RE: [Elecraft] Peripatetic Morse Results
It started to get a bit cold 35F and my power dropped off to 2 W at the end, probably because my NiCads got cold. Yikes, you guys are crazy, I would get cold long before your nicads! I go in below 10 deg C! (It is now midday, with 32 deg C outside...) 73 de ZR6SW KX1 #251 ___ 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] KFL4 Problem
I've had K1 sn 1859 working well since March this year and enjoying it very much. About a week ago I was switching bands and found 20 meters pretty quiet and my output went to zero. All other bands 40, 30 and 17 are working properly. I quickly grabbed the Quick and Dirty Signal Tracing instructions and followed the signal all the way through and all was good but still no 20 meters. I'm convinced the problem is in the Pre-Mix filter but am not sure how to trace the signal through the pre-mix filter. As you can probably tell I know enough to be dangerous. Can anyone give me some hints about how to trace a signal through this filter. I had a problem on 30 meters in the pre-mix filter and luckily found a bad solder joint by wiggling components but that has not proved successful this time so I need to dig a little deeper and I don't have much test equipment only a DVM and an MFJ tuner/SWR/Power meter. I haven't had time to verify all the relays are switched in the right direction yet. Too much fun on 40 meters!! Thanks for any help you can give. Rick WA3TUU _ Dont just search. Find. Check out the new MSN Search! http://search.msn.click-url.com/go/onm00200636ave/direct/01/ ___ 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] KFL1-4 Problem
Rick wrote: ...K1 sn 1859 working well since March...I was switching bands and found 20 meters pretty quiet and my output went to zero. All other bands 40, 30 and 17 are working... The first thing I would do is exercise the trimmer caps (by turning the rotors CCW and CW several times) that are associated with the 20m filter circuits (C3, C4, CC, CD). Then perform a complete 20m band alignment per the manual. Sometimes these trimmer caps behave oddly, and this may cure your problem. If the other three bands work OK, then it's very unlikely to be a problem with the relays or the toroid transformers. There could be a bad solder connection between any of the above caps or their connections to relays K4 or K6. Good luck. Sounds like it'll have a simple fix whenever you find the culprit. 73, Mike / KK5F ___ 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] KPA 100 for sale
KPA 100 for sale (unbuilt new in the box latest version). Will sell for $ 350.00 with free shipping in the usa. E-mail with any questions [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] List of menu commands, queries
Yes. Its on our manual download page at the bottom. See: http://www.elecraft.com/manual/KIO2%20Pgmrs%20Ref%20rev%20E.pdf 73, Eric WA6HHQ --- Barry, Steve wrote: Is there a complete, in one file, list of all K2 commands and queries including the PA, SSB, DSP, etc. modules? ___ 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] Spectrogram help
I must be doing something wrong. Have my BFO settings exactly as specified in the K2 manual on CW. Using the noise gen from Elecraft. However, during the BFO settings per the K2 manual, FL2-FL4 at the BFO settings they specify results in almost no audio coming from the speaker using the N-gen. Then, when I go to spectrogram, my entire curve for FL1 is to the right of 600Hz on this display and no matter what I do with the vfo knob, there is no shifting of the curve to speak of and just changes in amplitude. On FL2-FL4, there is no amplitude at all but I can then adjust the VFO and see/hear the Ngen signals coming thru but the entire curve is still to the right of 600Hz. Running spectrogram off the headphone jack to my sound card. During operation, my CW mode audio level is considerably below the LSB or USB level and my receive CW signals seem to turn to clicks at audio freq below 800Hz or so.what have I missed? Thx K5GUS Dan ___ 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] Fundamental over load on 40 Meters
I have K2 number 4352. Finished it over the summer. Used with mediocre antennas to test out how it worked. All FB. Just moved my 2 element 40 meter beam up to 70 feet. Conditions on the band have been very good, and alas I get a signal every 10 KHz from 7000. KHz on up to 7060. KHz. Thought it was local problem. So I checked my Ten Tec 555, same thing. I heard the signals on exactly the same frequencies. Switched to the Pro II and no harmonic signal over load every 10 KHz. I know the AM SWL band could do this, or a very strong signal on the 40 meter band itself. I am copying some signals over the pass few days at 40 and 60 db over s9. Switched the K2 to the 80 meter dipole and the signals (signal) almost vanishes, and the rest of the band looses about 5 S units. The K2 benefits from switching the pre amp off, but still see the harmonic on those same frequencies. I'll keep checking each day. Maybe the SWL station will move, or end it's transmission. My questions are: Is this normal for the K2 on 40 meters under these conditions? Is there something I should re-check or maybe re-tune the band pass filters? Any suggestions would be appreciated. Whit K1EO ___ 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] Spectrogram help
Dan! Pick one filter and start playing with the bfo setting in cal fil. Note the change on spectrogram. Also change to speaker out on rear of the rig and adjust AF to suitable setting. The speaker output will give you full range on audiospectre. If you move bfo and it move wrong way? Simply move it the other way. But first you must decide what pitch you want on cw and begin from there. Pick fl2 and decide bandwith. Put markers in spectrogram. If you want 700bw on fl2 and pitch 600hz you put one marker 350hz below and one marker 350hz higher than 600hz on spectrogram. Now you adjust bfo until bandnoice is sentered within the two markers. Repeat with other modes and filters. Don't forget CW-r and RTTY-r. I think this will do it for you. Have a nice weekend Dan. Tom LA1PHA - Original Message - From: Dan Schieler [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Friday, November 05, 2004 8:11 PM Subject: [Elecraft] Spectrogram help I must be doing something wrong. Have my BFO settings exactly as specified in the K2 manual on CW. Using the noise gen from Elecraft. However, during the BFO settings per the K2 manual, FL2-FL4 at the BFO settings they specify results in almost no audio coming from the speaker using the N-gen. Then, when I go to spectrogram, my entire curve for FL1 is to the right of 600Hz on this display and no matter what I do with the vfo knob, there is no shifting of the curve to speak of and just changes in amplitude. On FL2-FL4, there is no amplitude at all but I can then adjust the VFO and see/hear the Ngen signals coming thru but the entire curve is still to the right of 600Hz. Running spectrogram off the headphone jack to my sound card. During operation, my CW mode audio level is considerably below the LSB or USB level and my receive CW signals seem to turn to clicks at audio freq below 800Hz or so.what have I missed? Thx K5GUS Dan ___ 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] Proper Use of the Preamp
Hi all, I have K2 #402, and am planning to upgrade it someday. But I was using it last night during the QRP-L fox hunt, and in its present state this K2 seems to be quite exceptional listening to weak signals (or static) on 40 meters. For most of the time, when I had actually located both of the foxes, they were in the noise most of these times. I finally got both by waiting until propagation got momentarily marginally better. My strategy was that I figured that propagation would either get better (50% chance) or worse (50% chance) and it was no use transmitting until I could copy most of what the fox was sending. Why send when you can't hear the fox give your call sign back?(HINT!!). Anyway since I was using all the performance my K2 could give me listening to mostly static, I tried putting the preamp off. It is usually on all the time. What I found was that I seemed to hear the fox better over the static with the preamp off, but the volume was too low. With the preamp on I had plenty of excess audio volume, but with the preamp off I didn't have enough volume I felt necessary. With the preamp on I also tried putting the af volume on full and then reducing the rf gain slightly. This actually helped but I sensed that using the rig with the preamp off and having a little extra volume would be significantly better. So I wonder if I need more af gain in the rig or maybe a little amp on the way to the headphones. Or maybe I am imagining things and somebody with more experience can set me straight. Thanks, Steve, W2MY/5 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.786 / Virus Database: 532 - Release Date: 10/29/2004 ___ 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] QRP'ers - Work WAS This Weekend
This weekend is a great weekend to work all states. The ARRL Sweepstakes starts Saturday at 2100 UTC. The exchange is: Serial No. + Precedence (Q/A/B/U/M/S) + [your call sign] + Check (year of 1st license) + ARRL/RAC Section Example: 0349 Q W6KY 58 SDGO There will be thousands of stations competing in all states with 'good' ears to hear those QRP signals. Sunday gets real easy with lots of stations calling CQ with few answers. Answer with 5 watts or less... Go to ARRLdotORG for all the rules.. Have fun, 73, Art W6KY K1-2 K1-4 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Proper Use of the Preamp
Unless you are using a very tiny, inefficient antenna (like a small loop or very short whip) on 40 meters, there's no reason at all to use the preamp, Steven. The purpose of the preamp is to improve the noise figure on the higher-frequency bands, not to make the receiver louder. It does that, of course, but that's a secondary benefit. The issue is that the 'atmospheric' or 'background' noise on the higher bands - usually above 15 MHz - can be so low the internal noise in the K2 receiver could mask signals. The easiest way to tell if that's true is to turn the preamp OFF, tune you K2 to an empty frequency so all you hear is noise, set the IF filter for the narrowest bandwidth you might use, and disconnect your antenna. If then background noise level drops when you disconnect the antenna, you do *not* need the preamp. The sensitivity of the K2 is entirely limited by the background noise. You need to use the narrowest bandwidth because the noise the receiver picks up is less the narrower the bandwidth. That's exactly why for a given power a CW signal will be stronger at the receiver end than an SSB signal, everything else being equal. The SSB signal needs a wider receive bandwidth so the receiver picks up more noise along with the signal. Your comments about low audio suggest another problem. The K2 is designed to minimize current drain because many of them are used with internal batteries. The designers included a relatively low current audio output I.C., but it should have enough output to rattle the phones or speakers on any band without the preamp! If both the speaker and phones are anemic, check your AGC action. Some K2's have overly aggressive AGC action that causes the AGC to limit the maximum volume. Look under Builder's Resources on www.elecraft.com or on Sverre's excellent site at http://tinyurl.com/4msw4 for more info about testing your AGC action. IF the speaker is plenty loud (none of them are loud enough to use in a noisy vehicle, but they are loud enough to be objectionable to most ops in a room on outdoors in a park, etc.) but the phones is weak, try a different set of phones. The K2 is designed for use with typical computer phones or walkman phones. They have a higher impedance (about 30 ohms I think) than the typical hi fi headphones. There are some resistors you can remove to improve the gain for lower-impedance hi-fi phones. That mod is also described on the above sites. You spoke of finding the copy of weak signals better by turning down the RF gain. A great many of us ... Er older tymers spent the first years or decades at a radio never using the AF gain. We controlled the output using the RF gain control. CW receivers didn't use AGC then either. The reason is what you found. Signals often seem to stand out better if the gain is controlled by the RF instead of the Audio gain. The K2 receiver is excellent, and the differences between using the audio gain (and AGC) and the RF gain are slight. Still, many of us prefer to use the RF gain on CW especially. Note that on the K2 there really is *no* RF Gain control as the term is used on older receivers. Originally, the RF gain meant a gain control that adjusted the gain of the first RF amplifier at the antenna input in the receiver. Since the K2 doesn't use such an amplifier (unless you turn the preamp ON), it adjusts the gain of the IF amplifier and calls that the RF gain control. But the effect is still much the same. Many of us like the clean sound we get when digging for a weak signal that way. One thing it does is that using the RF gain effectively disables the AGC. The AGC will tend to fill in the gaps in the CW signal by turning up the gain during breaks in the transmission. This tends to make the noise sound as loud as the signal when it really is not that loud. That is especially true if you are using FAST AGC action instead of SLOW. The SLOW action delays the 'pumping' action of the gain so as long as the CW station keeps sending the noise level stays down. Still, it's nice to forget the fancy AGC and do it by hand with the RF gain control for many ops. It sounds like the first step for you is to find out why you can't get enough audio without the preamp, then you can explore all the reasons to ignore the preamp and AF gain for most CW operating G. Ron AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steven Pituch Sent: Friday, November 05, 2004 1:17 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Proper Use of the Preamp Hi all, I have K2 #402, and am planning to upgrade it someday. But I was using it last night during the QRP-L fox hunt, and in its present state this K2 seems to be quite exceptional listening to weak signals (or static) on 40 meters. For most of the time, when I had actually located both of the foxes, they were in the noise most of these times. I finally got both by waiting until propagation got momentarily marginally better. My
[Elecraft] audio level
Steve, How about using headphones and more sensitive ones? -- Benny AUMALA OH9NB Ketuntie 1 D 10 96500 ROVANIEMIFINLAND tel +358 400 696 070 [EMAIL PROTECTED] [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] KPA 100 for sale
I've e-mailed Dane directly but wanted to be sure my dibs were posted in a public forum. Here is my official statement... I'LL TAKE IT! Tom K2TA - Original Message - From: Dane Morris [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Friday, November 05, 2004 1:00 PM Subject: [Elecraft] KPA 100 for sale KPA 100 for sale (unbuilt new in the box latest version). Will sell for $ 350.00 with free shipping in the usa. E-mail with any questions [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 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] KPA 100 for sale
Let me try this again...I forgot to reply to the Elecraft group. I've e-mailed Dane directly but wanted to be sure my dibs were posted in a public forum. Here is my official statement... I'LL TAKE IT! Tom K2TA - Original Message - From: Dane Morris [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Friday, November 05, 2004 1:00 PM Subject: [Elecraft] KPA 100 for sale KPA 100 for sale (unbuilt new in the box latest version). Will sell for $ 350.00 with free shipping in the usa. E-mail with any questions [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 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] C13, C14 Values RF board K2?
I'm experiencing low (7-8 watts) output on 160M on my used K2. All other bands run 12-18W. In manually inspecting each component for proper value I notice that the caps for C13 and C14 in my unit are labeled .001M. Now that would be 1,000pf. +/-20%, as low as 800pf or as high as 1200pf (if 20% error..maybe they are 10%?). Are these the original caps or am I once again facing part substitution by the previous 160M option builder? Tom K2TA ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Proper Use of the Preamp
Everyone, Thanks for the suggestions about my lack of sufficient audio with my K2, something I never really noticed until last night. One thing that rang a bell after reading everyone's input was that last night I also played around with the AGC controls and did not notice anything different with any setting. I have not experienced any pumping or increase in volume by say turning the AGC off. The rig has worked so well so far that perhaps I have not ever noticed that maybe the AGC hasn't ever worked. So I will check the AGC. I would think that the Elecraft team would have designed a kick ass kind of AGC, like many of the other quality designed parts of the radio. By the way my favorite head phones are my older Heil phones with mike which I have been using with the K2. To think that this radio easily beats my TS850, and that maybe I can fix something to make the K2 even better! Thanks again, Steve, W2MY/5 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.786 / Virus Database: 532 - Release Date: 10/29/2004 ___ 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] Spectrogram help
Dan, The BFO settings in the manual are only a starting point. You have to refine them for your particular K2. Since you already have the N-gen and Spectrogram, you have all the tools you need for the task. For detailed instructions on setting your filter/BFOs, look at my website www.qsl.net/w3fpr article on K2 Dial Calibration - the CAL PLL procedures are detailed in Step 3 of that article. Links are provided for additional information if you need it. 73, Don W3FPR - Original Message - I must be doing something wrong. Have my BFO settings exactly as specified in the K2 manual on CW. Using the noise gen from Elecraft. However, during the BFO settings per the K2 manual, FL2-FL4 at the BFO settings they specify results in almost no audio coming from the speaker using the N-gen. Then, when I go to spectrogram, my entire curve for FL1 is to the right of 600Hz on this display and no matter what I do with the vfo knob, there is no shifting of the curve to speak of and just changes in amplitude. On FL2-FL4, there is no amplitude at all but I can then adjust the VFO and see/hear the Ngen signals coming thru but the entire curve is still to the right of 600Hz. Running spectrogram off the headphone jack to my sound card. During operation, my CW mode audio level is considerably below the LSB or USB level and my receive CW signals seem to turn to clicks at audio freq below 800Hz or so.what have I missed? ___ 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] C13, C14 Values RF board K2?
The Correct values are 1200 pf. Do you have the manual? Have you downloaded the PDF file from Elecraft? If not you should and probably start by following the instructions for 160 Alignment on page 9. Rich, KE0X -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Althoff Sent: Friday, November 05, 2004 7:07 PM To: elecraft@mailman.qth.net Subject: [Elecraft] C13, C14 Values RF board K2? I'm experiencing low (7-8 watts) output on 160M on my used K2. All other bands run 12-18W. In manually inspecting each component for proper value I notice that the caps for C13 and C14 in my unit are labeled .001M. Now that would be 1,000pf. +/-20%, as low as 800pf or as high as 1200pf (if 20% error..maybe they are 10%?). Are these the original caps or am I once again facing part substitution by the previous 160M option builder? Tom K2TA ___ 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] C13, C14 Values RF board K2?
Thanks to you and Don W3FPR. Someone has been in this rig and has these ceramic caps scattered throughout the rig. C153 was 180pf ceramic (now the proper 100pf). C75 was wrong, and now C13 and C14 too. I'm going to order new 1200pf caps from Elecraft on Monday. I have the original manual and the latest one. Just finished the last of the mods (VFO ALC and KEYCLICK). The 160M low power problem is the last of my efforts to get this equal to a brandy-new 4,000+ serial # K2. If I can get the KPA100 and get it built and tested before the ARRL 160M contest in Dec I'll be a very happy camper. Wonder which gives me greater bragging rights...saying I built a K2 or repairing and upgrading one that someone else built? 8-) Again...I'm very thankful that this group is here for support! 73 de Tom K2TA - Original Message - From: Rich Lentz [EMAIL PROTECTED] To: 'Tom Althoff' [EMAIL PROTECTED] Cc: Elecraft Reflector elecraft@mailman.qth.net Sent: Friday, November 05, 2004 9:08 PM Subject: RE: [Elecraft] C13, C14 Values RF board K2? The Correct values are 1200 pf. Do you have the manual? Have you downloaded the PDF file from Elecraft? If not you should and probably start by following the instructions for 160 Alignment on page 9. Rich, KE0X -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Althoff Sent: Friday, November 05, 2004 7:07 PM To: elecraft@mailman.qth.net Subject: [Elecraft] C13, C14 Values RF board K2? I'm experiencing low (7-8 watts) output on 160M on my used K2. All other bands run 12-18W. In manually inspecting each component for proper value I notice that the caps for C13 and C14 in my unit are labeled .001M. Now that would be 1,000pf. +/-20%, as low as 800pf or as high as 1200pf (if 20% error..maybe they are 10%?). Are these the original caps or am I once again facing part substitution by the previous 160M option builder? Tom K2TA ___ 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] Proper Use of the Preamp
The AGC (if working correctly) and the dynamic range of that receiver is excellent. The great dynamic range is why you can get away with stuffing all those extra microvolts into the front end with the preamp ON without causing other problems. The AGC is typical of most rigs I've seen in recent years. It has good delay characteristics, but it is not a hang type AGC that picks an average level and stays there for a certain amount of time after the signal stops before a timer suddenly returns to volume to full level. I guess a lot of ops didn't like hang agc because if you were listening to a real strong signal with the audio up high, when the hang time expired it sounded like someone kicked on the biggest, baddest noise source in town! It was well in to the production of the K2 that it was discovered that minor in-tolerance variations in parts can, in some rigs, add up to an over-aggressive AGC action. Another major feature of the Elecraft rigs is that when something like that is discovered, they figure out a fix that can be retro-fitted to all K2's instead of saying Too bad, so sad. Sell it to someone and buy our new, improved (and more expensive) model next year... Ron AC7AC -Original Message- Everyone, Thanks for the suggestions about my lack of sufficient audio with my K2, something I never really noticed until last night. One thing that rang a bell after reading everyone's input was that last night I also played around with the AGC controls and did not notice anything different with any setting. I have not experienced any pumping or increase in volume by say turning the AGC off. The rig has worked so well so far that perhaps I have not ever noticed that maybe the AGC hasn't ever worked. So I will check the AGC. I would think that the Elecraft team would have designed a kick ass kind of AGC, like many of the other quality designed parts of the radio. By the way my favorite head phones are my older Heil phones with mike which I have been using with the K2. To think that this radio easily beats my TS850, and that maybe I can fix something to make the K2 even better! Thanks again, Steve, W2MY/5 ___ 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
