OT P3 question
Locked
 
|
I have a couple of hams living .7miles and 1.3 miles from me.
On my P3 they both appear 6-8+ kc wide when viewed using the Peak function. They both run different amps varying in power from 400w to 800w I have spoken with them over the phone and while watching their signals they are able to cut down their audio to where they are only 3kc wide. One is still bumping S9 +40 and the other S9 +60 on the K3. They seem to think their audio is to low at that point, even though they are still given good reports out 300-600mi (on 80m) My question(s) they seem to think the only reason they appear that wide is because they are over powering my K3s front end. I think they are over driving their rigs audio. any comments on what could be happening here? Is it my K3/P3's fault they look that wide, or are they just wanting to see their meters swing up higher than they should, and so are actually over driving their rigs? TIA -- GB & 73 K5OAI Sam Morgan ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
I have a ham that lives within .5 miles of me who works primarily on VHF bands and has been written about in QST for his 6m prowess in contests. When he operates he takes up 25 kc on 6m and basically wipes out the ssb portion of the band and sometimes even more down into the top of CW portion.
As he is a famous vhf guy in the area i brought this up to some folks at hro and they say it must be the front end issue with my K3. I feel for your situation as I doubt there is much that I can do since he is so close and come contest time on 6m I don't even go on the band. Thank goodness he is not an HF guy. Keith AK6ZZ Sent from my iPhone please excuse typos On Feb 28, 2013, at 7:46 PM, "Sam Morgan" <[hidden email]> wrote: > I have a couple of hams living .7miles and 1.3 miles from me. > On my P3 they both appear 6-8+ kc wide when viewed using the Peak function. > They both run different amps varying in power from 400w to 800w > > I have spoken with them over the phone and while watching their signals > they are able to cut down their audio to where they are only 3kc wide. > One is still bumping S9 +40 and the other S9 +60 on the K3. > > They seem to think their audio is to low at that point, > even though they are still given good reports out 300-600mi (on 80m) > > My question(s) > they seem to think the only reason they appear that wide is because they are over powering my K3s front end. I think they are over driving their rigs audio. > > any comments on what could be happening here? > Is it my K3/P3's fault they look that wide, > or are they just wanting to see their meters swing up higher than they should, > and so are actually over driving their rigs? > > TIA > -- > > GB & 73 > K5OAI > Sam Morgan > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by k5oai
Just a guess...ICOM radios??
On 2/28/2013 9:46 PM, Sam Morgan wrote: > I have a couple of hams living .7miles and 1.3 miles from me. > On my P3 they both appear 6-8+ kc wide when viewed using the Peak > function. > They both run different amps varying in power from 400w to 800w > > I have spoken with them over the phone and while watching their signals > they are able to cut down their audio to where they are only 3kc wide. > One is still bumping S9 +40 and the other S9 +60 on the K3. > > They seem to think their audio is to low at that point, > even though they are still given good reports out 300-600mi (on 80m) > > My question(s) > they seem to think the only reason they appear that wide is because > they are over powering my K3s front end. I think they are over driving > their rigs audio. > > any comments on what could be happening here? > Is it my K3/P3's fault they look that wide, > or are they just wanting to see their meters swing up higher than they > should, > and so are actually over driving their rigs? > > TIA -- 73, Gary K9GS Greater Milwaukee DX Association: http://www.gmdxa.org Society of Midwest Contesters: http://www.w9smc.com CW Ops #1032 http://www.cwops.org ************************************************ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by k5oai
Sam,
I have operated my K3 during Field Day and listened to other stations at the same Field Day site without overloading the K3. As Ron points out, bring the signals down to an S-9 level with the preamp off and attenuation if necessary and then see what the P3 says about their width. I suspect they are overdriving their transmitter. 73, Don W3FPR On 2/28/2013 10:46 PM, Sam Morgan wrote: > I have a couple of hams living .7miles and 1.3 miles from me. > On my P3 they both appear 6-8+ kc wide when viewed using the Peak > function. > They both run different amps varying in power from 400w to 800w > > I have spoken with them over the phone and while watching their signals > they are able to cut down their audio to where they are only 3kc wide. > One is still bumping S9 +40 and the other S9 +60 on the K3. > > They seem to think their audio is to low at that point, > even though they are still given good reports out 300-600mi (on 80m) > > My question(s) > they seem to think the only reason they appear that wide is because > they are over powering my K3s front end. I think they are over driving > their rigs audio. > > any comments on what could be happening here? > Is it my K3/P3's fault they look that wide, > or are they just wanting to see their meters swing up higher than they > should, > and so are actually over driving their rigs? > > TIA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by k5oai
The way to resolve this is to compare to other signals. I see very nicely shaped signals with straight skirts within 3 KHz at times, and other signals that look like a pine tree.
