with the 600 so it makes me wonder if this amp would truly put out 1200 on all bands or even miss 1000 on some bands. Kind of a bummer, no QSK, band decoder or as you see as that added extra in the foreign amps, 6 meters. 73 de KE4WY Jim -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Vic K2VCO Sent: Saturday, December 20, 2008 10:45 PM To: DOUGLAS ZWIEBEL Cc: Elecraft Reflector Subject: Re: [Elecraft] OT: new SS amps DOUGLAS ZWIEBEL wrote: I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? Just a couple of things: 1) Unless all of your antennas are very well matched you'll need a tuner. An autotuner for 1200w is relatively expensive. So 'no tune' is not exactly true. 2) It doesn't appear to include QSK; the band decoder is also extra. 3) It says 1200 watts of clean SSB output. I suggest this means 1000w on CW and 600w RTTY. Because of 1 2 it's not so cheap. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ 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] OT: new SS amps
I bought my 572Bs about ten years ago, 10USD for each one. After 5+ QSOs, I replaced it about 3 years ago. Not bad for 30USD investment. I was heard the new 572B is not as good as ten years ago, that is only because the dealer (in US?) need more cheaper 572Bs. All the best! David BA4RF On Sun, Dec 21, 2008 at 9:15 AM, WILLIS COOKE wrco...@flash.net wrote: Ron, there are other considerations. The tubes available today are made in China. I had very bad luck with two sets of Taylor brand 572Bs that were made in China. One set never worked at all and the other set lasted about a month. I am still using the 572Bs that I bought in 1976 used. So, if you get one of the 811A or 572B amps with Chinese tubes how long will they last? Am I extremely unlucky or did I ruin them intentionally as R. F. Parts accused? I really don't know, but it certainly will weigh heavily on my decision of what amp to buy. In fact, I just bought a used ALS-600. I will see how well that works for me. Tuning is not really a factor for me. If you buy a No Tune solid state amp then need an antenna tuner you have not changed things a lot. But, will you need new tubes in a month or so? How long will you be able to buy them? Willis 'Cookie' Cooke K5EW ___ 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] K3 Power out
Firstly Got the K3 assembled. The transverter board was back ordered and so is the subreceiver so I will be re entering the K3 and adding to it at least twice over the next few months. I'm not looking forward to the disassembly re-assembly but doing the kit sure gave me a great appreciation for the detail and function this marvelous radio has. Absolutely amazing. Kudos Wane Eric, you surely have an amazing way of looking at things. Most effective and clear. With that there are a few questions but in the spirit of one at a time; The power supply I have been using in the setup is a Heathkit Power supply which was made for one of their last Transceivers. It's a HP- 1144 and offers 20 Amps out. After calibrating the K3 I tried getting 120 watts out to the dummy load but after the 50 watt calibration, when I held tune down to see how it read. I only got 102-105W out, not 120, though I set he power out at 120W. I'm wondering if the Heath power supply is lacking and that's the reason for the lower maximum output? It seemed to work well as a backup for the Omni V corsair. Idears? Thanks Gary (One year older as of yesterday...) ___ 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] K3 Panel Screws - I'm Not Alone
Yet again, from tonight's reflector digest: So - Now after two mod processes plus installation of the KRX3, my cabinet screws are starting to show a little wear. Maybe Elecraft should offer a small kit that just includes replacement cabinet screws (top-and side-cover especially) for those of us who keep taking our K3s apart. Phil - AD5X Here, here! Those screws heads are too malleable, a few of yours are showing wear and tear. I wish I'd ordered a full set of them -- they're cheap. Maybe they'll be offered by Elecraft. They did give me better side panel heat sink screws (two) for the K2. Aptos finally realized the initial pair weren't good for repeated assembly and disassembly. ___ 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 out
