[Elecraft] Re Dedicated HF Digital Interface Port
Hi, while I haven't tried this, why not run a plug-in cable from the rear audio jack to a DPDT switch in a small box, or even a pill bottle, or similar. Then, run a cable from one side of the switch to your soundcard interface, and the other side to a speaker or phones. You could also do this from the front audio jack, you'd just need a 3pole-double throw switch (since the front is stereo). Then simply flip the switch to whichever one you wanted audio to go to (soundcard or speaker/phones). Seems to me this should work. Not as sophisticated as a built in board, but in keeping w/the KISS Principle. 72 de N8PVZ ---bernie gaffney --- [EMAIL PROTECTED] wrote: > > After wearing out the front panel headphone > connector (twice in 2 yearsdue to > connecting/disconnecting the soundcard cable for HF > digital modes) it has become quite obvious that I > need a dedicated HF digital interface port for my > K2/100. > 73, > Tony L. (KJ5XF) > It's here! Your new message! Get new email alerts with the free Yahoo! Toolbar. http://tools.search.yahoo.com/toolbar/features/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
[Elecraft] Re: Elecraft CW Net Report for March 11th & 12th, 2007
Nice work, Kevin. This is about how many Q's I had in all of EQP this year :) 73, Wayne N6KR On Mar 11, 2007, at 9:14 PM, Kevin Rock wrote: Good Evening, Whew! Things went well even if we do have to get up extra early tomorrow!... ___ 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 Report for March 11th & 12th, 2007
Good Evening, Whew! Things went well even if we do have to get up extra early tomorrow! I think propagation was pretty good but others have different perspectives :) While W3MC was quite strong to me he could not hear either Tom or me. He got a relay from NK6A to Tom. I've mentioned one way propagation before but this time I think local noise was causing him grief. We did work into South America (I heard him <339> at least) and almost got Scotland. I got a note from GM4ESD with his signal report. If his antenna were in better shape he would have made it at least to Tom. Soon! I was on the air for quite a while yesterday and found myself getting rather stiff fingered by the end of the second net. At one point on Saturday I was in constant QSO for two hours. 80 meters was quite a bit of fun last night. I'll have to rethink my idea of gathering like minded folks on that band. I worked Nevada, California, Oregon, and Washington in quick succession. Idaho came a little later. I am sure a few more states could be added to that list to make quite a group of folks. All those who complain they cannot hear me on 20 or 40 meters should be able to work into Oregon with no problem on 80 meters. I do not think I could get too far into the Plains though. On to the lists => On 14050 kHz at 2257z: N0SS - Tom - MO - K2 - 008 KL7CW - Rick - AK - KX1 - 798 K2HYD - Ray - NC - KX1 - 608 W1TF - Ty - GA - K1 - 1423 K4JPN - Steve - GA - K2 - 1422 W3MC - Mike - MD - K2 - 5568 K1EV - Bill - CT - K2 - 2152 K6DGW - Fred - CA - K2 - 4398 QNI #50!!! NK6A - Don - CA - K2 - 1217 N3AO - Carter - PA - K2 - 678 KH6NO/W7 - Willie - NV - K2 - 1593 K6PJV - Dale - CA - K2 - 5345 QNI #20!! VE6ITA - John - AB - K2 - 5384 N0AR - Scott - MN - K2 - 4866 W6BK - Dave - CA - K2 - 4910 W0CZ - Ken - ND - K2 - 1031 N0BK - Bruce - MN - K2 - 3646 W0TBC - Joe - MN - Icom 727 NM7N - Karl - OR - K2 - 4227 On 7045 kHz at 0158z: N0SS - Tom - MO - K2 - 008 W3MC - Mike - MD - K2 - 5568 NK6A - Don - CA - K2 - 1217 VE3XL - Ric - ON - K1 - 968 NM7N - Karl - OR - K2 - 4227 AK2B - Tom - NY - K2 - 4482 W0NTA - Dick - CO - K2 - 3900 PT9FH - Tony - Brazil K6PJV - Dale - CA - K2 - 5345 W0CZ - Ken - ND - K2 - 1031 KL7CW - Rick - AK - KX1 - 798 N0AR - Scott - MN - K2 - 4866 WI6O - John - CA - K1 - 922 W6BK - Dave - CA - K2 - 4910 K4GT - Jim - GA - K2 - 2015 ND0V - Greg - CO - K2 - 4411QNI #20!! Now, before my arm falls off, please send me any corrections or additions to the above information. I made a resolution to myself to get all of my projects at least on the bench and off the computer before the weather turns nice enough to rip off my roof. When that happens I'll have to move all of my gear back here to the small room again. I hope I can get the roof and drywall work done quickly but I plan on renovating another section of the house once I get going. If my nephew is willing I can keep him busy for a few months. It will keep me warm and dry next winter and I'll gain a few hundred square feet. Until next week. Stay well, 73, Kevin. KD5ONS (Net Control Operator 5th Class) ___ 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] AGC Independent S-Meter?
Sandy, As far as I know, there is no direct relationship between the strength of a signal and receiver AGC. My AD8307 power meter can measure signal strengths directly off an antenna if called upon to do that, it goes down to -80 dBm (about S-8) with no other amplification. This is strictly a power meter, no AGC implied or implemented - the output is the base 10 logarithm of the input signal. All one must do is measure the strength of the received signal to drive an S-meter - but it must be calibrated if it is used as an absolute measurement device. Yes, the implementation in most receivers derive the AGC voltage from the same signal strength measurement circuits, so things get a bit mixed up, and often appear as a 'chicken and egg' situation. 73, Don W3FPR > -Original Message- > > Circuitrywise, an "AGC/AVC free" S-meter is an oxymoron! Can't have one > without the other. > (snip) > 73, > Sandy W5TVW > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/718 - Release Date: 3/11/2007 9:27 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] W1HUE Mod Articles back on the Web
Well, its been quite some time since I have posted to this list! I just wanted to pass this along: My equipment mod articles that were on the old ARCI web site are now on my personal site: www.w1hue.us . One article might be of particular interest to K2 owners: it describs a Peak Power Reading mod for the OHR WM-1 and WM-2 Watt Meters. It can be accessed directly at www.w1hue.us/Articles/MODS_WM1.html . (There is an "underscore" in there: "MODS_WM1") 72, Larry, W1HUE Sunny Tucson, AZ ___ 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] AGC Independent S-Meter?
On March 11, 2007 04:16 pm, Sandy W5TVW wrote: > Circuitrywise, an "AGC/AVC free" S-meter is an oxymoron! Can't have one > without the other. Why not? -- Darrell Bellerive Amateur Radio Stations VA7TO and VE7CLA Grand Forks, British Columbia, Canada ___ 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] K1 Bandwidth Question
> It wouldn't seem to provide much advantage. The bandwidth of the four-pole crystal IF filter may be adjusted in three steps from about 200 to 850 kHz. The selectivity as designed is outstanding. > > Mike / KK5F > K1 #175 since 11/2000 I usually use an outboard audio filter when operating at home. I agree that it is not needed for selectivity but it makes the sidetone sound like my K2 and I enjoy a clean CW note. I think one problem with a simple low pass filter is that the K1 has a wide range of possible sidetone pitch and a cutoff frequency that would help someone who uses a low pitch as I do would not pass a high one. Thus, filters would need to be adjustable or custom designed for the desired pitch. Rick Dettinger K7MW ___ 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] #6014 air borne
Sorry I havent been on this forum but I finished the K2[SSB/DSP/NB]a couple weeks ago and have been on the air. Fun Fun.. I'm finding it takes about 8 watts to bust thru the pile ups and get heard LOL.. But this is the sweetist rig I've had the most fun putting together and working..Elecraft sure did a fine job on this kit. I am using a 80 meter dipole, about 130 feet with 450 ladder line matched to a 4:1 balun and ant tunner..tunes 80,40,20, and 10 no problem... Great fun.. well gotta get back on the air...later all WB0OMR 73s ___ 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: BFO oscillator level
Matti, I do not believe there is any indication of a bad IC. The display is digital, and if the level is somewhere above one bar, but not quite 2 bars, there is an indecision point. I would expect all the indications point to BFO leakage. As Jack pointed out, all K2s have it, and some at a higher level than others. Evidently your leakage is greatest into your KSB2 board, and on USB, there may be a little bit more BFO voltage, hence more leakage. While you could take steps to equalize the USB and LSB BFO levels, is there really any need to do that? Since normal band noise is normally greater than the leakage signal, your best solution may be to ignore it and set the S-LO menu parameter so no bars occur in USB, then set S-HI to illuminate the last bar. If you have an XG1 or XG2 (or other source of a 50 uV signal), you can check the S-9 level and refine the S HI parameter if required. The BFO implementation in the K2 is a VXO, and the operating levels can change as the frequency of the crystals is pulled. If you want to experiment, I would suggest you obtain several sets of BFO crystals and check the operation of each set to see if the levels can be equalized. The other factor is the BFO alignment for the filter that you are using. If he USB filter is aligned so there is greater low frequency audio content than the LSB filter, you would expect more BO feedthrough because the BFO is aligned closer to the IF filter center frequency. Set the filters/BFOs for an equal response on LSB and USB before attempting to adjust the S-meter parameters. 73, Don W3FPR > -Original Message- > > Thanks Don and Jack for the info, > > Don, > I did ground Xtals X3 and X4 at the base (they where grounded on the top), > flush cut all leads on the mixer and if amp circuits. No change. > > Both LSB and USB lit 1 led when I turn the K2 on, and then after abt 5 > min, then on USB the second led will turn on, but on LSB no change. > Maybe this indicates a bad IC, either the mixer or if amp? > > Jack, > I guess that not all K2 are born equal, as you mention the BFO > leakage varying up to 10dB, between rigs. Probably some 602 and 1350 have > better (higher) revese isolation than others. > > This BFO leakage is not a big issue for me, just a little annoying. > > thanks and 73, Matti > -- >Marteinn SverrissonTF3MA > Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is > 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma >Iceland > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/718 - Release Date: 3/11/2007 9:27 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] AGC Independent S-Meter?