A nearby ham lives less than 2 miles from me and runs an amp. Sometimes his signal is clean, and sometimes he overdrives. And when I see it wide, others with SDR pan adapters 150 miles away see it too. So it isn't a close-distance thing. Now that he has an SDR pan-adapter, he is more conscious of signal width. Years back, we operated under the threat of getting a pink ticket if we erred. Rich, n0ce ----- Original Message ----- From: Sam Morgan To: [hidden email] Sent: Thursday, February 28, 2013 9:46 PM Subject: [Elecraft] OT P3 question I have a couple of hams living .7miles and 1.3 miles from me. On my P3 they both appear 6-8+ kc wide when viewed using the Peak function. They both run different amps varying in power from 400w to 800w I have spoken with them over the phone and while watching their signals they are able to cut down their audio to where they are only 3kc wide. One is still bumping S9 +40 and the other S9 +60 on the K3. They seem to think their audio is to low at that point, even though they are still given good reports out 300-600mi (on 80m) My question(s) they seem to think the only reason they appear that wide is because they are over powering my K3s front end. I think they are over driving their rigs audio. any comments on what could be happening here? Is it my K3/P3's fault they look that wide, or are they just wanting to see their meters swing up higher than they should, and so are actually over driving their rigs? TIA -- GB & 73 K5OAI Sam Morgan ______________________________________________________________ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
A friend of mine is running his K3 with an ExpertK1 PA, controlled by RS232.
Now he wants to add a P3 to the line. I assume, some of you guys are using this combo. How did you realize controlling? Do you use Band Data ports on K3-ACC / Expert CAT, or is it possible to control all 3 by RS232? Any help welcome. 73 de Peter, DL2FI ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by k5oai
Sam,
I doubt the K3's front end is being overloaded. Since you're observing this in peak-hold mode on the P3, start at the *top* of the pedestal and note how wide the signal is. Then, move down the pedestal to where the signal begins to widen out. How far down do you get before it begins to get significantly wider? If it's about 30 to 35 dBm below the maximum signal level, then you're probably hearing and seeing fairly typical (unfortunately) ssb transmission artifacts. That S9+40 signal, will start to broaden out at probably around S9+5 or so, and the S9+60 signal will probably begin to broaden out at S9+25. Additionally, if they are over driving their amplifiers, the point at which their signal begins to widen could be higher than this. Six S-Units is 36 dB. If this signal was right at S9 (rather than S9++), the signal would likely begin to broaden at about the S3 level -- which on 80m may actually be below your noise floor -- so you'd never see it. You may want to consider using a device like the DX Engineering NCC-1, which can do a superb job of cancelling local noise sources. I would suspect that it would also do an excellent job of significantly reducing the level of these signals (though not both at the same time). 73, Dale WA8SRA On 2/28/2013 10:46 PM, Sam Morgan wrote: > I have a couple of hams living .7miles and 1.3 miles from me. > On my P3 they both appear 6-8+ kc wide when viewed using the Peak > function. > They both run different amps varying in power from 400w to 800w > > I have spoken with them over the phone and while watching their signals > they are able to cut down their audio to where they are only 3kc wide. > One is still bumping S9 +40 and the other S9 +60 on the K3. > > They seem to think their audio is to low at that point, > even though they are still given good reports out 300-600mi (on 80m) > > My question(s) > they seem to think the only reason they appear that wide is because > they are over powering my K3s front end. I think they are over driving > their rigs audio. > > any comments on what could be happening here? > Is it my K3/P3's fault they look that wide, > or are they just wanting to see their meters swing up higher than they > should, > and so are actually over driving their rigs? > > TIA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by k5oai
I have a ham who lives across the street from me. He uses an FT-920. If
