[Elecraft] K2 -Test part 11 problem
Hi There I'm building my first K2 . everythings went fine untill alignment- test part 11. 4 mhz cal. can't get the counter from changing rapidlyor showing right numbers.The probe tested out ok. Anyone know of where to look first ? Thanks Tim KD8DBO ___ 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] Power Output Regulation Issue
It's irrelevant what the output of an amp is because it's a function of gain. Meaning if you want 100W output and you have a rig capable of producing 10W output then you need at least a 10 to 1 ratio. The bread and butter of any transceiver is its receiver. If you can't hear em, you can't work em. Of course a properly designed transmitter is very important to ensure purity of signal. Elecraft has designed an excellent product that works better than most commercial amateur radio gear out there. Personally I keep going back to Elecraft because of the price features support and design. That's why I own all their transceiver products. The best reviews comes from the owners themselves and is evident not only on this group, but several others throughout the Internet. Regards, Robert VE3RPF Fred (FL) wrote: All the rave reviews, great reports, and extraordinary K2 reviews - always deal with the K2's receiver. Never much at all about the transmitter capability. From your readings, and QRP power levels - one would think it would be controlled better than your power meter/dummy load have shown? If one hangs a amplifier onto K2 - I wonder what the amp's output range would be? Fred, FL 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 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 BFO Test Problems
Hello to the group. I am currently working through the Alignment and Test, Part II and have run into the following issue. When I perform the BFO Test, I don't get the proper range. The set of values I get are: BFO High Freq.: 4917.31 kHz BFO Low Freq.: 4916.97 kHz Range: 0.34 kHz The documentation states that if the BFO range is less than 3.6 kHz, the varactor diodes (D37 and D38) or the crystals (X3 and X4) may be incorrect. However, I've verified them and they are correct. I've also gone around looking for bad soldering (cold joints or bridges) and didn't see anything obvious. I've checked the resistors and capacitors in the BFO section and they appear to be correct. Does anyone have any ideas of where I should look next? 73, Craig AC6NN ___ 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
I: [Elecraft] Power Output Regulation Issue
Well, I own a very good transceiver (IMHO at least; an Icom IC-781) permanently connected to a vintage but outstanding Collins 30L-1 Linear Amplifier. I have to say that i work only in CW. There i will have about 100W barefoot, and about 400W if i switch on the 30L-1. What i use for everyday's QSO activity is my Elecraft K2, the barefoot version with about 10W output. Now, we must keep in mind that every time we double the TX power, on the receiving side there will be an increade of HALF an S-point. So, if my Icom-781 with the 30L-1 amplifier on (400 W) will arrive somewhere at S9, it will arrive at S8 if i switch off the amplifier (dividing the power by two TWICE, so one full S-unit is gone). Now, if i repeat the process, i will find that with a power output of 25W I will be received at S7, and my nice Elecraft K2 will be received between S6 and S7. Now it all depends on the receiving station. If he has a decent antenna, and lives in a place where the background noise is acceptable (let say S2 to S3) my K2 signal will pop-up about 4 S-points above the noise; and any decent OM will be able to copy it without any problem... So, what is the reason for owning a 400W transmitter? Well, IF the receiving station is located downtown on a major city or in the middle of a railway yard, THEN his background noise will be around S8, and now you see the ONLY reason for switching on my BIG transceiver... And now, the Coup-de-Grace. I own a KX-1 as well; on a 12V power supply it pumps out about 3 Watts, and the receiver quality it's really outstanding. If i hear somebody calling CQ from an Eastern Europe country, where there is a good chance that the background electrical noise will be not so bad (most of the times, on my request it was reported at S1) i can bet on my KX-1 being heard at first attempt; I still will arrive there with a S5 signal, or maybe S4, but well above the noise level. And i can tell you that NOTHING compares with the satisfaction of a making a QSO with a station located at thousands of kilometers away, made with a station smaller than my Vibroplex, all including. Believe me, power is nothing. The quality and the taste of a pudding does not relate to the weight of the ingredients. Cheers, IK4YNG Paolo ___ 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] C22 page 65 question
___ 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] C22 Page 65 Question
I saved this till last. I only have 2 caps left in my tray. On page 65 it says that C22 is a 3.3 pf (3.3) in value.. I dont have that particular cap..but...on page 1 of appendix A for the K2 RF board it says C22 is 2.7pf ( alt 3. or 3.3pf) and its an NPO type.. The last cap i have is a real little blue ceramic type one with 2.7c on one side and 1a on the other side. Is this cap they mean? WB0OMR... ___ 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 RF Gain Control question
Todd, that sounds like a noisy pot in which the wiper isn't making good contact with the resistive element inside. When you touch it, the circuit opens briefly, which is the same as turning the RF Gain all the way to minimum. That will cause the S-meter to read full scale. The delay returning to normal should be the AGC decay rate. If you tap AGC to switch to FAST, it should recover much more quickly. One fix is to put a few drops of a control lubricant on the control shaft with the rig standing front panel upward so the lubricant will run into the pot. Turn it a number of times to work it down into the resistive element. I use Caig DeOxit for that. It comes in a small squeeze bottle with a hollow needle applicator. Recommend you avoid any sprays. They get stuff all over the place. If a spray is all you have, recommend you spray onto a small screwdriver shaft or length of wire it to collect drops of liquid on the wire or screwdriver shaft. Work away from the rig with a towel behind the sprayer to catch the overspray. Then position the wet wire or screwdriver shaft so the drops run down onto the pot shaft and into the pot itself. If it's a stubborn case, you may need to replace the pot. Ron AC7AC -Original Message- I just noticed that whenever I touch my RF gain control knob for adjustment the S meter jumps completely to the right and VERY slowly drops to whatever level of RF gain I have set. It takes several seconds for the receiver to come back to the point where it can receive again. I have used other K2's and this has not been the case. Can someone else tell me if they see this happening. I probably haven't explained this very well but would be glad to explain this more if needed. Thanks, WA7U Todd ___ 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 RF Gain Control question
Thanks Tom, I suspect the gain pot is defective. I will check soldering also. I'll get an RF gain pot on the way and try swapping it out also. Todd ___ 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 RF Gain Control question
Spraying the chemical onto/into a Q-tip and then squeezing it out by pressing the cotton against the upward-pointing shaft will avoid the splattering. 73! Ken Kopp - K0PP (K2 #5665) [EMAIL PROTECTED] or [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] K2 RF Gain Control question
The lube is a good place to start Ron. Thanks. I have noticed that just touching the RF knob causes this to happen so you are probably on to something here. I don't have a lube other than tri-flow but will look for something like what you mentioned. Todd ___ 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 RF Gain Control question
How interesting. My #1126 K2 does exactly as you described Todd. Although I rarely change the rf control level, I've always wondered why my K2 behaved this way. It'll be interesting to see what kind of comments your question brings. 73, Rod K5BGB Licensed June 1955 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Gahagan Sent: Sunday, February 18, 2007 10:18 AM To: Elecraft Reflector Subject: [Elecraft] K2 RF Gain Control question I just noticed that whenever I touch my RF gain control knob for adjustment the S meter jumps completely to the right and VERY slowly drops to whatever level of RF gain I have set. It takes several seconds for the receiver to come back to the point where it can receive again. I have used other K2's and this has not been the case. Can someone else tell me if they see this happening. I probably haven't explained this very well but would be glad to explain this more if needed. Thanks, WA7U Todd ___ 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 preamp attenuator combos
I'm writing some rig control code for the K2 and came across this in the KIO2 manual at the PA command: Note: the preamp and attenuator can be turned on simultaneously under computer control to provide four different RF gain levels. Two variables each with two settings gives you four combinations. Easy enough, but does it really buy you anything to turn on both the attenuator and the preamp simultaneously? 73, Mike ab3ap ___ 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: KX-1 Straight Key
K4ELV: You need to have a 3 pole plug on the straight key, even though only the ground and tip are used. I am not sure about the menu issue. I fussed with the two pole vs three pole plug issue myself, but it did no damage or lasting troubles to the KX-1 when I was trying the two pole plug. -Brian KNØN ___ 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 preamp attenuator combos
Mike - I have seen rig control programs use the four combinations to simulate four steps of volume control since the volume knob can't be changed by computer control. 73 de K1ESE John Mike Markowski wrote: I'm writing some rig control code for the K2 and came across this in the KIO2 manual at the PA command: Note: the preamp and attenuator can be turned on simultaneously under computer control to provide four different RF gain levels. Two variables each with two settings gives you four combinations. Easy enough, but does it really buy you anything to turn on both the attenuator and the preamp simultaneously? 73, Mike ab3ap ___ 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 preamp attenuator combos
In the real world, there's not much advantage to using both the attenuator and preamp together. The preamp offers about 14 dB gain. The attenuator offers about 10 dB attenuation, so using both of them produces an effective preamp gain of about 3 dB. Since the purpose of the preamp is to provide enough gain to override internal mixer noise on the higher frequencies where band QRN is very low, and the purpose of the attenuator is to reduce the gain when band QRN is very high to improve the dynamic range of the receiver, using both of them gives you the ability to tweak the gain slightly by 3 dB instead of steps of about 10 to 15 dB. That might be useful when trying to keep the gain down to the absolute minimum needed to avoid overload where several rigs are working next to each other, such as a field day setup, but that's about the only situation where I could envision that such fine adjustment might be of value. Ron AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Markowski Sent: Sunday, February 18, 2007 10:22 AM To: Elecraft Subject: [Elecraft] K2 preamp attenuator combos I'm writing some rig control code for the K2 and came across this in the KIO2 manual at the PA command: Note: the preamp and attenuator can be turned on simultaneously under computer control to provide four different RF gain levels. Two variables each with two settings gives you four combinations. Easy enough, but does it really buy you anything to turn on both the attenuator and the preamp simultaneously? 73, Mike ab3ap ___ 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] C22 Page 65 Question
Yes, that is the one. There is one problem with a manual being too specific about the appearance of a component, particularly capacitors. If the capacitor manufacturer changes colors or the kit producer changes vendors for a part for any reason, then the manual is no longer correct. In this case, the 2.7 pf cap (or 3.0 or 3.3 pf alternates) has changed to a monolythic cap - it is probably better than the disc, but the manual picture and part description is now incorrect - it is tough keeping up with all these changes. The only solution I know about is for the builder to acquaint himself/herself with the various ways capacitors are marked so we can 'sway with the punches' that are bound to happen over time. Just for additional general information, mono C0G types capacitors and the disc NPO types are interchangable. The NPO designation is slowly being phased out and C0G substituted by many manufacturers. 73, Don W3FPR -Original Message- I saved this till last. I only have 2 caps left in my tray. On page 65 it says that C22 is a 3.3 pf (3.3) in value.. I dont have that particular cap..but...on page 1 of appendix A for the K2 RF board it says C22 is 2.7pf ( alt 3. or 3.3pf) and its an NPO type.. The last cap i have is a real little blue ceramic type one with 2.7c on one side and 1a on the other side. Is this cap they mean? -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: 2/17/2007 5:06 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] KX1 page 26
Assembly Part 1 complete resistance checks completed http://www.kc5wa.us/kx1/1727-05.jpg infinity readings (although correct ) for banded end of D2 or D3 with S1 on or off does not feel right? RC kc5wa ___ 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] KX1 page 26
RC, The resistance from the cathode of D2 or D3 to ground with S1 on will depend a lot on your meter and the polorization of its leads. To convince yourself all is OK, try the reading at the open contact of Sw (should be zero ohms, then on the ends of R23 (one end shoudl be zero and the other end should be 470 ohms, then at the legs of D1 - one side shoudl be 470 ohms and the other side should be the same as you see at the D2/D3 cathodes. If all things are not that way, then you have something connected wrong or a bad solder connection. The schematic is easy to follow for this portion of the checks, look in the upper right corner for D2/D3 and follow the path down the page through D1 and R23 and S1. 73, Don W3FPR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of RC Sent: Sunday, February 18, 2007 2:57 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] KX1 page 26 Assembly Part 1 complete resistance checks completed http://www.kc5wa.us/kx1/1727-05.jpg infinity readings (although correct ) for banded end of D2 or D3 with S1 on or off does not feel right? RC kc5wa ___ 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: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: 2/17/2007 5:06 PM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: 2/17/2007 5:06 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] DSP terminology question
Can anyone explain terminology associated with the DSP unit. It's difficult to know which way to begin adjusting individual areas of the DSP without understanding. At least for me. I realize I could fiddle with them and listen for change, but I'm not comfortable with that without a little knowledge going in. Terms such as: 1. soft filtering and standard filtering 2. Adjusting the Beta (aggressiveness) in the Denoiser 3. Adjusting the hold/decay time of the filter in Denoiser 4. The same in the autonotch 5. I guess I'm unclear what effect the autonotch is having on the signal in SSB. It is difficult to detect any difference with it on or off. 6. Denoiser Gain sttings and there effect. 7. Filter gain and balancing the audio gain. I guess I need an expert in all things DSP. I just want to understand them better before tinkering with them. Thanks in advance if there is info available from anyone. Dohn N8EWY ___ 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] DSP terminology question
Can anyone explain terminology associated with the DSP unit... 1. soft filtering and standard filtering Standard has steeper skirt selectivity. 2. Adjusting the Beta (aggressiveness) in the Denoiser 3. Adjusting the hold/decay time of the filter in Denoiser 4. The same in the autonotch See the KDSP2 Manual Glossary pages 45 and 46 for a definition of these terms. The easiest way to translate these definitions into understanding is to listen to some signals and change the parameter from 99 to 00 and back (just one tap does it). You'll then get a good idea what each parameter does. 5. I guess I'm unclear what effect the autonotch is having on the signal in SSB. It is difficult to detect any difference with it on or off. If there is no carrier to notch, then it will do very little. Tune in the 4 MHz birdie on the K2 in SSB mode. Then turn the autonotch on and off and you'll hear what it is doing. The, with it turned on, vary a parameter between 00 and 99 and then tune the radio 100 Hz or so and listen to how it cancels the tone. After you tune with all four combinations 00/99, 99/99, 99/00 and 00/00) you should have a pretty good idea what these parameters do. In general, I leave autonotch on to eliminate annoying carriers while I tune around in SSB mode. 6. Denoiser Gain sttings and there effect. Leave CW set a 0.0 dB. Goto SSB and tune in a voice signal. Turn the denoiser on and then adjust the SSB denoiser gain so the voice audio is about the same when you turn the denoiser on and off. 7.0 dB is reasonably close for more normal settings of the Denoiser parameters. 7. Filter gain and balancing the audio gain. These are present for audio balancing purposes and normally will just be left at 0.0 dB. DO NOT USE THE FILTER GAIN MENUS TO INCREASE THE OVERALL GAIN OF THE K2! If you do, you may have too much gain with strong signals, especially if the AGC is turned off. I guess I need an expert in all things DSP. I just want to understand them better before tinkering with them. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT: LPFM transmitter wanted
Folks, I found a dizzying array of items on the web, from MP3 device attachments to rather high quality exciters for neighborhood broadcasting. Anybody have a suggestion or two for a decent quality rig that couples to an MP3/CD-player, stereo...etc. Only need to get the signal 50-100ft or so. Off list replies please, probably not of general interest to the list. TIA -- Rod, Ai7NN ___ 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] no K2 Receive
I think I have a receive problem. Just completed the last stage of the K2. I have a 20M receiver that is pickin up ssb on 14.250 ish... nice and strong. The K2 hears nothing. I have a MFJ-207 and I set it to generate a 14mhz signal and the K2 can find that signal..but its sitting right next to the rig so I must be seriously atten. my RF somewhere. any ideas? all the xmitt tests work for 2, 5, and 10 wat output. my dummy load gets warm so I am putting out rf... all the buttons work.. keyer works..everything but no receive.. WB0OMR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] OT: LPFM transmitter wanted
On Sun, 18 Feb 2007 15:19:28 -0800, Rod Ai7NN wrote: I found a dizzying array of items on the web, from MP3 device attachments to rather high quality exciters for neighborhood broadcasting. Anybody have a suggestion or two for a decent quality rig that couples to an MP3/CD-player, stereo...etc. Only need to get the signal 50-100ft or so. A LPFM station is in fact a broadcast station requiring a FCC license therefor, with all the rules and obligations pertaining thereto. It is not a hobby or consumer operation. Regarding what you have in mind, unless the non-licensed device is CERTIFIED for operation in compliance with FCC Rules Part 15, you risk losing your ham license for unauthorized operation. I spent 30 years with the FCC tracking down and putting such unauthorized devices off the air. I'm sure that with a little effort you can find a certified device - they do exist for exactly what you want - but much of what you find on the 'net is not certified. Off list replies please, probably not of general interest to the list. It should be of interest to all licensed amateurs. -- 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 ___ 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] no K2 Receive
We don't have enough information to tell you where to look, it will take a bit of troubleshooting just to discover where to start. The first step is to see what part of the receiver is alive. Do you hear any noise at all with the AF and RF Gains turned up all the way? If so, there is something there, if not the troubleshooting gets more complicated, so stop and let us know so we can advise on test techniques for the audio section. If you do hear something with the gains all the way up, the easiest next step is to try the Quick and Dirty Signal Tracing that is available for download from the Builder's Resource page of the Elecraft website. Should you not find the failing stage following that document, you will have to resort to following the Receiver Signal Tracing shown in Appendix E of the manual. There is a strong oscillator schematic shown there and you should consider building it to aid in your signal tracing. You can build it easily on a perfboard or even solder the parts together with 'flying leads' - I built mine 'Ugly Construction' style on a small (3/4 inch x 1 1/4 inch) piece of unetched PC board - I used a screwdriver adjust trimmer for the output pot. 73, Don W3FPR -Original Message- I think I have a receive problem. Just completed the last stage of the K2. I have a 20M receiver that is pickin up ssb on 14.250 ish... nice and strong. The K2 hears nothing. I have a MFJ-207 and I set it to generate a 14mhz signal and the K2 can find that signal..but its sitting right next to the rig so I must be seriously atten. my RF somewhere. any ideas? all the xmitt tests work for 2, 5, and 10 wat output. my dummy load gets warm so I am putting out rf... all the buttons work.. keyer works..everything but no receive.. WB0OMR -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: 2/17/2007 5:06 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] OT: LPFM transmitter wanted
Perhaps a (legal) wireless microphone would meet the requirement. Radio Scrap sells them. As Phil has already cautioned ... don't endanger your license! 73! Ken Kopp - K0PP [EMAIL PROTECTED] or [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
[Elecraft] K2 to antenna Power
Good evening Elecrafters, may your Monday be a restfull one! I would like to send a low voltage limited current up the coax from my K2 to the antenna for powering a small device. What would be the best way to inject this voltage into the antenna feed (coax) at the K2 and recovering it up the stack? I was hoping to continue supplying this voltage even while transmitting 100 watts. I thought that the transverter manuals might have some advice about powering preamps but, not a word. Best regards, Bob K7HBG. K2# 2836 which Will only be pried from my cold dead fingers ___ 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 to antenna Power
You need as a minimum a capacitor in the coax center lead to your K2 in order to prevent DC from getting into the radio. Second you will need a choke on your low voltage supply at a value that presents a large impedance to RF frequencies you are operating on and therefore blocking RF from entering your small supply voltage. There really should be other components to ensure a fairly flat impedance reading across the bands you wish to operate. The Handbook should have some examples of this. Regards, Robert VE3RPF [EMAIL PROTECTED] wrote: Good evening Elecrafters, may your Monday be a restfull one! I would like to send a low voltage limited current up the coax from my K2 to the antenna for powering a small device. What would be the best way to inject this voltage into the antenna feed (coax) at the K2 and recovering it up the stack? I was hoping to continue supplying this voltage even while transmitting 100 watts. I thought that the transverter manuals might have some advice about powering preamps but, not a word. Best regards, Bob K7HBG. K2# 2836 which Will only be pried from my cold dead fingers ___ 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 BFO Test Problems
