Re: [Elecraft] What makes K2's SSB performance less impressive than on CW ?
Peter, As you say the K2's CW performance can't be praised too highly, however in my opinion the SSB side is unfinished business. You might like to look at my web site for some idea of what is wrong, and how to improve it. http://homepages.nildram.co.uk/~baker/ 73 Stewart G3RXQ On Sun, 13 Aug 2006 21:56:29 +0200, PE1E wrote: > I bought a K2 for SSB use ( + DSP option ). > > In various reviews ( e.g. EHAM ) I noticed that K2's CW performance can't be > praised too highly, but there is a bit reserve as to the SSB performance. > > In which respects - if at all - lags the SSB performance ? > And what would cause this ? > > Thanks for any comment. > This is a great reflector. > > Peter, PE1E. > > > ___ > 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] Elecraft CW Net Report for August 13th & 14th, 2006
On Sun, 2006-08-13 at 20:30 -0700, Kevin Rock wrote: > On twenty meters there were two surprises; both during the same > contact. First we had EI6IZ check in. The second miracle was I copied > his call correctly right off. I've grown accustomed to K, A, W, N, V, and > the occasional XE call but when a totally foreign one comes along I > normally blow it. I need more DX experience obviously. Nice conditions, I have been (on a casual basis) keeping my ear out for the net for a couple of years now. Last Night was the first time I heard anything. Not an easy night either, 14.050 was a small window between two strong contest stations. I was running 400W (K2 + KPA driving an Acom 1000) to a M2 7-10-30 Log periodic at 60 feet Heard this end KD5ONS N0SS W0CZ 73's Brendan EI6IZ ___ 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] What makes K2's SSB performance less impressive than on CW ?
Having an FT857D and TS570D, when I compare the CW performance of my K2 with them, the K2 wins every time. Due in no small part to the narrow "roofing" filter inherent in a single conversion receiver, the good and quiet solid state change over and the low noise receiver. On SSB the differences are less, especially if I ignore the FT857D as it's quite "hissy" on receive. The TS570 isn't a bad performer on SSB and has nice sounding audio. My K2's SSB unit is an early one and has a nominal bandwidth of 2.2 KHz. Compared to the wider bandwidth of the Kenwood, it will sound more restricted. Add the basic K2's power limitation of 10 Watts, which has more of an impact on SSB than CW, then it's no surprise the K2 tends to get less of an enthusiastic review when compared on SSB. 73 Dave, G4AON K2 #1892 ___ 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: Elecraft Digest, Vol 28, Issue 14
I have a Sure 527C mic connected to my K2 and I get very good SSB reports. People praise it and find it hard to believe I'm not running a 1000MP or something similar. The Icom HM-36 works extremely good as a mic also. My K2 did not respond very will with a dynamic mic. Dave VK2NA On Mon, 14 Aug 2006 18:02:34 +1000, <[EMAIL PROTECTED]> wrote: In various reviews ( e.g. EHAM ) I noticed that K2's CW performance can't be praised too highly, but there is a bit reserve as to the SSB performance. In which respects - if at all - lags the SSB performance ? And what would cause this ? Thanks for any comment. This is a great reflector. -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ ___ 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] What makes K2's SSB performance less impressive than onCW ?
