Receiver distortion
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Greetings All,
lately I have noticed that sometimes the main receiver sounds distorted when signals are not even very strong (S5-7) without having Notch, NR, NB or wide filter active and AGC is on slow. I am curious if anyone else has experienced this audio degradation? I have had a play while this is happening with the width, Hi and Lo cut, shift and volume but it appears to have little effect. The NB is not used. Regards, Gary #679 K3/100 _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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Gary
Tell us about your speaker system. The K3 has the cleanest receive audio I've see thusfar. Steve Ellington [hidden email] ----- Original Message ----- From: "Gary Gregory" <[hidden email]> To: <[hidden email]> Sent: Sunday, May 11, 2008 9:19 PM Subject: [Elecraft] Receiver distortion > Greetings All, > > lately I have noticed that sometimes the main receiver sounds distorted > when > signals are not even very strong (S5-7) without having Notch, NR, NB or > wide > filter active and AGC is on slow. > > I am curious if anyone else has experienced this audio degradation? > > I have had a play while this is happening with the width, Hi and Lo cut, > shift and volume but it appears to have little effect. The NB is not used. > > Regards, > Gary > #679 > K3/100 > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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. Version: 8.0.100 / Virus Database: 269.23.16/1427 - Release Date: 5/11/2008 1:08 PM _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Gary Gregory-3
Now you come to mention it, I believe that the received audio on
my K3 does not sound quite as clean as when the rig was built. Signals that sound smooth on my TS-850s and K2 (both using internal speakers) have an edge to them on the K3. Perhaps an Audiophile on the reflector can comment ? 73 Stewart G3RXQ K3/100 #307 On Mon, 12 May 2008 11:19:22 +1000, Gary Gregory wrote: > Greetings All, > > lately I have noticed that sometimes the main receiver sounds distorted when > signals are not even very strong (S5-7) without having Notch, NR, NB or wide > filter active and AGC is on slow. > > I am curious if anyone else has experienced this audio degradation? > > I have had a play while this is happening with the width, Hi and Lo cut, > shift and volume but it appears to have little effect. The NB is not used. > > Regards, > Gary > #679 > K3/100 > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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: [hidden email] 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 |
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On 5/12/08, Stewart Baker <[hidden email]> wrote:
> Now you come to mention it, I believe that the received audio on > my K3 does not sound quite as clean as when the rig was built. > Signals that sound smooth on my TS-850s and K2 (both using > internal speakers) have an edge to them on the K3. > > Perhaps an Audiophile on the reflector can comment ? > Yeah, I wonder sometimes. I was listening to 75 meters last night on my Drake 2A and the XYL asked why it sounded so clear (compared to what she had been hearing on the K3). I put the K3 back on, and maybe it did sound a little rough, on the same Motorola speaker even. I tried to set the bandwidth so it sounded the same as on the Drake. It's hard to say for sure. The K3 should sound better than a 756ProIII and the other DSP radios, didn't someone say? Dave W5DHM _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Gary Gregory-3
I also notice slightly rough audio. It's subtle, but I believe
something went wrong after the last FW upgrade. Windy KM5Q K3 #764 _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by N4LQ-2
I'm likewise a bit skeptical (but I could be wrong) about the alleged K3 rx audio issues. My experience is that the K3 rx audio is more "transparent" and thus any problems with the other guy's audio will be glaringly apparent with the K3. This might be what some people are hearing - the bad signals are going to sound "badder" on the K3. The K3 rx is less "forgiving" because you are hearing better. I do seem to be noticing how bad most signals sound on 20M ssb lately, although there is the occasional smooth sounding signal. I routinely A/B with my Orion to confirm what I'm hearing. Perhaps folks who are reporting audio issues with the latest firmware can make some WAV recordings that we can listen to, with the "good" and "bad" firmware versions. 73, Barry N1EU |
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I did a quick test using my K3 and 756ProIII. With an input of S9+40dB and
the K3's Rx frequency set to 14.200000, I set the signal generator for 14.201500 (for a 1500Hz tone). The K3 seems to have about the same max output whether using the Line Out or Speaker Out (on the rear of the radio), and it is less than +/- 8000 (using Adobe Audition. My 756ProIII has a Line Out of greater than +/- 14000. Of course when the waveform starts clipping, you can hear the distortion, which I can also see on the Adobe Audition frequency analysis display. BTW, when I rotate the RF GAIN control on my K3 full counter-clockwise, it doesn't make it up to S9+60db! Anybody else notice this? As a result, a 50mV input will not show S9+60dB. John N2KBE ----- Original Message ----- From: "Barry N1EU" <[hidden email]> To: <[hidden email]> Sent: Monday, May 12, 2008 12:21 PM Subject: Re: Re[Elecraft] ceiver distortion > > > n4lq wrote: >> >> The K3 has the cleanest receive audio I've see thusfar. >> > I'm likewise a bit skeptical (but I could be wrong) about the alleged K3 > rx > audio issues. My experience is that the K3 rx audio is more "transparent" > and thus any problems with the other guy's audio will be glaringly > apparent > with the K3. This might be what some people are hearing - the bad signals > are going to sound "badder" on the K3. The K3 rx is less "forgiving" > because you are hearing better. I do seem to be noticing how bad most > signals sound on 20M ssb lately, although there is the occasional smooth > sounding signal. I routinely A/B with my Orion to confirm what I'm > hearing. > > Perhaps folks who are reporting audio issues with the latest firmware can > make some WAV recordings that we can listen to, with the "good" and "bad" > firmware versions. > > 73, > Barry N1EU > > -- > View this message in context: > http://www.nabble.com/Receiver-distortion-tp17180061p17189855.html > Sent from the Elecraft mailing list archive at Nabble.com. > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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: [hidden email] 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 |
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Rotating my RFG counter clockwise caused the meter to peg at the 3 dot on
the knob scale. Something is wrong there. Steve Ellington [hidden email] ----- Original Message ----- From: "John Trager" <[hidden email]> To: "Barry N1EU" <[hidden email]>; <[hidden email]> Sent: Monday, May 12, 2008 3:55 PM Subject: Re: Re[Elecraft] ceiver distortion >I did a quick test using my K3 and 756ProIII. With an input of S9+40dB and > the K3's Rx frequency set to 14.200000, I set the signal generator for > 14.201500 (for a 1500Hz tone). > > The K3 seems to have about the same max output whether using the Line Out > or > Speaker Out (on the rear of the radio), and it is less than +/- 8000 > (using > Adobe Audition. > > My 756ProIII has a Line Out of greater than +/- 14000. > > Of course when the waveform starts clipping, you can hear the distortion, > which I can also see on the Adobe Audition frequency analysis display. > > BTW, when I rotate the RF GAIN control on my K3 full counter-clockwise, it > doesn't make it up to S9+60db! Anybody else notice this? As a result, a > 50mV input will not show S9+60dB. > > > John > N2KBE > > ----- Original Message ----- > From: "Barry N1EU" <[hidden email]> > To: <[hidden email]> > Sent: Monday, May 12, 2008 12:21 PM > Subject: Re: Re[Elecraft] ceiver distortion > > >> >> >> n4lq wrote: >>> >>> The K3 has the cleanest receive audio I've see thusfar. >>> >> I'm likewise a bit skeptical (but I could be wrong) about the alleged K3 >> rx >> audio issues. My experience is that the K3 rx audio is more >> "transparent" >> and thus any problems with the other guy's audio will be glaringly >> apparent >> with the K3. This might be what some people are hearing - the bad >> signals >> are going to sound "badder" on the K3. The K3 rx is less "forgiving" >> because you are hearing better. I do seem to be noticing how bad most >> signals sound on 20M ssb lately, although there is the occasional smooth >> sounding signal. I routinely A/B with my Orion to confirm what I'm >> hearing. >> >> Perhaps folks who are reporting audio issues with the latest firmware can >> make some WAV recordings that we can listen to, with the "good" and "bad" >> firmware versions. >> >> 73, >> Barry N1EU >> >> -- >> View this message in context: >> http://www.nabble.com/Receiver-distortion-tp17180061p17189855.html >> Sent from the Elecraft mailing list archive at Nabble.com. >> >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> 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: [hidden email] > 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. Version: 8.0.100 / Virus Database: 269.23.16/1428 - Release Date: 5/12/2008 7:44 AM _______________________________________________ Elecraft mailing list Post to: [hidden email] 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: RF gain control calibration
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Administrator
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Steve,
The RF gain control is presently calibrated only for the DSP's internal gain curve. I have a task on my firmware list to calibrate the hardware portion of the curve, which can vary from rig to rig. This will eliminate the problem you mentioned with RF GAIN CCW rotation. 73, Wayne N6KR On May 12, 2008, at 1:28 PM, n4lq wrote: > Rotating my RFG counter clockwise caused the meter to peg at the 3 dot > on the knob scale. Something is wrong there. > > Steve Ellington > [hidden email] ----- http:\\ _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Barry N1EU
G'day,