Circuitrywise, an "AGC/AVC free" S-meter is an oxymoron! Can't have one without the other. I pay little attention to the "S" meter on my K1. The old "ear" still one of the best indicators anyway. Such things as a 199 signal is as possible as having a 519 signal! I guess it strokes the ego of a 'phone operator to to get a 40 over 9 report. What difference does it make if the signal report is 5 by 9 + 40 db or 5 by 2? Most CW ops I know don't depend or rely much on "S" meters anyway. (Back to "ears" again!) 73, Sandy W5TVW - Original Message - From: <[EMAIL PROTECTED]> To: Sent: Sunday, March 11, 2007 4:37 PM Subject: Re: [Elecraft] AGC Independent S-Meter? In a message dated 3/11/07 12:24:04 PM Eastern Standard Time, [EMAIL PROTECTED] writes: Anyone have any ideas for an AGC independent S-meter? Here's what I've used for 40+ years: Ears -- I have never really understood the fascination with AGC and S-meters in ham radio for CW. For AM voice, sure, and maybe SSB when the frequency is clear, but when it comes to typical CW operation I don't use either. I could see where a certain amount of delayed AGC would be useful as an eardrum-saver, but the same effect can be had by a simple limiter. IMHO, anyway. 73 de Jim, N2EY ** AOL now offers free email to everyone. Find out more about what's free from AOL at http://www.aol.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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/718 - Release Date: 3/11/2007 9:27 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] re K1 bandwidth
Even though the K1 cames with two different capacitors to allow 70khz or 150khz. You can always select a capacitor from your junque box to give you ANY bandwidth that you desire. That is the beauty of the K1 ___ 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] K1 Bandwidth Question
Jeff wrote: >I built a K1 in 2004 and sold it. I'm thinking about building another >one, but the K1 I had did not go above about 7075 kHz on 40 meters. >I'd like the band coverage to be up to about 7120 kHz. As I recall, >the only way to do that is to replace a capacitor, I think it was, but >at considerable compromise to selectivity. The K1 kit comes with two capacitors that may be installed at RF-C120 to give either about a 80 kHz or a 170 kHz VFO span. The choice has absolutely *NO* effect on the selectivity of the K1, which is unchanged and excellent regardless of VFO span. Due to the extreme lack of resistance to motion of the VFO pot shaft, some find that the 170 kHz span makes it difficult to remove their fingers from the VFO knob without disturbing the setting (which they would also do with the 80 kHz span option, only the effect wouldn't be as noticable). This very trivial problem is easily solved by putting some thin felt material between the panel and the back of the VFO knob. With respect to K1 spurious signal rejection at the receiver front-end, the four-band filter board is better than the two-band filter board. The elliptical low-pass filters of the four-band board are far sharper and deeper than the simple filters on the two-band board. >...has a KAF2 audio filter mod or something like it ever been >considered for the K1? It wouldn't seem to provide much advantage. The bandwidth of the four-pole crystal IF filter may be adjusted in three steps from about 200 to 850 kHz. The selectivity as designed is outstanding. Mike / KK5F K1 #175 since 11/2000 ___ 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] AGC Independent S-Meter?
In a message dated 3/11/07 12:24:04 PM Eastern Standard Time, [EMAIL PROTECTED] writes: > Anyone have any ideas for an AGC independent S-meter? Here's what I've used for 40+ years: Ears -- I have never really understood the fascination with AGC and S-meters in ham radio for CW. For AM voice, sure, and maybe SSB when the frequency is clear, but when it comes to typical CW operation I don't use either. I could see where a certain amount of delayed AGC would be useful as an eardrum-saver, but the same effect can be had by a simple limiter. IMHO, anyway. 73 de Jim, N2EY ** AOL now offers free email to everyone. Find out more about what's free from AOL at http://www.aol.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] K1 Bandwidth Question
I built a K1 in 2004 and sold it. I'm thinking about building another one, but the K1 I had did not go above about 7075 kHz on 40 meters. I'd like the band coverage to be up to about 7120 kHz. As I recall, the only way to do that is to replace a capacitor, I think it was, but at considerable compromise to selectivity. The other question: has a KAF2 audio filter mod or something like it ever been considered for the K1? Jeff K6ATT ___ 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: BFO oscillator level
Thanks Don and Jack for the info, Don, I did ground Xtals X3 and X4 at the base (they where grounded on the top), flush cut all leads on the mixer and if amp circuits. No change. Both LSB and USB lit 1 led when I turn the K2 on, and then after abt 5 min, then on USB the second led will turn on, but on LSB no change. Maybe this indicates a bad IC, either the mixer or if amp? Jack, I guess that not all K2 are born equal, as you mention the BFO leakage varying up to 10dB, between rigs. Probably some 602 and 1350 have better (higher) revese isolation than others. This BFO leakage is not a big issue for me, just a little annoying. thanks and 73, Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ 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] AGC Independent S-Meter?
Darrell, Certainly a meter could be devised to indicate the strength of the signals making it through the IF filter - you have the correct points in mind - all you have to do is tap in at the input of the IF amplifier and then amplify the signal(s) and drive whatever circuits you want (even a duplicate of the stock IF amp and AGC/S-meter circuit). The biggest problem to solve is how to tap into that signal path without degrading the signal present in the receiver - that can be accomplished as long as you pay attention to the impedances. You may want to look into the Analog Devices AD8307 log amplifier rather than duplicating the IF amp, especially if you want to drive an external meter - the '8307 has a log function built in so you can have an S-meter log response with a linear meter. 73, Don W3FPR > -Original Message- > > As I typically leave the AF gain at maximum and use the RF gain > control to set > the listening level (Better signal to noise ratio.) the S-meter > is not too > useful. Also with the AGC turned off the S-meter is not operational. > > Anyone have any ideas for an AGC independent S-meter? > > I was thinking perhaps use some sort of high impedance RF voltage > detector > between D34 and T7 on the RF board. Then amplify the voltage to > the level and > range required at the S-meter voltage connection (pin RA1 of the > MCU), so the > existing meter could still be used. Of course the connection from > the MCU to > the AGC line would have to be disconnected. > > -- > Darrell Bellerive > Amateur Radio Stations VA7TO and VE7CLA > Grand Forks, British Columbia, Canada > ___ > 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 Free Edition. > Version: 7.5.446 / Virus Database: 268.18.8/718 - Release Date: > 3/11/2007 9:27 AM > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/718 - Release Date: 3/11/2007 9:27 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] Question from a newbie
True. And in modern equipment, high-current electrical motors are starting to appear more often as alternator/battery technology improves. In general, the number of electrically-powered equipment is on the rise. One thing the KNB2 can handle nicely from a diesel engine is the rare-but-troublesome-when-present staccato noise from some electric fuel injectors. They can be every bit as bad as noisy spark plugs. As Bob observed, *some* power line noise can be removed as well. If something is arcing over cleanly and regularly the KNB2 will kill it. It's the "frying egg" types of noise consisting of a mass of overlapping pulses of varying rates and durations that the KNB2 can't handle. Ron AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John R. Lonigro Sent: Sunday, March 11, 2007 10:40 AM To: Ken Kopp Cc: elecraft@mailman.qth.net; Fred (FL) Subject: Re: [Elecraft] Question from a newbie While it is true these trucks were probably diesels and therefore there was no IGNITION noise, it is certainly still possible for them to have produced electrical noise. If nothing else, they have alternators. I'm sure we've all heard alternator noise and I suspect the alternators on these trucks are heavy duty, capable of producing heavy duty noise. I'm not up to speed on modern diesel engine technologies, but the fuel pump and fuel injectors might also be electrical these days, not mechanical, as in days of yore (35 years ago when I was a diesel mechanic in the army). 73's, John AA0VE Ken Kopp wrote: > The "4 concrete trucks" and "two large pickups" were almost certain to > have had diesel engines and therefore would have had minimal ... if > any ... electrical noise to be heard. Even the motors operating the > concrete-handling mechanisms would have been hudraulic. Not a good > "test" for a noise blanker/eleminator. (;-) > > 73! Ken Kopp - K0PP > [EMAIL PROTECTED] > ___ 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] Question from a newbie
While it is true these trucks were probably diesels and therefore there was no IGNITION noise, it is certainly still possible for them to have produced electrical noise. If nothing else, they have alternators. I'm sure we've all heard alternator noise and I suspect the alternators on these trucks are heavy duty, capable of producing heavy duty noise. I'm not up to speed on modern diesel engine technologies, but the fuel pump and fuel injectors might also be electrical these days, not mechanical, as in days of yore (35 years ago when I was a diesel mechanic in the army). 73's, John AA0VE Ken Kopp wrote: The "4 concrete trucks" and "two large pickups" were almost certain to have had diesel engines and therefore would have had minimal ... if any ... electrical noise to be heard. Even the motors operating the concrete-handling mechanisms would have been hudraulic. Not a good "test" for a noise blanker/eleminator. (;-) 73! Ken Kopp - K0PP [EMAIL PROTECTED] ___ 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] AGC Independent S-Meter?
If you actually duplicate the AGC circuitry in the K2 for the S-meter would probably be a simple move. S-meter readings are okay but I don't trust reports from others because very few people have calibrated S-meters and even if they are they become dependant on RF Gain Settings, Preamps and attenuators. They are what they are a Relative Indicator and nothing more when it comes to most Amateur Radio operation. I usually leave the RF gain at full unless I'm on the TopBand and just use Xtal filters and the DSP module to give me a clean received signal. Anyhow on most Contests and other things you always get a 599 as everyone is too intent on making contacts to actually give you a real report. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Darrell Bellerive Sent: Sunday, March 11, 2007 12:23 PM To: elecraft@mailman.qth.net Subject: [Elecraft] AGC Independent S-Meter? As I typically leave the AF gain at maximum and use the RF gain control to set the listening level (Better signal to noise ratio.) the S-meter is not too useful. Also with the AGC turned off the S-meter is not operational. Anyone have any ideas for an AGC independent S-meter? I was thinking perhaps use some sort of high impedance RF voltage detector between D34 and T7 on the RF board. Then amplify the voltage to the level and range required at the S-meter voltage connection (pin RA1 of the MCU), so the existing meter could still be used. Of course the connection from the MCU to the AGC line would have to be disconnected. -- Darrell Bellerive Amateur Radio Stations VA7TO and VE7CLA Grand Forks, British Columbia, Canada ___ 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] Question from a newbie
Then you are fortunate enough not to be subject to power line noise at your QTH. Here I've had continuing problems with power line noise (a raspy buzz) and the K2 noise blanker is very effective indeed. Bob NW8L On 3/10/07, Rich McCabe (IWH) <[EMAIL PROTECTED]> wrote: I have had two K2's fully loaded. One with a 38xx serial and the other with a 44xx serial. Mine have never left the desk and I have yet to find any type of noise artificial or other that the NB works on. It's fun to build but in my opinion if you are looking for bang for the buck, that's not it. 73, Rich Kd0zv -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeff Kinzli N6GQ Sent: Saturday, March 10, 2007 7:22 PM To: Elecraft Mail Posting Subject: Re: [Elecraft] Question from a newbie I have a K2 with DSP, and just last weekend added the KNB2 to the mix. So far, for the noise I have here, the DSP denoiser works much better than the KNB2. I've just been switching it in and out to see what affect it has, and so far haven't found much noise that it removes. I'm in a relatively quiet place though, so that might be it. As Bob said, it's cheap, and it's a kit you can build and install in about an hour or two, so why not!? :) 73, Jeff N6GQ On 3/10/07, Bob Tellefsen <[EMAIL PROTECTED]> wrote: > Pete > It all depends on the type of noise you experience. > For some kinds of noise, the KNB2 works like magic. > For other kinds, it has no effect at all. For some odd > noises, it sort of works. > Ultimately, it's a crap shoot. It is an inexpensive option, > and I would add it as insurance for those times when > it does work. I have it in both my K2s. > 73, Bob N6WG > > - Original Message - > From: "B Peter Treml" <[EMAIL PROTECTED]> > To: > Sent: Saturday, March 10, 2007 4:44 PM > Subject: [Elecraft] Question from a newbie > > > > I have come into possession of a K2/100 with the DSP filter (KDSP2) but > does > > not have the noise blanker (KNB2). > > Question: (1) Is the noise blanker a worthwhile purchase? > > Any thoughts would be appreciated. > > 73, Pete-K8PT > > > > > > > B. Peter Treml [EMAIL PROTECTED] > > 725 W. Magnetic St. www.qrz.com/k8pt > > Marquette, Mi. 49855 > > USA > > > > ___ > > 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 ___ 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] AGC Independent S-Meter?
As I typically leave the AF gain at maximum and use the RF gain control to set the listening level (Better signal to noise ratio.) the S-meter is not too useful. Also with the AGC turned off the S-meter is not operational. Anyone have any ideas for an AGC independent S-meter? I was thinking perhaps use some sort of high impedance RF voltage detector between D34 and T7 on the RF board. Then amplify the voltage to the level and range required at the S-meter voltage connection (pin RA1 of the MCU), so the existing meter could still be used. Of course the connection from the MCU to the AGC line would have to be disconnected. -- Darrell Bellerive Amateur Radio Stations VA7TO and VE7CLA Grand Forks, British Columbia, Canada ___ 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] Question from a newbie
I made (essentially) the same reply to this identical question when it was posed awhile back. The "4 concrete trucks" and "two large pickups" were almost certain to have had diesel engines and therefore would have had minimal ... if any ... electrical noise to be heard. Even the motors operating the concrete-handling mechanisms would have been hudraulic. Not a good "test" for a noise blanker/eleminator. (;-) 73! Ken Kopp - K0PP [EMAIL PROTECTED] ___ 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] Question from a newbie
It's all about the source of the noise. My KNB2 has made it possible for me to operate where I'd otherwise have noise pegging the "S-Meter". The KNB2 removes repetitive high-amplitude pulse noise such as that produced by automobile ignition systems, cheap lamp dimmers, etc., that cause a loud "buz" in the audio. It senses the noise pulses and literally turns the signal path off for a very brief period when the next pulse arrives. Other kinds of noise, such as hash from d-c motor commutators or band noise aren't affected by the KNB2. Since large trucks such as you described are invariably diesel powered and so have no ignition system, the most likely source of that noise were the commutators in the d-c motors they use. That produces a hash much like heavy band QRN. The only way to reduce that noise that I've seen yet is a system to digitally process the signal, picking out the noise elements with a sophisticate algorithm. The Elecraft KDSP2 offers that ability. I don't have the KDSP2 in my K2 but the comments from users posted here no the reflector suggest that it's "denoiser" function works quite well. Ron AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fred (FL) Sent: Sunday, March 11, 2007 6:43 AM To: elecraft@mailman.qth.net Subject: RE: [Elecraft] Question from a newbie I built my K2 #54xx in May 06. Built the KNB2 Noise Blanker. Then found it never really seemed to work on any noise! One day, 4 cement trucks & 2 large pickups sat like 30 feet from my shack - all running, all working. The KNB2 did nothing to remove any of that man-made noise. Also it doesn't work on any band noise - that I ever found. I even got a 2nd KNB2, from Elecraft - and it didn't work either? The K2 itself - after build - operated true to all specs, calibrations, & alignments beautifully. I've since felt, the KNB2 is a design job left to be re-done, by some Elecraft designer, when they get around to it. The IC-7000's Noise Reduction and Noise Blanker circuitry - amazingly almost always reduces most band noises, real or imaginary, dramatically. Maybe in the K3? Fred N3CSY 8:00? 8:25? 8:40? Find a flick in no time with the Yahoo! Search movie showtime shortcut. http://tools.search.yahoo.com/shortcuts/#news ___ 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] K2 Sidetone
Hello Chris and Stewart - I carried out the mod to my K2 Revision A board way back in October 2000, following the instructions by WJ4P and still on the Elecraft web site. I have to say that following these instructions I changed the very raspy sidetone to a near sinewave matching my preferred sidetone frequency of 550 Hz. I believe that Elecraft incorporated a similar mod when they brought out the Revision B board. http://www.elecraft.com/Apps/sinewave_sidetone_mod.htm 73 David G4DMP/G3KEP In a recent message, G3SJJ <[EMAIL PROTECTED]> wrote ... Yes, I did wonder about the K2DSP. Haven't got one here, yet! The mod certainly makes a difference though. Keep up the CW, Stewart! 73 Chris G3SJJ Stewart Baker wrote: Although I am not really a CW man I spent a few hours in the recent BERU contest. After a while I began to get a bit 'fed up' with the raspy sidetone, and looked at the reflector achieve for a solution. I saw that G3SJJ had recently done a mod that involved adding a small board to hold the components. I was almost about to go this route but found that this method of modification would likely get in the way of the K2DSP board that sits above it. So here is what I did. a) I removed C33 and L1. b) I soldered C33 (2.2uF) in the L1 position c) I stuck L1 to the BACK of the PCB close to C33 pads with double sided tape d) I soldered the (+) terminal of a 1uF capacitor to C33 (+) pad e) The other leg of the 1uF is soldered to L1 f) The circuit is completed by soldering a 100 ohm from L1 to C33 ( -) pad This way all components except the 2.2uF capacitor are now out of the way on the back of the control PCB. The improvement in sidetone quality achieved has been very noticeable. 73 Stewart G3RXQ ___ 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] Question from a newbie
Hi Pete: I'm always the 'late' one to reply it seems... The KNB2 is a very good blanker... on CERTAIN noise types... but, as with virtually blankers, you DO have to have the right type of noise. It's generally very good no line noise, sparkplug/elec. mixer/elec. fencer noises as well. If you're interested, download http://www.n0ss.net/knb2_demo.zip from my web site and take a listen to my KNB2 in action. This was NOT a 'set-up' demonstration, I just happened to tune across a 20M signal one day when my line noise was pretty much out of sight, turned the KNB2 on, and the noise disappeared... figgered it was a good demo, so I recorded a bit of it. I have to say as well that there WILL be times when the KNB2 will appear to do NOTHING, even though I feel it should be doing its job on some noise I'm hearing. Though I've not 'scoped out' the noise, it's apparent that it must have some characteristic that the KNB2 doesn't like, or can't cope with, so the noise remains... but in general, the KNB2 works very well... FOR ME anyway! 73, Tom HammondN0SS At 07:44 PM 3/10/2007, you wrote: I have come into possession of a K2/100 with the DSP filter (KDSP2) but does not have the noise blanker (KNB2). Question: (1) Is the noise blanker a worthwhile purchase? Any thoughts would be appreciated. 73, Pete-K8PT > B. Peter Treml [EMAIL PROTECTED] 725 W. Magnetic St. www.qrz.com/k8pt Marquette, Mi. 49855 USA ___ 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 low output
Don, This is hilarious. When I use the proper TUNE sequence, it seems to work fine. I guess if things don't look right, you should really re-read the instructions (or don't work on your rig in the morning). Guess I may be ready to go for the VA QSO party next week after all. Back to final assembly and testing. Thanks, Tom KG3V Quoting Don Wilhelm <[EMAIL PROTECTED]>: > Tom, > > How are you initiating transmit? If you are pressing the TUNE button, the > power level will be about 20 watts, you must press TUNE and DISPLAY to > transmit at the full requested output. > > 73, > Don W3FPR > > > -Original Message- > > > Just finishing KPA100 assembly. All looks good up to the high > > power transmit > > tests. I am setting the power control to 100 watts. Power indicator when I > > transmit says I only have 21-25 watts out on all bands. > > > > I am looking over the workmanship, guessing that maybe the final > > stage is not > > working at all. Any help greatly appreciated. > > > > 73, > > > > Tom KG3V > > > > > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.446 / Virus Database: 268.18.8/717 - Release Date: 3/10/2007 > 2:25 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
Re: [Elecraft] K2 Sidetone
Yes, I did wonder about the K2DSP. Haven't got one here, yet! The mod certainly makes a difference though. Keep up the CW, Stewart! 73 Chris G3SJJ Stewart Baker wrote: Although I am not really a CW man I spent a few hours in the recent BERU contest. After a while I began to get a bit 'fed up' with the raspy sidetone, and looked at the reflector achieve for a solution. I saw that G3SJJ had recently done a mod that involved adding a small board to hold the components. I was almost about to go this route but found that this method of modification would likely get in the way of the K2DSP board that sits above it. So here is what I did. a) I removed C33 and L1. b) I soldered C33 (2.2uF) in the L1 position c) I stuck L1 to the BACK of the PCB close to C33 pads with double sided tape d) I soldered the (+) terminal of a 1uF capacitor to C33 (+) pad e) The other leg of the 1uF is soldered to L1 f) The circuit is completed by soldering a 100 ohm from L1 to C33 ( -) pad This way all components except the 2.2uF capacitor are now out of the way on the back of the control PCB. The improvement in sidetone quality achieved has been very noticeable. 73 Stewart G3RXQ ___ 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 low output
Don, Thanks for the quick response. I hope it is something this simple (stupid)! I will go back and try again. I was reading the power and the SWR, so I thought that should have been transmitting full power. I did take the KPA100 apart and checked soldering, checked for possible shorts, etc. and found nothing but RFC1 soldering not looking great - will check that connection before I reassemble the unit. 73, Tom KG3V Quoting Don Wilhelm <[EMAIL PROTECTED]>: > Tom, > > How are you initiating transmit? If you are pressing the TUNE button, the > power level will be about 20 watts, you must press TUNE and DISPLAY to > transmit at the full requested output. > > 73, > Don W3FPR > > > -Original Message- > > > Just finishing KPA100 assembly. All looks good up to the high > > power transmit > > tests. I am setting the power control to 100 watts. Power indicator when I > > transmit says I only have 21-25 watts out on all bands. > > > > I am looking over the workmanship, guessing that maybe the final > > stage is not > > working at all. Any help greatly appreciated. > > > > 73, > > > > Tom KG3V > > > > > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.446 / Virus Database: 268.18.8/717 - Release Date: 3/10/2007 > 2:25 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
RE: [Elecraft] KPA100 low output
Tom, How are you initiating transmit? If you are pressing the TUNE button, the power level will be about 20 watts, you must press TUNE and DISPLAY to transmit at the full requested output. 73, Don W3FPR > -Original Message- > Just finishing KPA100 assembly. All looks good up to the high > power transmit > tests. I am setting the power control to 100 watts. Power indicator when I > transmit says I only have 21-25 watts out on all bands. > > I am looking over the workmanship, guessing that maybe the final > stage is not > working at all. Any help greatly appreciated. > > 73, > > Tom KG3V > > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/717 - Release Date: 3/10/2007 2:25 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
RE: [Elecraft] K1 Question