Hello Gary, and congratulations! Opening up the K3 again is not nearly as traumatic as you might think. The POWER control will *ask* for more than the rig can deliver. It's spec'd at 100 watts, and that's what is guaranteed. The K3 can make a bit more than 100 watts on most bands, but that's all it's spec'd to do. When you set the POWER control for a specific output, it tries to adjust the transmitter circuits for that output, but can't do it if it's out of their range. That's what is happening to you at 120 watts. The absolute maximum power will vary by band and to some extent from rig to rig. But since 120 watts is a whole 0.8 dB more than 100 watts, it's not significant on the air. You're probably crowding that 20 amp supply at 100 watts on some bands. The efficiency (and so the current required for a given output power) varies from band to band. I'm running a K3 with a 20 amp supply, but I'm near the limit on some bands at right on 20 amps for 100 watts out, if the SWR is quite low. (Higher SWR's reduce the efficiency so the current goes up!) I don't know whether your supply has a crowbar circuit in it, but my Astron does. It lets me know if I push too hard by simply shutting down. I have to cycle the power supply mains switch to reset it, then turn the K3 on again. Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary Smith Sent: Saturday, December 20, 2008 9:04 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 Power out Firstly Got the K3 assembled. The transverter board was back ordered and so is the subreceiver so I will be re entering the K3 and adding to it at least twice over the next few months. I'm not looking forward to the disassembly re-assembly but doing the kit sure gave me a great appreciation for the detail and function this marvelous radio has. Absolutely amazing. Kudos Wane Eric, you surely have an amazing way of looking at things. Most effective and clear. With that there are a few questions but in the spirit of one at a time; The power supply I have been using in the setup is a Heathkit Power supply which was made for one of their last Transceivers. It's a HP- 1144 and offers 20 Amps out. After calibrating the K3 I tried getting 120 watts out to the dummy load but after the 50 watt calibration, when I held tune down to see how it read. I only got 102-105W out, not 120, though I set he power out at 120W. I'm wondering if the Heath power supply is lacking and that's the reason for the lower maximum output? It seemed to work well as a backup for the Omni V corsair. Idears? Thanks Gary (One year older as of yesterday...) ___ 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] OT: new SS amps
With 8 x MRF150 the ALS-1300 has the same transistor component at a Quadra ... and probably the same power output. What is lacking is six meters, the tuner and QSK. As far as the band decoder ... ALS-1300 will be +12V to select band (all on one RJ-45) vs. Yaesu format BCD for the Quadra (only works with Yaesu radios). I can't see much difference there as one could do the job with a W9XT BCD-10 for $20. QSK probably just needs faster relays ... so it really boils down to is six meters and the tuner worth the extra $1000. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Vic K2VCO Sent: Saturday, December 20, 2008 10:45 PM To: DOUGLAS ZWIEBEL Cc: Elecraft Reflector Subject: Re: [Elecraft] OT: new SS amps DOUGLAS ZWIEBEL wrote: I just ran into this by accident. http://www.ameritron.com/catalog/Ameritron_2009.pdf See page 9. No stated expected delivery Not enough specs for my liking, but still, rather interesting. Is this contest grade? Who knows? Just a couple of things: 1) Unless all of your antennas are very well matched you'll need a tuner. An autotuner for 1200w is relatively expensive. So 'no tune' is not exactly true. 2) It doesn't appear to include QSK; the band decoder is also extra. 3) It says 1200 watts of clean SSB output. I suggest this means 1000w on CW and 600w RTTY. Because of 1 2 it's not so cheap. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ 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 out
I got following data with IFR AM/FM 1600: K3 sn1302 POWER SET(W) POWER OUT（W) Difference ERR(%) 0 0.15 0.15 0.1 0.15 0.05 50.00% 0.2 0.3 0.1 50.00% 0.3 0.31 0.01 3.33% 0.4 0.4 0 0.00% 0.5 0.51 0.01 2.00% 0.6 0.63 0.03 5.00% 0.7 0.69 -0.01 -1.43% 0.8 0.76 -0.04 -5.00% 0.9 0.83 -0.07 -7.78% 1 1 0 0.00% 2 2.1 0.1 5.00% 3 3.2 0.2 6.67% 4 4.2 0.2 5.00% 5 5 0 0.00% 6 5.8 -0.2 -3.33% 7 6.6 -0.4 -5.71% 8 7.7 -0.3 -3.75% 9 8.8 -0.2 -2.22% 10 9.7 -0.3 -3.00% 12 11.4 -0.6 -5.00% 14 15.8 1.8 12.86% 16 17.5 1.5 9.38% 18 19.7 1.7 9.44% 20 21.8 1.8 9.00% 22 24 2 9.09% 24 25.5 1.5 6.25% 26 27.7 1.7 6.54% 28 29.3 1.3 4.64% 30 30.8 0.8 2.67% 32 33.3 1.3 4.06% 34 35.1 1.1 3.24% 36 37 1 2.78% 38 38.9 0.9 2.37% 40 40.5 0.5 1.25% 42 42 0 0.00% 44 44 0 0.00% 46 46 0 0.00% 48 48 0 0.00% 50 50.5 0.5 1.00% 55 54 -1 -1.82% 60 59 -1 -1.67% 65 63 -2 -3.08% sorry, no over 65w data because no bigger PS in lab. All the best! David BA4RF On Sun, Dec 21, 2008 at 1:03 PM, Gary Smith g...