Hello again, I've continued my troubleshooting efforts but the problem persists. I had reflowed all connections except those of X3, so I removed L33 and R116 to do so. Everything appears to be well connected and I don't see any shorts. I checked the DC voltages on U11 using the internal probe and have the following values: Pin 1: 1.4 Pin 2: 1.4 Pin 3: 0.0 Pin 4: 4.8 Pin 5: 4.8 Pin 6: 5.6 Pin 7: 5.0 Pin 8: 6.0 I used the RF probe to check the voltages with the following results: U11, pin 6: 0.74 TP2:0.024 The DC voltages for U11 pins 6 and 7 are a bit low and the RF probe values are on the edges. Is it possible that U11 is bad? 73, Craig On 18 Feb, 2007, at 10:46, Craig Young wrote: Hello to the group. I am currently working through the Alignment and Test, Part II and have run into the following issue. When I perform the BFO Test, I don't get the proper range. The set of values I get are: BFO High Freq.: 4917.31 kHz BFO Low Freq.: 4916.97 kHz Range: 0.34 kHz The documentation states that if the BFO range is less than 3.6 kHz, the varactor diodes (D37 and D38) or the crystals (X3 and X4) may be incorrect. However, I've verified them and they are correct. I've also gone around looking for bad soldering (cold joints or bridges) and didn't see anything obvious. I've checked the resistors and capacitors in the BFO section and they appear to be correct. Does anyone have any ideas of where I should look next? 73, Craig AC6NN ___ 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 BFO Test Problems
Craig, The problem is most likely in one of the following areas: 1) The L33 inductor 2) The varactors 3) The crystals themselves. The very most likely problem is a poor solder connection, and the second most likely is misplaced components. The DC voltages look to be within reason, and it is probably not the fault of U11. We can get to precise measuremnts tomorrow, it is getting late here today. 73, Don W3FPR -Original Message- Hello again, I've continued my troubleshooting efforts but the problem persists. I had reflowed all connections except those of X3, so I removed L33 and R116 to do so. Everything appears to be well connected and I don't see any shorts. I checked the DC voltages on U11 using the internal probe and have the following values: Pin 1:1.4 Pin 2:1.4 Pin 3:0.0 Pin 4:4.8 Pin 5:4.8 Pin 6:5.6 Pin 7:5.0 Pin 8:6.0 I used the RF probe to check the voltages with the following results: U11, pin 6: 0.74 TP2: 0.024 The DC voltages for U11 pins 6 and 7 are a bit low and the RF probe values are on the edges. Is it possible that U11 is bad? 73, Craig On 18 Feb, 2007, at 10:46, Craig Young wrote: Hello to the group. I am currently working through the Alignment and Test, Part II and have run into the following issue. When I perform the BFO Test, I don't get the proper range. The set of values I get are: BFO High Freq.: 4917.31 kHz BFO Low Freq.: 4916.97 kHz Range: 0.34 kHz The documentation states that if the BFO range is less than 3.6 kHz, the varactor diodes (D37 and D38) or the crystals (X3 and X4) may be incorrect. However, I've verified them and they are correct. I've also gone around looking for bad soldering (cold joints or bridges) and didn't see anything obvious. I've checked the resistors and capacitors in the BFO section and they appear to be correct. Does anyone have any ideas of where I should look next? 73, Craig AC6NN ___ 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: 2/17/2007 5:06 PM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: 2/17/2007 5:06 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] Sked
Fellow Elecrafters: I am trying to get 80 m QRP WAS with my K2. I have all states but Alaska and Idaho. I was wondering if there are list members in either state who would consider scheduling a contact with me. 73, Steve AA4AK ___ 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 - not able to align..
when i ordered my k2, i also ordered the noise generator... i ordered this to help align my k1 that i have been having problems with.. on the k1, i am missing all sorts of signals that my cheapie regen receiver is hitting loud and clear.. i am not sure what i am supposed to hear from the noise generator, but it sorta sounds like loudish static, BUT. even connecting the output to the input of my regen, i don't really hear anything.. anyway.. i had the internal tuner installed, so i took it out, and jumpered the board back to k1.. then, i put jumpred pins 2 and 10 on j2(i think it's j2)... anyway... on all bands but 18mhz, i just can't seem to peak the receiver.. 18mhz peaks really well.. and i am comfortable that it's correct.. the rest are just guesses.. anyone have any ideas? thanks! -- ___ peace, sergio photographer, journalist, visionary www.village-buzz.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 - changing to 80 khz range..
while i have my k1 opened to the hilt.. i am thinking about making a few more changes. i think i made a few bad judgment calls when first built the radio.. i would like to: change to the 80khz range.. change the edge of 18hmz to 18.1mhz.. i could probably backtrack and make the change, but i would rather find something that is spelled out for me so i don't goof anything up by overlooking something.. is there such a document out there that elecraft puts their seal of approval on? thanks! -- ___ peace, sergio photographer, journalist, visionary www.village-buzz.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