Hi Peter, I am wondering if these remarks about The K2 SSB are old. The following is how I remember the discussions on this subject and I think some of the text is on the K2 website. I am surprised no one has said the following before. And this is all from my memory, which is probably failing so if others can correct me, that’s OK: The K2 was originally a CW rig with capability for upgrade. When the SSB module was first introduced, I did hear comments about the K2 being better at CW than SSB. Not sure why. But I remember reading about how the K2 group was later getting feedback from some hams who were SSB connoisseurs who criticized the shape of the original filters response. As I recall it was OK but could be better. Then the K2 team researched this and, with the newer sorting tolerances in cheap filter manufacturing, realized that the SSB response could be widened and not suffer from excessive ripple. I believe another mod was made to alter the SSB response shape at another location in the K2, and also the overall shape of the filter's response was considerably modified. I have seen before and after pictures of the filter's response. The results were that the K2 SSB performance, sound wise, is now excellent. I made these mods to my K2 #402. Again I think most of this I read on the web and probably most of it on the Elecraft web site. Perhaps its time for Eric or Wayne to chime in. I know of a lady on the list that uses a K2 on SSB for nets. She is the only woman I know that does not sound whiney on SSB. I attribute this to the rig she is using. In short the K2 is now simply one of the best. Steve, W2MY -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.10.9/417 - Release Date: 8/11/2006 ___ 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] T1 ATU and Sierra
Hi Keith, Everything is working just GREAT! Just like it should. On that antenna it takes 10 seconds for the automatic tuner to do it's job and it does. I think you need another counterpoise about 33 feet to get the swr down to 1:1. Do not worry about the estimated power out. If your curious do a power out measurement after you tune up. 73 Karl K5DI [EMAIL PROTECTED] wrote: I have an Elecraft T1 ATU that I am trying to make work with a Wilderness Radio QRP rig. I am new to using ATU's and have what might be a simple question: Am I doing it right? I made an end-fed antenna that is often called the W3EDP antenna. 85 feet long with a 17ft counterpoise. I hooked it up for the first time today and tried to get it to tune on 40M. I could hear the relays clicking and clicking. Finally, it seemed to get a 2:1 or so match. I think. To do the tuning I would hit the PWR/TUN button on the T1 until it flashed green. Then I would hit both speed buttons on the Sierra to put it into Tune mode. The relays would click, click and click some more. Finally the T1 would settle down and then I would kick the Sierra out of Tune mode. Is this the correct procedure? When the Sierra is tuning it shows the estimated Watts out. As the T1 relays are clicking I can see the Watts out number changing on the Sierra. I would see it move around. Often, the final "match" would show up as a very number of watts out (< 1) but I had seen higher numbers while it was tuning. Am I doing this correct and is there a way to validate that it has tuned it OK? Thanks in advance. 73 de Keith KB3ILS p://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] Elecraft
Hi Bill, You should definitely check the "Tech Note Articles" on the Elecraft website. It will answer many of your questions (provide you with choices, as much comes down to operator preferences). I've heard a lot of good things about Heil, but have not used one with the K2 (haven't had it on SSB yet). Same for PSK, although I have a RigBlaster and MixW (both of which folks seem to like). That being said, a number of folks have built simple interfaces. You may or may not wish to go this route. As to options, if you are limited to a single antenna, both the KAT2 (QRP) and the KAT100 antenna tuners are excellent. The KIO2 is an option if you plan on controlling outboard components or using computer control for the rig. If you buy the KPA100, you won't need this as it is included. I'm guessing with your interest in PSK that either the KIO2 or KPA100 would be useful. The KNB can be handy for certain types of noise, hard to say if you would use it much or not. I do at one QTH and don't at the other. Same goes for the KAF or DSP unit, although with SSB you may be more inclined to use it than with CW. A good way to increase your code speed is to play in contests, QRP contests in particular are better places to find folks who will QRS for you. NAQCC holds a 2 hour sprint once a month around the FISTS frequencies and the folks are slow speed friendly. State QSO parties can also be QRS friendly as well. The best thing you can do is read this reflector for a while. Almost every subject under the ham sun(spots) is covered from time to time and there is a wealth of knowledge here. If you get hung up for any parts, drop me a line, I may have 'em in my junk box. Welcome aboard and good luck on your code! 73, Julius n2wn K2/100 #3311 ___ 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] Small correcton - ECN
Kevin, Actually I am in NC, not GA this week. Heard you fairly well but not many others. And of course Tom Tom, Your 20m beam has great front to back ratio (or maybe front to side, or whatever). Your sig here was well over S-9 at max and barely audible at min. So you'll be glad to know it's still functioning as a beam, and not as a top-loaded piece of coax or somthing. And I'm still wondering whether it was my sending or the propagation that morphed my NC into GA 73 de Ray K2HYD/4 ___ 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] Small correction - ECN
Ray: Tom, Your 20m beam has great front to back ratio (or maybe front to side, or whatever). Your sig here was well over S-9 at max and barely audible at min. So you'll be glad to know it's still functioning as a beam, and not as a top-loaded piece of coax or somthing. Many thanks for the report. Using a Bencher SkyHawk tribander @ 73'... works better than ANY previous tribander I've ever owned. Really sturdy, too. And I'm still wondering whether it was my sending or the propagation that morphed my NC into GA You took a really DEEP (e.g. down to pure ESP copy) when you gave your QTH, so I (wrongly) assumed you'd sent GA... my copying error, certainly NOT your fist! The QRN out here in the midwest last night was pretty horrid, and I was having problems copying just about everyone on 40M... there were a few who were decent copy, but generally, it was difficult at best. 73, Tom ___ 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] Headphones Mixer
Anyone know of an inexpensive passive headphones mixer? I want to mix the audio from my K2 with the audio from my Pegasus. A circuit with component values would also be of help. Not looking for anything fancy, just a knob to vary the balance in the headphones between the rigs. 73 de K1ESE John ___ 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] K2 Noise Blanker Slot as Additional IF Amplifier S tage
Dick, If your filters are adjusted correctly (best done using Spectrogram, as others have mentioned), it may be that you're not tuning the CW signal to the center of the filter's band pass (usually set to 600Hz). I recently added a CW tuning indicator to my K2, and now, once the indicator shows that the CW signal is centered at 600HZ, I can switch to any of the much narrower XTAL or DSP filters and the signal is always right there. To avoid the slight reduction in signal level with the narrowest XTAL filters, I have my narrowest XTAL filter set to 300Hz and when needed, then use my narrowest DSP filter, which is set to 100Hz. 73, Bob W1SRB -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Lemkes Sent: Friday, August 11, 2006 10:58 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K2 Noise Blanker Slot as Additional IF Amplifier Stage Has anyone thought of, or tried modifying the K2 Noise Blanker to be an additional K2 IF amplifier stage? My problem is that when I really, really need the crystal filter, I am trying to copy a very weak (but readable) CW signal with adjacent S-9 QRM. When I switch in tighter than about 1200 Hz of crystal filtering, I tend to lose the target signal due to filter loss. ( Losing the target signal is not because the BFOs are not properly calibrated). When I use just the DSP filter to block the adjacent S-9 QRM, then I still lose the target DX due to AGC "pumping" (without the IF "roofing" filter). I'd really like some additional IF gain to compensate for the crystal filter loss. I would try using the Noise Blanker's U1, MC1350, as the added IF stage, and use U3, the Controller's decoded program lines to adjust U1's AGC input for front panel gain control. I could use P1's pin 8, 8R, as power for the MC1350 so that it's only active on "receive". Any feedback would be appreciated. 73, Dick, AD7AF Dick and Marty Lemke PO Box 1038 Ocean Park, WA 98640 Tel. 360-665-2438 www.lemkestudios.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] Headphones Mixer
John, The ARRL Handbook has had a circuit like that - called 'An Expandable Headphone Mixer'. It is in the Station Layout and ACCessories section of the 2005 handbook and has been located in various other places in prior years. 73, Don W3FPR > -Original Message- > > Anyone know of an inexpensive passive headphones mixer? I want > to mix the audio > from my K2 with the audio from my Pegasus. > > A circuit with component values would also be of help. > > Not looking for anything fancy, just a knob to vary the balance in the > headphones between the rigs. > > 73 de K1ESE > John > ___ 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] ATU Manual
Thank you very much for the 15+ emails that I received in answering my ? on d/l the ATU manual for the K1. I discovered my problem in not finding what I wanted. I had just not arrowed down far enough on the page to find the area where i could d/l the manual. It was a stupid mistake!! Anyway thanks to everyone. Paul, KD3JF Paul, KD3JF Glen Burnie, MD FM19qd (Map Grid Square) ___ 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] What makes K2's SSB performance less impressive thanonCW ?
Two things conspired to cause trouble with early K2 SSB. Steve touched on one of them about variations in crystals. The original K2 SSB filter was purposely designed to be as narrow as possible to give the signal more "punch", especially for weak-signal/QRP operation. The narrower the bandwidth of a signal at a given power, the louder it sounds at the receiving end. So the SSB filter was designed to be just a tad over 2 kHz. That's about the minimum for good "communications quality" SSB. As Steve, W2MY observed, the variations in crystals from the manufacture meant there was a wide variation in SSB filter bandwidth. For example, mine was barely 1800 Hz wide at 6 dB down! There was no way I could get good-sounding SSB out of it. Several years ago Elecraft changed the filter design for a wider bandwidth *and* employed more consistent crystals in the kit so there was less variation from rig to rig. That seemed to put an end to all issues with the filter. When I put new crystals into the filter, I opted for the wide bandwidth mod since my use of SSB is very casual anyway. That fixed the audio quality problem. As Don pointed out, it is true that the K2 requires a fairly high output microphone. That's especially true on 10 meters where the transmitter has the least overall gain, so low audio will show up as less-than-full output if you're trying to run the full 10 watts PEP with a QRP K2 or 100 watts PEP with a K2/100. Ron AC7AC ___ 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] Headphones Mixer
The one from the ARRL HB is not passive.but it's a fair unit if you want up to 3 audio sources at the same time into the headphones. You might encounter a hiss at low audio levels though. 73, Isaac, 4Z4TL - Original Message - From: "Don Wilhelm" <[EMAIL PROTECTED]> To: "John Huffman" <[EMAIL PROTECTED]>; "Elecraft" Sent: Monday, August 14, 2006 18:00 PM Subject: RE: [Elecraft] Headphones Mixer John, The ARRL Handbook has had a circuit like that - called 'An Expandable Headphone Mixer'. It is in the Station Layout and ACCessories section of the 2005 handbook and has been located in various other places in prior years. 73, Don W3FPR -Original Message- Anyone know of an inexpensive passive headphones mixer? I want to mix the audio from my K2 with the audio from my Pegasus. A circuit with component values would also be of help. Not looking for anything fancy, just a knob to vary the balance in the headphones between the rigs. 73 de K1ESE John ___ 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] What makes K2's SSB performance less impressive thanonCW ?
