Crackling in Headphones
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There are times that I have noticed a crackling sound in my headphones
with my K3S. This is not the normal band noise static that has depth, this crackle sound seems very close to my ears. I first noticed it with my Heil headset and I tried wiggling the connection, changing the RX EQ settings and turning on noise reduction but nothing had any effect. It randomly comes and goes and I think I have also heard it on TX. I thought perhaps it was related to the Heil brand headphones. Last night I plugged in a new Sony professional headphone and the crackling sound was very strong for a few minutes and then eventually went away. I have never experience this with any other radio and I have no idea what is causing it or how to make it go away. John KK9A ______________________________________________________________ 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 Message delivered to [hidden email] |
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See if you hear it with no antenna connected (or switch to ANT 2 if
nothing is plugged into it). That will tell you if it is some kind of noise that you are picking up or if it is being produced in the radio. 73, Vic, 4X6GP/K2VCO Rehovot, Israel http://www.qsl.net/k2vco/ On 30 Nov 2015 14:02, [hidden email] wrote: > There are times that I have noticed a crackling sound in my headphones > with my K3S. This is not the normal band noise static that has depth, this > crackle sound seems very close to my ears. I first noticed it with my > Heil headset and I tried wiggling the connection, changing the RX EQ > settings and turning on noise reduction but nothing had any effect. It > randomly comes and goes and I think I have also heard it on TX. I thought > perhaps it was related to the Heil brand headphones. Last night I plugged > in a new Sony professional headphone and the crackling sound was very > strong for a few minutes and then eventually went away. I have never > experience this with any other radio and I have no idea what is causing it > or how to make it go away. > > John KK9A 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 Message delivered to [hidden email] |
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In reply to this post by john@kk9a.com
Could this be the AF limiter kicking in on loud signals? Check the "AF
LIM" menu setting. Steve N9SZ On 30 Nov 2015 14:02, [hidden email] wrote: > There are times that I have noticed a crackling sound in my headphones > with my K3S. This is not the normal band noise static that has depth, this > crackle sound seems very close to my ears. I first noticed it with my > Heil headset and I tried wiggling the connection, changing the RX EQ > settings and turning on noise reduction but nothing had any effect. It > randomly comes and goes and I think I have also heard it on TX. I thought > perhaps it was related to the Heil brand headphones. Last night I plugged > in a new Sony professional headphone and the crackling sound was very > strong for a few minutes and then eventually went away. I have never > experience this with any other radio and I have no idea what is causing it > or how to make it go away. > > John KK9A 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 Message delivered to [hidden email] |
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In reply to this post by john@kk9a.com
I have the same since I sent the rig to Elecraft for factory installation of the new Syn boards and "full tune up". The noise is as you say a crackling popping type noise
No idea Jim W6AIM -------- Original message -------- From: [hidden email] Date: 11/30/2015 4:03 AM (GMT-08:00) To: [hidden email] Subject: [Elecraft] Crackling in Headphones There are times that I have noticeupd a crackling sound in my headphones with my K3S. This is not the normal band noise static that has depth, this crackle sound seems very close to my ears. I first noticed it with my Heil headset and I tried wiggling the connection, changing the RX EQ settings and turning on noise reduction but nothing had any effect. It randomly comes and goes and I think I have also heard it on TX. I thought perhaps it was related to the Heil brand headphones. Last night I plugged in a new Sony professional headphone and the crackling sound was very strong for a few minutes and then eventually went away. I have never experience this with any other radio and I have no idea what is causing it or how to make it go away. John KK9 ______________________________________________________________ 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 Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by Vic Rosenthal
I have done this, and the popping noise remains. It is generated in the radio