I leave the antenna connected, he is all over the spectrum of the P3. I usually switch to the dummy load when I know he is going to transmit (we both check into the same HF net) and his spectrum is fine on the P3 at that point. 73, Joel - W4JBB I have a couple of hams living .7miles and 1.3 miles from me. On my P3 they both appear 6-8+ kc wide when viewed using the Peak function. They both run different amps varying in power from 400w to 800w I have spoken with them over the phone and while watching their signals they are able to cut down their audio to where they are only 3kc wide. One is still bumping S9 +40 and the other S9 +60 on the K3. They seem to think their audio is to low at that point, even though they are still given good reports out 300-600mi (on 80m) My question(s) they seem to think the only reason they appear that wide is because they are over powering my K3s front end. I think they are over driving their rigs audio. any comments on what could be happening here? Is it my K3/P3's fault they look that wide, or are they just wanting to see their meters swing up higher than they should, and so are actually over driving their rigs? TIA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by Keith Heimbold
* On 2013 28 Feb 21:56 -0600, Keith Heimbold wrote:
> I have a ham that lives within .5 miles of me who works primarily on > VHF bands and has been written about in QST for his 6m prowess in > contests. When he operates he takes up 25 kc on 6m and basically wipes > out the ssb portion of the band and sometimes even more down into the > top of CW portion. Ouch! > As he is a famous vhf guy in the area i brought this up to some folks > at hro and they say it must be the front end issue with my K3. I feel > for your situation as I doubt there is much that I can do since he is > so close and come contest time on 6m I don't even go on the band. Hmmm, HRO doesn't sell Elecraft, can't get in on the Elecraft action, ergo, blame the K3. Sounds about right. OTOH, it's easy to put a 20 dB pad ahead of your K3 and check his signal again. That should give a good idea of what is really going on. 73, de Nate, N0NB >> -- "The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true." Ham radio, Linux, bikes, and more: http://www.n0nb.us ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
|
|
In reply to this post by k5oai
Try hooking up to a dummy load or such rather than an antenn to get his
signal to a normal level say S9 at your end. see what it looks like then. If he is still wide then you know for sure. send him some captures or pictures of the screen. I have a fellow ham a block away. when we have a net on 10m he usually pushing close to about s9+60. I dont have a P3 yet but if I go up or down 3 or 4 KC I dont hear any splatter from him he is using an FT857 and no amp. proving that the K3 here handles it just fine. Its interesting at field day how signals from other rigs effect things. I run CW on my K3 on the same band as others on SSB. Ive never heard the kenwood TS440sat and nor could he hear me. the Old Icom not sure of the model. I hear some faint splatter only on 20m. he could not hear me. the FT101 was impossible regardless of band or antenna all I could here was S9_10 hiss if I was on his ban when he squeezed the mic. He argued with me that there was no way it was his rig at fault and that the K3 just couldn't handle it. Pride often gets in the way I guess. to avoid what was probably phase noise I Just calmly said fine and never worked the same band as him. This year there will be no FT101. I wish we could have all K3s David Moes [hidden email] VE3DVY On 2/28/2013 10:46 PM, Sam Morgan wrote: > I have a couple of hams living .7miles and 1.3 miles from me. > On my P3 they both appear 6-8+ kc wide when viewed using the Peak > function. > They both run different amps varying in power from 400w to 800w > > I have spoken with them over the phone and while watching their signals > they are able to cut down their audio to where they are only 3kc wide. > One is still bumping S9 +40 and the other S9 +60 on the K3. > > They seem to think their audio is to low at that point, > even though they are still given good reports out 300-600mi (on 80m) > > My question(s) > they seem to think the only reason they appear that wide is because > they are over powering my K3s front end. I think they are over driving > their rigs audio. > > any comments on what could be happening here? > Is it my K3/P3's fault they look that wide, > or are they just wanting to see their meters swing up higher than they > should, > and so are actually over driving their rigs? > > TIA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |