Re: [Elecraft] K3 background hiss in headphones
I suggest adding a second resistor, across the headphones' cord, forming a pad instead of just a series resistor. Approximately 50 ohms shunt will restore damping effect to the headphones' response. This is good practice. 73,Roy K6XKIowa __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - background hiss (noisy K3) - update
One spec pertaining to headphones, and one not realized in terms of the importance, is sensitivity. The more sensitive the headphones means it takes less audio power to produce acoustic energy. If a given signal say a value of -25 dBv is applied, this signal may be heard with some headphones and may not be heard with others. Now, adding a series resistor in effect reduces the apparent sensitivity. In fact, it reduces the available power to the headphones. In the case of the -25 dBv signal, adding a resistor may reduce this value to -35 dBv, or below the sensitivity threshold of the headphones. All of this has little to nothing to do with the impedance of the headphones. In most instances, everyone's hearing decreases with age. Other factors that affect a diminished hearing is prolong exposure to noise or any loud sounds. A combination of sound level and time exposed are key elements to diminished hearing. Repeated exposure over a long period or repetitive cycles will lead to permanent hearing loss. And in many cases this loss is so gradual over a period of years it is not realized or acknowledged to exist. From my experience, the audiologist, after a hearing test said my hearing was normal. Now what he didn't say was "my hearing was normal for a male of my age".My wife complains that I don't listen to her. At least that's what I think she said. 73 Bob, K4TAX On 9/30/2015 7:57 AM, Sullivan, Mike C wrote: Not sure this helps much other than knowing you are not alone. I have had the same problem and fixed it exactly as John - VK7JB has - SN on my K3 is in the 800s. I have checked my S/N ratio and it is at least as good as the spec. My hearing has been checked here at work and I have been told that I have good hearing for anyone these days, and really good for an OF. I would bet having a pair of good ear-plugs in my pocket from the age of 18 or so had a lot to do with it. Just tripped 60 yesterday. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 - background hiss (noisy K3) - update
Not sure this helps much other than knowing you are not alone. I have had the same problem and fixed it exactly as John - VK7JB has - SN on my K3 is in the 800s. I have checked my S/N ratio and it is at least as good as the spec. My hearing has been checked here at work and I have been told that I have good hearing for anyone these days, and really good for an OF. I would bet having a pair of good ear-plugs in my pocket from the age of 18 or so had a lot to do with it. Just tripped 60 yesterday. Mike Sullivan Lockheed Martin, Denver 73 WM0CW .. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - background hiss (noisy K3) - update
Hallo John, tnx for proposal, a will try with some attenuation. Gary AB7MY from Elecraft have helped me with some interesting proposals too. I completely agree with you, unfortunately mein KX3 showes the same behewior (hiss when RF put on zero), but in contrary to my K3, this hiss disappeared when RF is more than 0, so for normal work with KX3 this hiss has no meaning. tnx for all responses 73, Bozidar, S50BN -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-background-hiss-noisy-K3-update-tp7608490p7608532.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - background hiss (noisy K3) - update
An attenuator in the phones lead might be what you need. Some are available from various audio outlets (I have an old Radio Shack - rip - one here). Turn up the attenuation until there's no background audible and you are all set. If you are handy with a soldering iron, a resistor in series with each side of your phones will do the trick. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of bozidar Sent: Tuesday, September 29, 2015 9:53 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 - background hiss (noisy K3) - update Hi, i have studied all the posts about this topic. Seems, that is still, huge confusion about that, so i will try to formulate a problem on simply way: *With low impedance earphones plugged into the audio jack on the K3, you can hear a really annoying noise (hiss) even with the AF and RF volume set to zero(CCW). This audio hiss has a constant level, is added to the audible RF noise and can prevent one from hearing weak signals on an otherwise quiet band.* That hiss has nothing to do with K3 receiver or settings - simply is permanent present. This indicate that something must be wrong with earphones amplifier LM4811MM, and that is odd, because LM4811MM seems to be an high quality chip, designed exactly to work with low impedance earphones , with a minimal amount of external components? My question is: is, in the mean time, known any hardware (or anything else) modification for that issue? best regards, Bozidar -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-background-hiss-noisy-K3-update-tp76 08490.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to r...@cobi.biz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - background hiss (noisy K3) - update
Hello Bozidar, I have K3 #5102 and also well preserved high frequency hearing. I've had the same hiss on my K3 audio since it arrived from the factory. I've used a wide range of headphones, expensive and cheap, and it's present with them all. I discovered that the fix is to introduce some resistance into the audio line and I use a very small, outboard, stereo headphone volume control to do this. I bought several for a few dollars on eBay. I just dial in a very small amount of resistance(I've never actually measured how much) and the hiss is completely gone, with only a very small effect on the K3 audio volume which can be easily compensated for by a tiny increase in the AF gain control if you need to. I have the same hiss on my KX3 audio, which I manage in the same way. FWIW, I have no hiss at all using the same headphones on my little KX1. Hope that helps, 73, John VK7JB -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-background-hiss-noisy-K3-update-tp7608490p7608510.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - background hiss (noisy K3) - update
Hi Dale, tnx for interesting info - i have done this test and ranges on AF and RF knobs are 2-240, so no problem with that. Yes it is an early K3, S/N 28xx. I use Sennheiser CX 300-II ear-canal phones impedance 16 Ohm - maybe is this impedance too low, but accordingly to the data-sheet for LM4811 that should not be the problem. I simply dont know what that could be? 73, Bozidar, S50BN -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-background-hiss-noisy-K3-update-tp7608490p7608506.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - background hiss (noisy K3) - update
Hello Bozidar, I suspect that the issue may be particular to your particular K3. You did not mention the S/N range of your radio, and I may be incorrect about this but I think that very early K3's had an issue similar to this, that was quickly resolved. The S/N of my K3 is in the 58XX range, and I have never heard any of the hiss that you describe. I have a pair of Grado SR225e headphones that have an impedance of 32 ohms, and are very sensitive. I plugged them into the Phones jack on the front of the K3, and with the AF gain control turned fully CCW, there is no hiss or for that matter any sound at all. It's possible that there is an issue with your AF Gain control/encoder. You might want to use the built-in test that allows you to check the encoder steps of the two AF gain and two RF gain controls that is available from the CONFIG > SW TEST menu on the radio. This requires that you first make sure that "Tech Mode" is enabled. To do so, go to CONFIG > TECH MD and then turn your VFO-A dial so that "On" shows above TECH MD on your K3. Then, rotate your VFO-B dial to navigate over to the "SW TEST" menu option. Then slowly rotate your AF Gain control on the K3. You should see the encoder steps (visible on your K3 display) increasing in number as you rotate it clockwise, and decreasing in number as you rotate it CCW. In my case, rotating the AF Gain control fully CCW shows a step of 2. If your value is higher than that at fully CCW, perhaps your AF Gain encoder has a problem. 73, Dale, WA8SRA > Hi, > i have studied all the posts about this topic. > Seems, that is still, huge confusion about that, so i will try to > formulate > a problem on simply way: > > *With low impedance earphones plugged into the audio jack on the K3, you > can > hear a really annoying noise (hiss) even with the AF and RF volume set to > zero(CCW). This audio hiss has a constant level, is added to the audible > RF > noise and can prevent one from hearing weak signals on an otherwise quiet > band.* > > That hiss has nothing to do with K3 receiver or settings - simply is > permanent present. > This indicate that something must be wrong with earphones amplifier > LM4811MM, and that is > odd, because LM4811MM seems to be an high quality chip, designed exactly > to > work with low impedance earphones , with a minimal amount of external > components? > My question is: > is, in the mean time, known any hardware (or anything else) modification > for > that issue? > > best regards, > Bozidar > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - background hiss (noisy K3) - update
I do not notice any hiss with K3 with any headphones. I noticed hiss with other radios. Ignacy, NO9E -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-background-hiss-noisy-K3-update-tp7608490p7608498.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 - background hiss (noisy K3) - update
Hi, i have studied all the posts about this topic. Seems, that is still, huge confusion about that, so i will try to formulate a problem on simply way: *With low impedance earphones plugged into the audio jack on the K3, you can hear a really annoying noise (hiss) even with the AF and RF volume set to zero(CCW). This audio hiss has a constant level, is added to the audible RF noise and can prevent one from hearing weak signals on an otherwise quiet band.* That hiss has nothing to do with K3 receiver or settings - simply is permanent present. This indicate that something must be wrong with earphones amplifier LM4811MM, and that is odd, because LM4811MM seems to be an high quality chip, designed exactly to work with low impedance earphones , with a minimal amount of external components? My question is: is, in the mean time, known any hardware (or anything else) modification for that issue? best regards, Bozidar -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-background-hiss-noisy-K3-update-tp7608490.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - background hiss
Yup. Great big clue there :>) 73, Guy. On Sun, Apr 29, 2012 at 1:19 PM, John Chappell G3XRJ wrote: > My receiver is fabulously quiet with the AGC off. > > 73 John G3XRJ > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
While tweaking the rx EQ may help mask the problem I feel the root cause is that the AGC operates at too low a signal level. I like to set my RF gain at a level where I can hear what I want but not the band noise. If I then engage the AGC it has the effect of increasing the gain by 2 or three S points increasing background band noise by the same amount. Or put another way, the same as increasing the RF gain control by 15 - 20 degrees of arc. It is not receiver generated noise. My receiver is fabulously quiet with the AGC off. 73 John G3XRJ > > My first thought was to change the EQ more like I have my TX eq set pulling > the low end down and raising the high end up does tend to accent the > high-end of speech for clarity on phone but on a quiet band makes the band > noise sound hissy. > > I don't have my low end set up to the plus side as high nor the high end set > as low on the negative side as N1EU but have went in this general direction > to smooth out the band noise but in a very active round table I don't know > if the noise tone is really that important in relation to good receive audio > clarity. If you go too high on the plus side of the bottom end and too > negative on the high end you can tend to use loose some signal clarity and > get a little muddy. > > > > 73 de KE4WY Jim > > These work for me, CW or Phone: > > RX Eq settings Low to High audio band: > 50 = +2 > 100= +2 > 200= +1 > 400= 0 > 800=-1 > 1.6k= -2 > 2.4k= -3 > 3.2k= -4 > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 - background hiss
My first thought was to change the EQ more like I have my TX eq set pulling the low end down and raising the high end up does tend to accent the high-end of speech for clarity on phone but on a quiet band makes the band noise sound hissy. I don't have my low end set up to the plus side as high nor the high end set as low on the negative side as N1EU but have went in this general direction to smooth out the band noise but in a very active round table I don't know if the noise tone is really that important in relation to good receive audio clarity. If you go too high on the plus side of the bottom end and too negative on the high end you can tend to use loose some signal clarity and get a little muddy. 73 de KE4WY Jim These work for me, CW or Phone: RX Eq settings Low to High audio band: 50 = +2 100= +2 200= +1 400= 0 800=-1 1.6k= -2 2.4k= -3 3.2k= -4 -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Adrian Sent: Saturday, April 28, 2012 8:06 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 - background hiss You guys are on the wrong track, NR is a waste of time on the K3 on SSB, esp low bands and attenuation ATT and/or RF gain reduction is way better to keep audio clarity whilst making noise transparent. Recommend; AGC threshold = 8 AGC slope = 0. This white noise issue is fixed with N1EU pink noise roll-off settings; RX Eq settings Low to High audio band:50 = +9 100= +5 200= +2 400=0 800=-2 1.6k=-3 2.4k=-5 3.2k=-10 Problem solved . Adrian ... vk4tux __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
Bob, Guy is giving you a lot of good advice, and he has some serious operating skills behind him, so he knows what he is saying. Maybe you can think of it this way -- "You can't copy (with your ears) signals that are buried in the atmospheric noise, so why make that noise louder". 73, Don W3FPR Yes Guy's information to deal with noise is exactly how I run here, however the white noise issue is best fixed with the RX equaliser settings I gave earlier. If you did manage to read my post Bob and try those settings, then you will be pleasantly surprised and satisfied with the new mellow sound of your K3. Please note that this is reversible in case you think vk advice is worth little. Adrian ... vk4tux __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 - background hiss
I use a Datong FL3 audio filter and the difference to my ears is amazing. The K3 sounds a lot lesser hissy and is very "warm" sounding when compared to the unfiltered radio. Yes, I have tried all AGC and EQ settings.The difference can not be equaled by just adjusting the RX EQ or by using a pink noise roll off mask. My Datong FL3 is hooked up permanently to the K3 and I can easily switch it in and out. Anecdotal comments from other hams also confirms the filters efficacy. I have the DSP board upgrade in the K3. I have perfect hearing, so its not my ears coloring the results. The K3's hiss does have a sharp bite to it that was fixed by using the Datong filter. I know what real hiss is, having owned a TS530S and a FT990 both of which had the worst imaginable IF hiss. When I tried these radio again I could not believe how quiet the K3 really is however you then use a SDR radio and your perspective of what quiet is changes! Maybe the K2 SCAF or some other SCAF will do the same job as the Datong. Datongs audio filter has a legendary reputation and its audio peak filter on CW and general filtering qualities leave many DSP radios for dead. Amazing for a 30 year old box! If you can find a Datong FL3 buy it! 73 Craig __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