| n4lq wrote: | > | > The K3 has the cleanest receive audio I've see thusfar. | > | I'm likewise a bit skeptical (but I could be wrong) about the alleged K3 rx | audio issues. My experience is that the K3 rx audio is more "transparent" | and thus any problems with the other guy's audio will be glaringly apparent | with the K3. This might be what some people are hearing - the bad signals | are going to sound "badder" on the K3. The K3 rx is less "forgiving" | because you are hearing better. I do seem to be noticing how bad most | signals sound on 20M ssb lately, although there is the occasional smooth | sounding signal. I routinely A/B with my Orion to confirm what I'm hearing. Certainly even with the K2 and any other receiver it is easy to find some pretty lousy signals. More so during contests. However, to suggest that the K3 is sooooo good that others sound routinely bad is heading towards the "golden eared" audiophile nonsense. Nope, it's not the receiver, it's the 169 strand single crystal oxygen free copper unidirectional leads to your external computer speakers. Now, where did I put that $500 solid silver power lead with the "special edition" gold APP's on. That's just got to improve the TX IMD surely? The reported A/B with the R2C and an unbiased(?) XYL seemed to suggest otherwise. Apologies. More seriously, I've been fiddling with the bandwidth, Lo and Hi cut and audio settings on my K3 and achieved a compromise I like. It has nevertheless made me ponder the whole concept of AD/DA converting a low level signal in a noise background. All AD/DA conversion results in some level of quantisation distortion which might be more noticeable in this circumstance which is routinely encountered in DXing. Mike VP8NO _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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No wonder it sounds poor.... Your using the cheap "junk"!!!
Also the input to the power supply has to be addressed also. I would recommend these: http://www.audioadvisor.com/prodinfo.asp?number=KKPK10PAL Hopefully they will have designed a heavy duty 220 Volt model for when the Elecraft linear becomes available. 73, Bob K2TK Mike Harris wrote: > >Certainly even with the K2 and any other receiver it is easy to find some >pretty lousy signals. More so during contests. However, to suggest that >the K3 is sooooo good that others sound routinely bad is heading towards >the "golden eared" audiophile nonsense. Nope, it's not the receiver, it's >the 169 strand single crystal oxygen free copper unidirectional leads to >your external computer speakers. > >Now, where did I put that $500 solid silver power lead with the "special >edition" gold APP's on. That's just got to improve the TX IMD surely? > >The reported A/B with the R2C and an unbiased(?) XYL seemed to suggest >otherwise. > >Apologies. > >More seriously, I've been fiddling with the bandwidth, Lo and Hi cut and >audio settings on my K3 and achieved a compromise I like. It has >nevertheless made me ponder the whole concept of AD/DA converting a low >level signal in a noise background. All AD/DA conversion results in some >level of quantisation distortion which might be more noticeable in this >circumstance which is routinely encountered in DXing. > >Mike VP8NO > > > > > _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by John Trager
On Mon, 12 May 2008 15:55:47 -0400, N2KBE wrote:
[snip] >BTW, when I rotate the RF GAIN control on my K3 full counter-clockwise, it >doesn't make it up to S9+60db! Anybody else notice this? As a result, a >50mV input will not show S9+60dB. [snip] Mine (#806) makes it to +60dB. Tom, N5GE - SWOT 3537 - Grid EM12jq "Those who would give up Essential Liberty to purchase a little Temporary Safety deserve neither Liberty nor Safety" An excerpt from a letter written in 1755 from the Assembly to the Governor of Pennsylvania. Support the entire Constitution, not just the parts you like. http://www.n5ge.com http://www.eQSL.cc/Member.cfm?N5GE _______________________________________________ Elecraft mailing list Post to: [hidden email] 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
Amateur Radio Operator N5GE
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In reply to this post by Bob-270
I am unworthy.
Regards, Mike VP8NO ----- Original Message ----- From: "Bob" <[hidden email]> To: "Mike Harris" <[hidden email]>; <[hidden email]> Sent: Monday, May 12, 2008 5:44 PM Subject: Re: [Elecraft] receiver distortion | No wonder it sounds poor.... Your using the cheap "junk"!!! | | Also the input to the power supply has to be addressed also. I would | recommend these: | | http://www.audioadvisor.com/prodinfo.asp?number=KKPK10PAL | | Hopefully they will have designed a heavy duty 220 Volt model for when | the Elecraft linear becomes | available. _______________________________________________ Elecraft mailing list Post to: [hidden email] 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: S-meter not getting to S9+60
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Administrator
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In reply to this post by N5GE
The present production firmware (MCU 1.88) will only use the S9+60
segment if "peak-reading S-meter" is enabled (CONFIG:SMTR PK = ON). The next firmware release (a "beta" release, possibly as early as this evening) allows the S9+60 segment to be used even if SMTR PK is set to OFF. 73, Wayne N6KR --- http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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