Certainly, a zero ohm reading is an indication that pin 4 or the circuit trace or relay K1 pins 3 or 6 are shorted to ground somewhere. It could also be on relay K2 depending on the state of the relays or could be caused by a shorted crystal, or excess solder that wiched up onto the crystal lead and shorted it to the case. Check the soldering, especially for excess solder. Just enough to fill the plated thru hole is sufficient, and if there is much more than that, it can create solder bridges and short one circuit to another. Name and call please? 73, Don W3FPR > -Original Message- > > I have just finished building the 4 band filter board ( KFL1-4) > for the K1. I have 3 incorrect resistance checks that I cannot > resolve. I'll do these one at a time for clarity's sake. > The first is P1, pin 3 to pin 4. Desired reading is greater > than 100k. I'm getting zero. Any suggestions ? > Al > ___ > 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 Free Edition. > Version: 7.5.446 / Virus Database: 268.18.8/717 - Release Date: > 3/10/2007 2:25 PM > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/717 - Release Date: 3/10/2007 2:25 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
Re: [Elecraft] BFO oscillator level
One of questions frequently asked by those who have built my Z90 panadapter kit and use it with a K2 is "what is that blip that I see even with the antenna disconnected?" It is the BFO leaking backwards through the IF chain back to the post-mixer amplifier output. From what I've learned from my customers, it's present in all K2s, and seems to vary from K2 to K2 about 10 dB or so in level. With the receiver input connected to a dummy load or the antenna disconnected, it's visible with a Z90 connected to my K2 at about 25 dB above the noise level, and this level seems to be typical of my customers observations. With an antenna connected, particularly on the lower bands, enough noise is received to mostly hide the BFO leakage signal on the Z90 panadapter. You can see my measured BFO leakage data at http://www.cliftonlaboratories.com/k2_interface.htm. This page also discusses the probably leakage path and estimates the expected leakage level, based on the reverse isolation of the amplifiers in question. Jack K8ZOA www.cliftonlaboratories.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] HF Digital interface for the K2...
I am using a RigExpert SD and it works great. You will also have to use W3FPR's fixed audio board for the audio out. The SD works very well with MixW and many other programs, you will also have to have an 8 pin connector for your mic and use the patch cable out of the SD into mic plug. 73's Craig Turner KAØCT PO Box 5766 Woodland Park, CO 80866 719-661-5695 ___ 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 low output
Just finishing KPA100 assembly. All looks good up to the high power transmit tests. I am setting the power control to 100 watts. Power indicator when I transmit says I only have 21-25 watts out on all bands. I am looking over the workmanship, guessing that maybe the final stage is not working at all. Any help greatly appreciated. 73, Tom KG3V ___ 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] Question from a newbie
I built my K2 #54xx in May 06. Built the KNB2 Noise Blanker. Then found it never really seemed to work on any noise! One day, 4 cement trucks & 2 large pickups sat like 30 feet from my shack - all running, all working. The KNB2 did nothing to remove any of that man-made noise. Also it doesn't work on any band noise - that I ever found. I even got a 2nd KNB2, from Elecraft - and it didn't work either? The K2 itself - after build - operated true to all specs, calibrations, & alignments beautifully. I've since felt, the KNB2 is a design job left to be re-done, by some Elecraft designer, when they get around to it. The IC-7000's Noise Reduction and Noise Blanker circuitry - amazingly almost always reduces most band noises, real or imaginary, dramatically. Maybe in the K3? Fred N3CSY 8:00? 8:25? 8:40? Find a flick in no time with the Yahoo! Search movie showtime shortcut. http://tools.search.yahoo.com/shortcuts/#news ___ 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 Sidetone
Although I am not really a CW man I spent a few hours in the recent BERU contest. After a while I began to get a bit 'fed up' with the raspy sidetone, and looked at the reflector achieve for a solution. I saw that G3SJJ had recently done a mod that involved adding a small board to hold the components. I was almost about to go this route but found that this method of modification would likely get in the way of the K2DSP board that sits above it. So here is what I did. a) I removed C33 and L1. b) I soldered C33 (2.2uF) in the L1 position c) I stuck L1 to the BACK of the PCB close to C33 pads with double sided tape d) I soldered the (+) terminal of a 1uF capacitor to C33 (+) pad e) The other leg of the 1uF is soldered to L1 f) The circuit is completed by soldering a 100 ohm from L1 to C33 ( -) pad This way all components except the 2.2uF capacitor are now out of the way on the back of the control PCB. The improvement in sidetone quality achieved has been very noticeable. 73 Stewart G3RXQ ___ 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] K1 Question
I have just finished building the 4 band filter board ( KFL1-4) for the K1. I have 3 incorrect resistance checks that I cannot resolve. I'll do these one at a time for clarity's sake. The first is P1, pin 3 to pin 4. Desired reading is greater than 100k. I'm getting zero. Any suggestions ? Al ___ 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] BFO oscillator level