@doctorgary.net wrote: Firstly Got the K3 assembled. The transverter board was back ordered and so is the subreceiver so I will be re entering the K3 and adding to it at least twice over the next few months. I'm not looking forward to the disassembly re-assembly but doing the kit sure gave me a great appreciation for the detail and function this marvelous radio has. Absolutely amazing. Kudos Wane Eric, you surely have an amazing way of looking at things. Most effective and clear. With that there are a few questions but in the spirit of one at a time; The power supply I have been using in the setup is a Heathkit Power supply which was made for one of their last Transceivers. It's a HP- 1144 and offers 20 Amps out. After calibrating the K3 I tried getting 120 watts out to the dummy load but after the 50 watt calibration, when I held tune down to see how it read. I only got 102-105W out, not 120, though I set he power out at 120W. I'm wondering if the Heath power supply is lacking and that's the reason for the lower maximum output? It seemed to work well as a backup for the Omni V corsair. Idears? Thanks Gary (One year older as of yesterday...) ___ 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 out
Ron A crowbar circuit is used to disable the power supply in the event of over voltage. The current limit is what would limit the current output of a power supply. A typical crowbar circuit uses a SCR triggered by a voltage sensor. The SCR conducts and shorts the output of the supply. Which in turn puts it into current limit mode and decreases the output voltage to near zero. And yes, a 20 amp supply is marginal for a 100 watt HF rig because of the examples you have given. The 20 amp Astron can be fudged a little bit by increasing the current limit to around 22 amps. The modification involves adding a resistor to the current limit circuit of the 723 regulator. 73 and Merry Christmas to all! Jim W7RY - Original Message - From: Ron D'Eau Claire r...@cobi.biz To: g...@doctorgary.net; elecraft@mailman.qth.net Sent: Saturday, December 20, 2008 9:40 PM Subject: RE: [Elecraft] K3 Power out Hello Gary, and congratulations! Opening up the K3 again is not nearly as traumatic as you might think. The POWER control will *ask* for more than the rig can deliver. It's spec'd at 100 watts, and that's what is guaranteed. The K3 can make a bit more than 100 watts on most bands, but that's all it's spec'd to do. When you set the POWER control for a specific output, it tries to adjust the transmitter circuits for that output, but can't do it if it's out of their range. That's what is happening to you at 120 watts. The absolute maximum power will vary by band and to some extent from rig to rig. But since 120 watts is a whole 0.8 dB more than 100 watts, it's not significant on the air. You're probably crowding that 20 amp supply at 100 watts on some bands. The efficiency (and so the current required for a given output power) varies from band to band. I'm running a K3 with a 20 amp supply, but I'm near the limit on some bands at right on 20 amps for 100 watts out, if the SWR is quite low. (Higher SWR's reduce the efficiency so the current goes up!) I don't know whether your supply has a crowbar circuit in it, but my Astron does. It lets me know if I push too hard by simply shutting down. I have to cycle the power supply mains switch to reset it, then turn the K3 on again. Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary Smith Sent: Saturday, December 20, 2008 9:04 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 Power out Firstly Got the K3 assembled. The transverter board was back ordered and so is the subreceiver so I will be re entering the K3 and adding to it at least twice over the next few months. I'm not looking forward to the disassembly re-assembly but doing the kit sure gave me a great appreciation for the detail and function this marvelous radio has. Absolutely amazing. Kudos Wane Eric, you surely have an amazing way of looking at things. Most effective and clear. With that there are a few questions but in the spirit of one at a time; The power supply I have been using in the setup is a Heathkit Power supply which was made for one of their last Transceivers. It's a HP- 1144 and offers 20 Amps out. After calibrating the K3 I tried getting 120 watts out to the dummy load but after the 50 watt calibration, when I held tune down to see how it read. I only got 102-105W out, not 120, though I set he power out at 120W. I'm wondering if the Heath power supply is lacking and that's the reason for the lower maximum output? It seemed to work well as a backup for the Omni V corsair. Idears? Thanks Gary (One year older as of yesterday...) ___ 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 ___ 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 out
After measuring the TX IMD on SSB I stopped putting the radio above 100W. IMO the K3 should be limited to 100W, it is sad to see it isn´t. My advice would be, on SSB never go above 199W, on CW it doesn´t matter. Please Elecraft, make a FW change and limit the radio to 100W, thanks! / Jim SM2EKM --- Ron D'Eau Claire wrote: Hello Gary, and congratulations! Opening up the K3 again is not nearly as traumatic as you might think. The POWER control will *ask* for more than the rig can deliver. It's spec'd at 100 watts, and that's what is guaranteed. The K3 can make a bit more than 100 watts on most bands, but that's all it's spec'd to do. When you set the POWER control for a specific output, it tries to adjust the transmitter circuits for that output, but can't do it if it's out of their range. That's what is happening to you at 120 watts. The absolute maximum power will vary by band and to some extent from rig to rig. But since 120 watts is a whole 0.8 dB more than 100 watts, it's not significant on the air. You're probably crowding that 20 amp supply at 100 watts on some bands. The efficiency (and so the current required for a given output power) varies from band to band. I'm running a K3 with a 20 amp supply, but I'm near the limit on some bands at right on 20 amps for 100 watts out, if the SWR is quite low. (Higher SWR's reduce the efficiency so the current goes up!) I don't know whether your supply has a crowbar circuit in it, but my Astron does. It lets me know if I push too hard by simply shutting down. I have to cycle the power supply mains switch to reset it, then turn the K3 on again. Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary Smith Sent: Saturday, December 20, 2008 9:04 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 Power out Firstly Got the K3 assembled. The transverter board was back ordered and so is the subreceiver so I will be re entering the K3 and adding to it at least twice over the next few months. I'm not looking forward to the disassembly re-assembly but doing the kit sure gave me a great appreciation for the detail and function this marvelous radio has. Absolutely amazing. Kudos Wane Eric, you surely have an amazing way of looking at things. Most effective and clear. With that there are a few questions but in the spirit of one at a time; The power supply I have been using in the setup is a Heathkit Power supply which was made for one of their last Transceivers. It's a HP- 1144 and offers 20 Amps out. After calibrating the K3 I tried getting 120 watts out to the dummy load but after the 50 watt calibration, when I held tune down to see how it read. I only got 102-105W out, not 120, though I set he power out at 120W. I'm wondering if the Heath power supply is lacking and that's the reason for the lower maximum output? It seemed to work well as a backup for the Omni V corsair. Idears? Thanks Gary (One year older as of yesterday...) ___ 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] f/w 2.73/1.98 power calibration
After reading about the TXG VCE parameter I reloaded MCU 2.73/DSP 1.98 and attempted to adjust the gain back to a reasonable level. By setting TXG VCE to -3.0 dB I came close to my requested power output on the K3's meter, when set to 40w I get between 4-5 bars on the graph. This is with the 5th bar flickering slightly on the ALC meter. At the same time I also tried the ADC REF calibration and came up with 4.967 v on my Fluke meter, so I set the K3 to 4.97. It seems to me that having to set the TXG VCE to it's minimum setting suggests something is still not quite right with the new firmware... 73, Steve K3/100 #1544 ___ 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 out
Sorry made a typo. 199W should be 100W. Jan Erik Holm wrote: After measuring the TX IMD on SSB I stopped putting the radio above 100W. IMO the K3 should be limited to 100W, it is sad to see it isn´t. My advice would be, on SSB never go above 199W, on CW it doesn´t matter. Please Elecraft, make a FW change and limit the radio to 100W, thanks! / Jim SM2EKM ___ 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