Jim W6AIM The Rake -------- Original message -------- From: Vic Rosenthal 4X6GP/K2VCO <[hidden email]> Date: 11/30/2015 4:32 AM (GMT-08:00) To: [hidden email] Subject: Re: [Elecraft] Crackling in Headphones See if you hear it with no antenna connected (or switch to ANT 2 if nothing is plugged into it). That will tell you if it is some kind of noise that you are picking up or if it is being produced in the radio. 73, Vic, 4X6GP/K2VCO Rehovot, Israel http://www.qsl.net/k2vco/ On 30 Nov 2015 14:02, [hidden email] wrote: > There are times that I have noticed a crackling sound in my headphones > with my K3S. This is not the normal band noise static that has depth, this > crackle sound seems very close to my ears. I first noticed it with my > Heil headset and I tried wiggling the connection, changing the RX EQ > settings and turning on noise reduction but nothing had any effect. It > randomly comes and goes and I think I have also heard it on TX. I thought > perhaps it was related to the Heil brand headphones. Last night I plugged > in a new Sony professional headphone and the crackling sound was very > strong for a few minutes and then eventually went away. I have never > experience this with any other radio and I have no idea what is causing it > or how to make it go away. > > John KK9A 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 Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by Steve Zabarnick
Nope, not on mine. It also occurs when the antenna is completely disconnected. I have spent hours troubleshooting this to determine the source of the problem and in my case it is clearly inside the radio. Jim W 6 A I M . -------- Original message -------- From: "zabarnick ." <[hidden email]> Date: 11/30/2015 7:08 AM (GMT-08:00) To: [hidden email] Subject: Re: [Elecraft] Crackling in Headphones Could this be the AF limiter kicking in on loud signals? Check the "AF LIM" menu setting. Steve N9SZ On 30 Nov 2015 14:02, [hidden email] wrote: > There are times that I have noticed a crackling sound in my headphones > with my K3S. This is not the normal band noise static that has depth, this > crackle sound seems very close to my ears. I first noticed it with my > Heil headset and I tried wiggling the connection, changing the RX EQ > settings and turning on noise reduction but nothing had any effect. It > randomly comes and goes and I think I have also heard it on TX. I thought > perhaps it was related to the Heil brand headphones. Last night I plugged > in a new Sony professional headphone and the crackling sound was very > strong for a few minutes and then eventually went away. I have never > experience this with any other radio and I have no idea what is causing it > or how to make it go away. > > John KK9A 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 Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] |
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For us old timers, it sounds like a crackly vacuum tube (not microphonic) but a crackling mixing tube in the eye of chain
I don't recall the exact mixer in the old Drake r4c series, but it was a common occurrence happening about 1 out of 3 times which caused one to have a box of tubes using them to substitute until you could find one that was quiet Rob Sherwood designed a solid state mixer circuit that many Drake users purchased to eliminate this problem Jim W6AIM -------- Original message -------- From: Jim Bolit <[hidden email]> Date: 11/30/2015 7:32 AM (GMT-08:00) To: [hidden email] Subject: [Elecraft] Fwd: Crackling in Headphones Nope, not on mine. It also occurs when the antenna is completely disconnected. I have spent hours troubleshooting this to determine the source of the problem and in my case it is clearly inside the radio. Jim W 6 A I M . -------- Original message -------- From: "zabarnick ." <[hidden email]> Date: 11/30/2015 7:08 AM (GMT-08:00) To: [hidden email] Subject: Re: [Elecraft] Crackling in Headphones Could this be the AF limiter kicking in on loud signals? Check the "AF LIM" menu setting. Steve N9SZ On 30 Nov 2015 14:02, [hidden email] wrote: > There are times that I have noticed a crackling sound in my headphones > with my K3S. This is not the normal band noise static that has depth, this > crackle sound seems very close to my ears. I first noticed it with my > Heil headset and I tried wiggling the connection, changing the RX EQ > settings and turning on noise reduction but nothing had any effect. It > randomly comes and goes and I think I have also heard it on TX. I thought > perhaps it was related to the Heil brand headphones. Last night I plugged > in a new Sony professional headphone and the crackling sound was very > strong for a few minutes and then eventually went away. I have never > experience this with any other radio and I have no idea what is causing it > or how to make it go away. > > John KK9A 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 Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by john@kk9a.com
This occurs with no antenna connected.
John KK9A from: Vic Rosenthal 4X6GP/K2VCO Mon Nov 30 07:31:48 EST 2015 Previous message (by thread): [Elecraft] Crackling in Headphones See if you hear it with no antenna connected (or switch to ANT 2 if nothing is plugged into it). That will tell you if it is some kind of noise that you are picking up or if it is being produced in the radio. 73, Vic, 4X6GP/K2VCO Rehovot, Israel http://www.qsl.net/k2vco/ On Mon, November 30, 2015 7:02 am, [hidden email] wrote: > There are times that I have noticed a crackling sound in my headphones > with my K3S. This is not the normal band noise static that has depth, this > crackle sound seems very close to my ears. I first noticed it with my > Heil headset and I tried wiggling the connection, changing the RX EQ > settings and turning on noise reduction but nothing had any effect. It > randomly comes and goes and I think I have also heard it on TX. I thought > perhaps it was related to the Heil brand headphones. Last night I > plugged in a new Sony professional headphone and the crackling sound was > very strong for a few minutes and then eventually went away. I have never > experience this with any other radio and I have no idea what is causing > it or how to make it go away. > > John KK9A > > ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by john@kk9a.com
My AGC is on fast and I have also heard it while transmitting. The
crackling I hear sounds exactly like a bad connection and not received noise. Wiggling the plug does not have any effect. It is very intermittent and seems to go away the longer the radio is on. I received several direct emails after my post from other people with this problem. So far I have heard no solutions. John KK9A Don Wilhelm w3fpr Tue Dec 1 09:30:07 EST 2015 Previous message (by thread): [Elecraft] [Bulk] Re Elecraft] Crackling in Headphones For those with 'Crackling in Headphones', I have to ask if you are running with AGC off? If so, the limiter can be kicking in and cause such crackling. Better than running with AGC off, just leave the AGC on and if you reduce the RF gain to counter strong signals, the AGC action will be reduced. I know old habits die hard, but the K3 is not the same as my old NC-100 receiver and needs to be operated differently. 73, Don W3FPR ______________________________________________________________ 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 Message delivered to [hidden email] |
Re: Crackling in Headphones
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Has anyone contacted Elecraft support? This one seems to sorta fall into the same category as the harsh/noisy receiver issue a few years back. AFAIR, that one never was solved officially.
73, Mike NF4L > On Dec 1, 2015, at 9:44 AM, [hidden email] wrote: > > My AGC is on fast and I have also heard it while transmitting. The > crackling I hear sounds exactly like a bad connection and not received > noise. Wiggling the plug does not have any effect. It is very intermittent > and seems to go away the longer the radio is on. I received several direct > emails after my post from other people with this problem. So far I have > heard no solutions. > > John KK9A > > > Don Wilhelm w3fpr > Tue Dec 1 09:30:07 EST 2015 > Previous message (by thread): [Elecraft] [Bulk] Re Elecraft] Crackling in > Headphones > > For those with 'Crackling in Headphones', I have to ask if you are > running with AGC off? If so, the limiter can be kicking in and cause > such crackling. > Better than running with AGC off, just leave the AGC on and if you > reduce the RF gain to counter strong signals, the AGC action will be > reduced. > I know old habits die hard, but the K3 is not the same as my old NC-100 > receiver and needs to be operated differently. > > 73, > Don W3FPR > > ______________________________________________________________ > 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 > Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] |
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Please clarify for me: Does this issue only effect the new synth and/or
the K3S. It does not effect a straight unmodified K3? Bill W2BLC K-Line ______________________________________________________________ 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 Message delivered to [hidden email] |
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FYI... I got one of the earliest of the new synth boards... over many hours
of use I have NEVER experienced any such noise. I have no experience with the K3S. Dave - K9FN On Dec 1, 2015 9:09 AM, "Bill" <[hidden email]> wrote: > Please clarify for me: Does this issue only effect the new synth and/or > the K3S. It does not effect a straight unmodified K3? > > Bill W2BLC K-Line > > ______________________________________________________________ > 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 > Message delivered to [hidden email] > 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 Message delivered to [hidden email] |
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FWIW I noticed a similar crackling in my previous Heil headset and it turned out to be my cell phone was placed too close to the headset cord. I was picking up the cell phone transmission in the headset. Long shot, but thought I'd mention.
73, David > On Dec 1, 2015, at 7:13 AM, David Bunte <[hidden email]> wrote: > > FYI... I got one of the earliest of the new synth boards... over many hours > of use I have NEVER experienced any such noise. I have no experience with > the K3S. > > Dave - K9FN >> On Dec 1, 2015 9:09 AM, "Bill" <[hidden email]> wrote: >> >> Please clarify for me: Does this issue only effect the new synth and/or >> the K3S. It does not effect a straight unmodified K3? >> >> Bill W2BLC K-Line >> >> ______________________________________________________________ >> 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 >> Message delivered to [hidden email] > ______________________________________________________________ > 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 > Message delivered to [hidden email] 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 Message delivered to [hidden email] |
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In reply to this post by john@kk9a.com
I did not calibrate my K3s smeter on initial assembly, nor have I done it
since, so the following is as per factory setup with no atten or preamp, AGC-F, RFgain Max. The radio has KFL3B-FM, KFL3A-6K, KFL3A-2.8K, KFL3A-400, and KBPF3A installed. Injection of a 50uV signal (50 ohms) (-73dBm) at 7.05 MHz produces an S9 reading and the P3 indicates about -76 dBm. It falls to about S8 with 50 Hz bandwidth setting. (I have not performed any filter calibration) Injection of a 50uV signal at 1.4 MHz produces an S8 reading and the P3 indicates about -83 dBm.. A local broadcast station on 1450 kHz produces -10dBm into 50 ohms from my antenna, as measured with a calibrated Anritsu MS2034A spectrum analyzer. Applying this signal to the K3s thru an attenuator indicates the signal is about 70 dB over S9. Removing all attenuation results in good audio but with some crackling. The carrier display on the P3 is not stable under these conditions. Tuning down to 640 KHz KFI produces a -20dBm signal into the K3. Listening to KFI under these conditions produces clicks at times but the audio is generally very good. This may not be anything to do with crackling noticed by others but better documents the problem I had. 73 Brian KF6C. ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by Bill-3
I don't know about the 'only' part of your question as I have a late K3 with
the upgrade synthesizers; my headphones are CM 500's and I only operate CW. I have never heard any crackling or popping in my headphones either during contest or rag chewing, 80m through 10m. My AGC is always set to 'fast' and to Don's parameters. I do not recall hearing said 'crackling' with the original synthesizers installed. 73, Tom - W4BQF -----Original Message----- From: Elecraft [mailto:[hidden email]] On Behalf Of Bill Sent: Tuesday, December 1, 2015 10:08 AM To: [hidden email] Subject: Re: [Elecraft] Crackling in Headphones Please clarify for me: Does this issue only effect the new synth and/or the K3S. It does not effect a straight unmodified K3? Bill W2BLC K-Line ______________________________________________________________ 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 Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by Bill-3
I did not have the issue with a stock K3.
I sent my k3 into Elecraft for the Syn upgrade. Elecraft perform the upgrades and the receiver now has his crackling noise. I do not know if the noise exists on the sub receiver as I have not listened to the sub during the crackling noise. Jim W6AIM . -------- Original message -------- From: Bill <[hidden email]> Date: 12/1/2015 7:09 AM (GMT-08:00) To: [hidden email] Subject: Re: [Elecraft] Crackling in Headphones Please clarify for me: Does this issue only effect the new synth and/or the K3S. It does not effect a straight unmodified K3? Bill W2BLC K-Line ______________________________________________________________ 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 Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] |
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