Matti, Rather than the BFO leaking directly into the AGC circuit, there is a much greater liklihood that the BFO signal is leaking into the IF amplifier, T7 or the IF crystals themselves, including the crystals on the KSB2 option. Once the BFO finds its way into those circuits, it will be coupled to the AGC input by the normal AGC Input signal path. I would suggest first steps to reduce BFO leakage would be to make certain all the crystal cans are grounded at the base (particularly the BFO and IF crystals) rather than at the top, and that the soldering at the grounding point be good - you should see the edge of the solder taper smoothly out onto the crystal case - if there is a distinct edge to the solder or it looks like a ball on the crystal can, the crystal can did not receive enough heat for a good solder connection. Clip all leads in the product detector and IF amplifier to the minimum possible (including the IC leads). If there is excess solder, it should be removed with solder wick or a de-soldering tool. With plated thru holes, there is no need for a fillet of solder at the connection - if the holes are filled with solder, that is sufficient. Before flush cutting the leads, it may ba a good idea to re-flow the soldering in the area with a soldering iron set to about 750 degrees F (400 C). Good luck. 73, Don W3FPR > -Original Message- > > I did some measurements on the BFO output level on my K2 #2024. > On U11 pin 6, I measured LSB: 596mV RMS, USB: 727mV RMS, CW: > 577mV RMS, using > the RF probe and a DVM. > > There has always been some BFO leakage into the AGC circuit. When I > adjust the S-meter LOW for 1 led lit on LSB, two leds will lit up on > USB, (40m band), I suspect this is caused by some leakage from > the BFO osc, > beeing a little more on USB than on LSB. > > Is there a simple way to reduce (or equalize) the BFO osc level, > say by half? > It would still be within specs (see page 11 Appendix E, on manual) > Best if the BFO level would not change when the BFO freq is changed. > > 73, de Matti > -- >Marteinn SverrissonTF3MA > Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is > 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma >Iceland > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/717 - Release Date: 3/10/2007 2:25 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] BFO oscillator level
I did some measurements on the BFO output level on my K2 #2024. On U11 pin 6, I measured LSB: 596mV RMS, USB: 727mV RMS, CW: 577mV RMS, using the RF probe and a DVM. There has always been some BFO leakage into the AGC circuit. When I adjust the S-meter LOW for 1 led lit on LSB, two leds will lit up on USB, (40m band), I suspect this is caused by some leakage from the BFO osc, beeing a little more on USB than on LSB. Is there a simple way to reduce (or equalize) the BFO osc level, say by half? It would still be within specs (see page 11 Appendix E, on manual) Best if the BFO level would not change when the BFO freq is changed. 73, de Matti -- Marteinn SverrissonTF3MA Langitangi 2Internet: tf3ma [at] raunvis [dot] hi [dot] is 270 Mosfellsbær http://www.raunvis.hi.is/~tf3ma Iceland ___ 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: K2 - 20m receive
Hi All, I’ve answered my own question !! just tweaked C21 and C23 and now have more ‘oomph’ on 20m RX, with same power output !!. Even though I’d tweaked these for max power output originally ?? Anyway, sorry for the bandwidth. Regards David _ From: David Douglass [mailto:[EMAIL PROTECTED] Sent: Sunday, 11 March 2007 8:32 PM To: 'elecraft@mailman.qth.net' Subject: K2 - 20m receive Hi All, I’ve have a suspect issue with low RX on 20m. The level of background noise on 20m is substantially lower than other bands, and in general the RX level on 20 seems down to other bands. I’ve suspected this of being the case for a while but just noticed more over this weekend in the BERU contest. I can still receive stations, and local VK and ZL still give strong signals (s9 plus), but I have a feeling something is amiss. The receive level on 20 is comparable with other bands with the pre-amp turned off (and before you ask, I have the pre-amp on). I have full power out (on K2 and K2/100) on 20 and therefore think that I have the alignment pretty much OK. Is there any parts in the 20m RX path that I should suspect that are specific to receive on this band, and not shared with TX or neighboring bands? I plan to do a full RX and TX alignment, once I have a good nights sleep, but thought I would check here first !! Thanks David, VK2NU -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/716 - Release Date: 9/03/2007 6:53 PM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/716 - Release Date: 9/03/2007 6:53 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] K2 - 20m receive
Hi All, I’ve have a suspect issue with low RX on 20m. The level of background noise on 20m is substantially lower than other bands, and in general the RX level on 20 seems down to other bands. I’ve suspected this of being the case for a while but just noticed more over this weekend in the BERU contest. I can still receive stations, and local VK and ZL still give strong signals (s9 plus), but I have a feeling something is amiss. The receive level on 20 is comparable with other bands with the pre-amp turned off (and before you ask, I have the pre-amp on). I have full power out (on K2 and K2/100) on 20 and therefore think that I have the alignment pretty much OK. Is there any parts in the 20m RX path that I should suspect that are specific to receive on this band, and not shared with TX or neighboring bands? I plan to do a full RX and TX alignment, once I have a good nights sleep, but thought I would check here first !! Thanks David, VK2NU -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/716 - Release Date: 9/03/2007 6:53 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