Is the Kenwood MC-43S hand mic still one of the top recommendations as a hand mic that fits these requirements? --- Ron D'Eau Claire <[EMAIL PROTECTED]> wrote: > As Don pointed out, it is true that the K2 requires a fairly high output > microphone. ___ 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] What makes K2's SSB performance less impressive thanonCW ?
What would be a similarly qualified desk mic recommendation? --- David Toepfer <[EMAIL PROTECTED]> wrote: > Is the Kenwood MC-43S hand mic still one of the top recommendations as a hand > mic that fits these requirements? > > --- Ron D'Eau Claire <[EMAIL PROTECTED]> wrote: > > As Don pointed out, it is true that the K2 requires a fairly high output > > microphone. > > ___ > 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] What makes K2's SSB performance less impressive than on CW ?
Dave G4AON wrote: Having an FT857D and TS570D, when I compare the CW performance of my K2 with them, the K2 wins every time. Due in no small part to the narrow "roofing" filter inherent in a single conversion receiver, the good and quiet solid state change over and the low noise receiver. Hi Dave, if you bought the 500 Hz Collins mechanical filter for your FT-857D, then the K2 and this radio are very close in performance on both CW and SSB receiving. I am going with this from the ARRL measurements done in QST and available to members. The FT-857D is a good quiet solid state change over and a low noise receiver. On SSB the differences are less, especially if I ignore the FT857D as it's quite "hissy" on receive. The TS570 isn't a bad performer on SSB and has nice sounding audio. My FT-857D is not "hissy". I'm trying to think what you might have set wrong to cause this to occur? 73 Karl K5DI My K2's SSB unit is an early one and has a nominal bandwidth of 2.2 KHz. Compared to the wider bandwidth of the Kenwood, it will sound more restricted. Add the basic K2's power limitation of 10 Watts, which has more of an impact on SSB than CW, then it's no surprise the K2 tends to get less of an enthusiastic review when compared on SSB. 73 Dave, G4AON K2 #1892 ___ 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] What makes K2's SSB performance less impressive than onCW ?
Thanks to the many respondents to my original question. You helped me out considerably. One more ( last.. that's a promise :-) question on the SSB audio issue. Me was told that the absence of filtering between Tx mixer and Tx buffer amp could cause annoying IM products. ( The bandpass filters in the K2 are behind the Tx buffer amp., while in at least one of my other tranceivers in use here I see the bandpass filter straight behind the Tx mixer without interfacing amp. ). Could this observation contribute adversely to the SSB Tx audio quality ( in-band IM3) or do I see a ghost ? I was told this question had ever been asked before on this list ( even to Elecraft directly ) but without proper response. I searched the archive but in vain. Any comment would be appreciated highly. Thanks again. Peter, PE1E. ___ 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] What makes K2's SSB performance less impressivethanonCW ?
Hi, David: Hopefully, others who have first-hand experience with the Kenwood and other commercial and desk mics make specific recommendations. I'm using a "home brew" hand mic that has a radio shack electret element. I also changed the input resistor (R14) on the KSB2 board from 1K to 5K. That works FB for me. Thinking back about the posts on that subject over the years, it seems to me that most who have used electret mics have reported good results. Ron AC7AC -Original Message- What would be a similarly qualified desk mic recommendation? --- David Toepfer <[EMAIL PROTECTED]> wrote: > Is the Kenwood MC-43S hand mic still one of the top recommendations as > a hand mic that fits these requirements? > > --- Ron D'Eau Claire <[EMAIL PROTECTED]> wrote: > > As Don pointed out, it is true that the K2 requires a fairly high > > output microphone. ___ 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: band-passfilter location in SSB transmit chain
PE1E wrote: I was told that the absence of filtering between Tx mixer and Tx buffer amp could cause annoying IM products. ( The bandpass filters in the K2 are behind the Tx buffer amp., while in at least one of my other tranceivers in use here I see the bandpass filter straight behind the Tx mixer without interfacing amp. ). Could this observation contribute adversely to the SSB Tx audio quality ( in-band IM3) or do I see a ghost ? Peter, The TX buffer amp is operating class A, and any IMD it contributes will be completely negligible compared to the IMD contributed by the class-AB final amp. So, positioning the bandpass filters after the buffer should have no impact on observed IMD. If you see any more ghosts, let me know :) 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] KPA100 v1.10 vs v1.09
Hi there What is the difference between these 2 versions of the firmware? besides $29.00. ___ 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] k2/100 for 380 Euros on ebay?
hi guys, i believe that this offer is a fake from China. Please look for the votings before you give your offer. http://cgi.ebay.de/Elecraft-K2-Tranceiver_W0QQitemZ320017226999QQihZ011QQcategoryZ177QQssPageNameZWD2VQQrdZ1QQcmdZViewItem or item-nr. 320017226999 Michael, DC0ZO K2 #4691 ___ 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] 10 meters open -- possibly even 6 m
Hearing lots of beacons on 10 meters. This usually means an opening -- should be fun. Also hearing a few signals on 6 meters. Anyone else? 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
Re: [Elecraft] k2/100 for 380 Euros on ebay?
Michael van Hauten wrote: > i believe that this offer is a fake from China. Please look for the > votings before you give your offer. [...] > or item-nr. 320017226999 Apart from anything else, why would it be listed under "Computing > Laptops"? -- "Nosey" Nick Waterman, G7RZQ, K2 #5209. use Std::Disclaimer;[EMAIL PROTECTED] Please sponsor me! http://www.justgiving.com/noseynick "The year 2000 has come quicker than expected!" ___ 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] k2/100 for 380 Euros on ebay?
Hello Michael, You are right ! None of the comments is more than 3 days old ... It's hard to tell what has been sold so far but the counter on the bottom of the pages show it has always been bought at the first hit on the page ... Lets hope there wont be any problem ! Finaly to have some fun to that thread I invite all of you to go an read the P-P-P Powerbook story http://www.zug.com/pranks/powerbook/ ! Defintely a scam ... Martin RATH Michael van Hauten wrote: hi guys, i believe that this offer is a fake from China. Please look for the votings before you give your offer. http://cgi.ebay.de/Elecraft-K2-Tranceiver_W0QQitemZ320017226999QQihZ011QQcategoryZ177QQssPageNameZWD2VQQrdZ1QQcmdZViewItem or item-nr. 320017226999 Michael, DC0ZO K2 #4691 ___ 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] k2/100 for 380 Euros on ebay?
I sent an email asking for the serial number... Mike AI4NS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martin DD4UKP Sent: Monday, August 14, 2006 3:09 PM To: Michael van Hauten Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] k2/100 for 380 Euros on ebay? Hello Michael, You are right ! None of the comments is more than 3 days old ... It's hard to tell what has been sold so far but the counter on the bottom of the pages show it has always been bought at the first hit on the page ... Lets hope there wont be any problem ! Finaly to have some fun to that thread I invite all of you to go an read the P-P-P Powerbook story http://www.zug.com/pranks/powerbook/ ! Defintely a scam ... Martin RATH Michael van Hauten wrote: > hi guys, > i believe that this offer is a fake from China. Please look for the > votings before you give your offer. > > http://cgi.ebay.de/Elecraft-K2-Tranceiver_W0QQitemZ320017226999QQihZ011QQcat egoryZ177QQssPageNameZWD2VQQrdZ1QQcmdZViewItem > > > > or item-nr. 320017226999 > > Michael, DC0ZO > K2 #4691 > ___ > 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] What makes K2's SSB performance less impressivethanonCW ?
Hi David, Yes, it is still considered a great mic for the K2. When I sold my mint high serial number TS-850-SAT (because the K-2 filtering was so much better) I kept the MC-43S mic for the K2. Steve, W2MY -Original Message- From: On Behalf Of David Toepfer Is the Kenwood MC-43S hand mic still one of the top recommendations as a hand mic that fits these requirements? -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.10.10/418 - Release Date: 8/14/2006 ___ 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] Kenwood mic's
What is the difference between the 42s and 43s besides 1? I have a 42S that came with my 430 that I would like to use with my K2. I also have a Heil HM5, but it doesn't produce Enough audio to work. I think I need a preamp... Mike AI4NS ___ 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] k2/100 for 380 Euros on ebay?
One of you just needs to turn him in to eBay and let them shut him down. They may not be able to prove that he's not really selling a K2, but he's guilty of feedback fraud. Craig NZ0R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Short Sent: Monday, August 14, 2006 3:53 PM To: Elecraft@mailman.qth.net Subject: RE: [Elecraft] k2/100 for 380 Euros on ebay? I sent an email asking for the serial number... Mike AI4NS ___ 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] k2/100 for 380 Euros on ebay?
Hi I've reported this to eBay 30 mins ago. 73 Ben oh7ps -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Craig Rairdin Sent: 15. elokuuta 2006 0:07 To: Elecraft@mailman.qth.net Subject: RE: [Elecraft] k2/100 for 380 Euros on ebay? One of you just needs to turn him in to eBay and let them shut him down. They may not be able to prove that he's not really selling a K2, but he's guilty of feedback fraud. Craig NZ0R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Short Sent: Monday, August 14, 2006 3:53 PM To: Elecraft@mailman.qth.net Subject: RE: [Elecraft] k2/100 for 380 Euros on ebay? I sent an email asking for the serial number... Mike AI4NS ___ 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] k2/100 for 380 Euros on ebay?
Interesting how the majority of the people who provided the glowing feedback all have usernames beginning with "asd" or "qwe", and how the items they bid on were blank! 73 - Ken VE3HLS --- Michael van Hauten <[EMAIL PROTECTED]> wrote: > hi guys, > i believe that this offer is a fake from China. > Please look for the > votings before you give your offer. > > http://cgi.ebay.de/Elecraft-K2-Tranceiver_W0QQitemZ320017226999QQihZ011QQcategoryZ177QQssPageNameZWD2VQQrdZ1QQcmdZViewItem > > > or item-nr. 320017226999 > > Michael, DC0ZO > K2 #4691 > ___ > 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] 10 meters open -- possibly even 6 m
wayne burdick wrote: Hearing lots of beacons on 10 meters. This usually means an opening -- should be fun. Also hearing a few signals on 6 meters. Anyone else? As of 1504 today: SFI=86, A=0, K=2 GOES 12 X-ray flux (1.0 - 8.0A) was 7.0E-8. I'm hearing a few weak beacons on 10, nothing on 6 Fred K6DGW Auburn CA CM98lw (35 NE of Sacramento) ___ 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] 10 meters open -- possibly even 6 m
No beacons heard on 10m today at all but band is very noisy. Jerry - NR5A - South Dakota - Original Message - From: "Fred Jensen" <[EMAIL PROTECTED]> To: "Elecraft Reflector" Sent: Monday, August 14, 2006 4:10 PM Subject: Re: [Elecraft] 10 meters open -- possibly even 6 m wayne burdick wrote: Hearing lots of beacons on 10 meters. This usually means an opening -- should be fun. Also hearing a few signals on 6 meters. Anyone else? As of 1504 today: SFI=86, A=0, K=2 GOES 12 X-ray flux (1.0 - 8.0A) was 7.0E-8. I'm hearing a few weak beacons on 10, nothing on 6 Fred K6DGW Auburn CA CM98lw (35 NE of Sacramento) ___ 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] KPA100 v1.10 vs v1.09
Just an off the top of my head answer - I believe the latest KPA100 change was made to accomodate the K60XV addition of the 60 meter band (switch in the appropriate LPF and transmit level). I don't have time to look it up for verification, so you should verify it yourself - maybe look at the K60XV manual and errata for the info) 73, Don W3FPR > -Original Message- > > What is the difference between these 2 versions of the firmware? > besides $29.00. > ___ 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] 10 meters open -- possibly even 6 m
All, Because my K2 is on the bench at the moment - in pieces - I fired up the Radio Shack HTX-10 which was in the closet and went mobile with the 102" stainless steel whip this early evening. Had a near QSO with a NC station, and heard lots of 4-land beacons around 7:30 PM local. Not a wide open band, but enough to get my 10-meter juices flowing. Now I know that using a RS rig instead of a K2 is kind of like renting a Yugo when the Mercedes is in the shop but hey - one must work with what one has at any given time :) While I am writing this e-mail - does anyone have info on in-circuit testing the suspect headphone jack of my K2 with a multimeter before I go ahead and do the desoldering job? (I am getting no audio out of the internal speaker even though the speaker tests OK so I suspect the headphone jack) Joel NF9K Hartland, WI (near Milwaukee) --- wayne burdick <[EMAIL PROTECTED]> wrote: > Hearing lots of beacons on 10 meters. This usually > means an opening -- > should be fun. Also hearing a few signals on 6 > meters. Anyone else? > > 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 > __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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] kpa100 not tracking power with K2
Having problems with my kpa100 not tracking power with respect to the power knob on the K2. For example on 40m if the K2 says 40w the wattmeter shows 100 watts and the current meter on the power supply confirms the latter with ~18 amps. The leads me to suspect the power control circuit, but I'm unfamiliar with its operation. Any help would be appreciated. Pat N8vw ___ 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] Support Staff on Reflector BB?
I built K2 #5422 late spring 2006. I received excellent support from both Elecraft's staff, and from fellow builders and experienced hams on Elecraft's Reflector BB email system. I'm curious: Do any of Elecraft's support staff, routinely answer builder questions posted on reflector BB? Or is it primarily other builders and hams? Or put another way, are any of the responses on the email Reflector, from Elecraft's support technical staff? Seems like some of the more serious "problem" questions, could be answered with 100% certainty, by the Elecraft support technical staff. Example - frequent questions about LCD display part problems, etc. Questions about K2 specifications, etc. Thanks, Fred N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.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] K2 #5428 Enters Service
Hi folks, Just a short announcement to let you know that K2 #5428 goes into service tonight! I'd like to thank Don Wilhelm for doing the actual assembly of 5428 and a handful of option boards for me. I did make an attempt but my arthritic hands weren't up to the job. Anyway, it arrived today by mail. It looks beautiful, and it looks even nicer all lit up! I'll toss an antenna up in a tree tomorrow and content myself to look through the manuals and hit a few buttons tonight. Hope to find someone on 40 CW tomorrow night, though! Open Letter to Eric and Wayne at Elecraft = Guys, Thanks for producing a wonderful product. I've been reading about it for so long that I already know I'm going to love it. However, do you think you could hold off announcing any new transceivers, like the K3 for a little while? It'll drive me crazy, just getting #5428 on the air and then seeing that something newer and (undoubtedly) better is hitting the streets just a few short days or weeks later. Gimme 6 months head start, OK? Great, thanks!! 73, Ken Alexander VE3HLS ___ 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] hand mic for the K2
I am at the stage in my k2 building experience where I need to configure the mic jack in the rig. I want to keep the rig all Elecraft but unless I read the web site wrong, Elecraft no longer offer the one listed in the accessory page of the building manual. Does anyone have any suggestions or experience with the other mics they show that can be configured for use? Any input will be greatly appreciated. Dan af4lb (previously kf4pob) ___ 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: Headphone jack potential problem
Joel, Certainly you can check the headphone jack with a continuity test. You should find continuity between the 'hot' side of P5 (pin 1 - closest to the side panel) and one end of R35 and R36 (the wrong end may show you about 82 ohms). If you find no continuity, then try resoldering the pins of the headphone jack making certain you heat the pins themselves (they do not stick above the board surface) - it is possible to have a cold solder joint because only the pad was heated because the iron was not on the pins. Check the schematic for the RF Board sheet 1 in the lower left corner, the paths around the headphone jack should not be that difficult to decipher. 73, Don W3FPR > -Original Message- > > While I am writing this e-mail - does anyone have info > on in-circuit testing the suspect headphone jack of my > K2 with a multimeter before I go ahead and do the > desoldering job? (I am getting no audio out of the > internal speaker even though the speaker tests OK so I > suspect the headphone jack) > > Joel NF9K > Hartland, WI (near Milwaukee) > ___ 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] kpa100 not tracking power with K2
Pat, If this condition is confined to 40 meters, check out the KPA100 specific information regarding the position of RFC10 (the one soldered to the antenna jack) on Tom Hammond's website www.n0ss.net . If it happens on all bands, then you have another problem, so ask again and provide more information and we can lead you on a path of 'problem chasing'. First you will have to tell us whether the 'wattmeter' you refer to is an external wattmeter or the internal K2 indication. 73, Don W3FPR > -Original Message- > > Having problems with my kpa100 not tracking power with respect to > the power > knob on the K2. For example on 40m if the K2 says 40w the wattmeter shows > 100 watts and the current meter on the power supply confirms the > latter with > ~18 amps. > > The leads me to suspect the power control circuit, but I'm unfamiliar with > its operation. > > Any help would be appreciated. > > Pat N8vw > ___ 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] Proper Adjustment of K2 AGC
After reading Don's (W3FPR) AGC procedure, curiosity got the best of me. I set up my parameters as he stated and was surprised to find a considerable difference between AGC ON and AGC OFF with AGC OFF being considerably louder. I am going to remove R1 (71K) from the Control Board and substitute a pot to find the proper resistance value. I understand this pot should be adjusted to where the AGC ON and OFF should be just about the same with the RF gain set fully clockwise. If I remember correctly a 100K pot should be used to establish the value of R1. Is this the correct procedure? Roy Morris W4WFB No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.10.10/418 - Release Date: 8/14/2006 ___ 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] Proper Adjustment of K2 AGC
Roy, You must have misread something (or did a typo). The stock value for Control Board R1 on the older boards is 51k. A 50k pot will do the task for you, or a 20k pot in series with a 33k resistor. I typically find that a 39k, 36k or 33k resistor will set the proper level, but I have also found that the stock 51k value is OK in some cases. I would hesitate to go below 33k at R1 because as I have mentioned before, the S-meter settings (and readings) become 'funny' (that is tech-speak for too critical). I have not yet discovered a concise set of parameters for determining what the value should be, but I do know that the exact output from the 8 volt regulator is a large factor - if you have 8.2 volts or more from the regulator, the stock value is likely correct. I suspect (but cannot substantiate nor quantify) that there are minor dfferences in the gain vs. AGC voltage at the IF amp chip that also come into the picture. Your procedure is correct, but I would recomend the smaller value for the pot - the 100k will work, but the adjustment will be more 'touchy' compared with a smaller value. Set it to the point where the AGC ON noise is just barely discernable from the AGC OFF. 73, Don W3FPR > -Original Message- > > After reading Don's (W3FPR) AGC procedure, curiosity got the best > of me. I set up my parameters as he stated and was surprised to > find a considerable difference between AGC ON and AGC OFF with > AGC OFF being considerably louder. I am going to remove R1 (71K) > from the Control Board and substitute a pot to find the proper > resistance value. I understand this pot should be adjusted to > where the AGC ON and OFF should be just about the same with the > RF gain set fully clockwise. If I remember correctly a 100K pot > should be used to establish the value of R1. Is this the correct > procedure? Roy Morris W4WFB ___ 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] hand mic for the K2
Dan, Yes, the Elecraft MH2 and the MD2 are no longer available. There have been some comments from Eric that they were persuing replacements, but no time frame for availablity was mentioned. I will not make a specific recommendation, but I can give you some 'food for thought' One alternative is to use the Kenwood mic configuration, it is very close to the Elecraft mic configuaration (only a couple pins different and no resistor on the mic jack). Icom mics seem to be quite usable and the mic configuration info is in the KSB2 manual - most do need a resistor from the 5 volt pin to the AF pin at the mic jack (although some do not). I sent a post on mic considerations to the reflector yesterday - the subject line was 'Getting Started on K2', so you may want to review the archives for that additional info. 73, Don W3FPR > -Original Message- > > I am at the stage in my k2 building experience where I need to > configure the > mic jack in the rig. I want to keep the rig all Elecraft but > unless I read > the web site wrong, Elecraft no longer offer the one listed in > the accessory > page of the building manual. Does anyone have any suggestions or > experience with > the other mics they show that can be configured for use? > > Any input will be greatly appreciated. > > Dan af4lb (previously kf4pob) > ___ 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] Support Staff on Reflector BB?
Yes. You might also get answers from those of us on the development staff as well. On Aug 14, 2006, at 6:40 PM, Fred (FL) wrote: I'm curious: Do any of Elecraft's support staff, routinely answer builder questions posted on reflector BB? Or is it primarily other builders and hams? Or put another way, are any of the responses on the email Reflector, from Elecraft's support technical staff? - Jack Brindle, W6FB - ___ 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] k2/100 for 380 Euros on ebay? - Busted!
Hi Not very long time after I (and most propably some others too) reported eBay this "bulb head's" get-rich-fast idea is Busted. eBay works fast. 73 and let's keep being alert Ben ___ 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] Proper Adjustment of K2 AGC
A couple of people have posed a question to me off the reflector that speaks to a point I think is important: when checking to see if the volume changes when switching the AGC on and off, do it with *no antenna*! Best, a 50 ohm dummy load connected! Background QRN, even up on 10 meters, can easily trigger the AGC, especially with the preamp turned on. In that case, hearing the audio level increase when AGC is turned off is normal, indicating normal AGC operation. Ron AC7AC ___ 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