*Adrian, My experience with those settings are the same as yours. Works for me. 73's Gary * On 29 April 2012 10:06, Adrian wrote: > You guys are on the wrong track, NR is a waste of time on the K3 on SSB, > esp > low bands and attenuation ATT and/or RF gain reduction is way better to > keep > audio clarity whilst making noise transparent. Recommend; AGC threshold = 8 > AGC slope = 0. > > This white noise issue is fixed with N1EU pink noise roll-off settings; > > RX Eq settings Low to High audio band:50 = +9 100= +5 200= +2 400=0 > 800=-2 1.6k=-3 2.4k=-5 3.2k=-10 > > Problem solved . > > Adrian ... vk4tux > > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Gary VK4FD - Motorhome Mobile Elecraft Equipment K3 #679, KPA-500 #018 Living the dream!!! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
Bob, Guy is giving you a lot of good advice, and he has some serious operating skills behind him, so he knows what he is saying. Maybe you can think of it this way -- "You can't copy (with your ears) signals that are buried in the atmospheric noise, so why make that noise louder". 73, Don W3FPR On 4/28/2012 8:20 PM, Bob K6UJ wrote: > Guy, > Thanks for the info. > I think I have "afraid I wont be able to copy weak signal" fobia, hihi. > I need to experiment more with the RF gain and PRE and convince myself that > that I am not sacrificing weak sig copy. > My problem lies in the space between the headphones, hihihihi > > Bob > K6UJ > > > > On Apr 28, 2012, at 4:58 PM, Guy Olinger K2AV wrote: > >> You only need set PRE/none/ATT and RF gain correctly. Many people seem to >> thing that RF gain at max all the time and PRE on all the time, for all >> bands all the time, is the normal setting. >> >> You can make this exact same error on a Ten-Tec Orion. PRE/ATT/RF gain need >> to be set for ambient noise with NO signal to be at a very moderate level. >> It is not at all uncommon on 160 and 80 for that to be ATT on and RF gain at >> two PM. My Yaesu MP dealt with that issue by deliberately making 160/80 >> insensitive so they would not receive reports of a noisy receiver. >> >> On your K3 you have the flexibility to use those on the low bands to supply >> preamplier gain for low output directional RX antennas. >> >> My TX antenna on 160 is ATT on, RF gain at noon, and phased loops-on-ground >> to NE on the second RX set to PRE on and RF gain at max. Works balanced and >> gang-busters on diversity, because the flexibility in the K3 allows me to >> equalize the noise levels in the antennas. There is no roaring noise coming >> out of the RX and NR does not really help for really weak CW signals. >> Narrow selectivity does better. >> >> 73, Guy. >> >> On Sat, Apr 28, 2012 at 6:42 PM, Bob K6UJ wrote: >> I have a Kenwood TS-590S for a back up to my K3 and it has a noticeably >> quieter background than the K3. >> I believe we should be able to address this with the NR in the K3, I'm >> still learning how to adjust the NR. >> >> >> Bob >> K6UJ >> >> >> >> On Apr 28, 2012, at 12:15 PM, hawley, charles j jr wrote: >> >>> I remember that my Kenwood 850 was quiet like that compared to my Yeasu >>> 990. Possibly how the agc is handled by Kenwood? >>> >>> Sent from my iPad >>> >>> On Apr 28, 2012, at 8:07 AM, "Bill" wrote: >>> I have had my K3 for a couple of months - so I am still learning. At this point, my primary concern is the amount of background hiss that I have when no signals are being received. For example: When on 75 this AM I am listening to a local net. When no one is talking the background hiss rises. When I switch to my TS-480, signals are just as strong and everything is the same - EXCEPT there is nearly zero background hiss. I use the ATT on both rigs. I much prefer the near FM silence of the 480. I have already reduced it somewhat by use of the RX Equalizer. However, it needs a lot more reduction to get to what I feel is an acceptable level. Of note: I live in a rural area that has no background noise - daytime level on 75 meters is zero. Suggestions would be most appreciated. Bill W2BLC -- IN GOD I TRUST (but, NOT a single politician) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net 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:Elecraft@mailman.qth.net >>> >>> 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:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net > > 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: ht
Re: [Elecraft] K3 - background hiss
Guy, Thanks for the info. I think I have "afraid I wont be able to copy weak signal" fobia, hihi. I need to experiment more with the RF gain and PRE and convince myself that that I am not sacrificing weak sig copy. My problem lies in the space between the headphones, hihihihi Bob K6UJ On Apr 28, 2012, at 4:58 PM, Guy Olinger K2AV wrote: > You only need set PRE/none/ATT and RF gain correctly. Many people seem to > thing that RF gain at max all the time and PRE on all the time, for all bands > all the time, is the normal setting. > > You can make this exact same error on a Ten-Tec Orion. PRE/ATT/RF gain need > to be set for ambient noise with NO signal to be at a very moderate level. > It is not at all uncommon on 160 and 80 for that to be ATT on and RF gain at > two PM. My Yaesu MP dealt with that issue by deliberately making 160/80 > insensitive so they would not receive reports of a noisy receiver. > > On your K3 you have the flexibility to use those on the low bands to supply > preamplier gain for low output directional RX antennas. > > My TX antenna on 160 is ATT on, RF gain at noon, and phased loops-on-ground > to NE on the second RX set to PRE on and RF gain at max. Works balanced and > gang-busters on diversity, because the flexibility in the K3 allows me to > equalize the noise levels in the antennas. There is no roaring noise coming > out of the RX and NR does not really help for really weak CW signals. Narrow > selectivity does better. > > 73, Guy. > > On Sat, Apr 28, 2012 at 6:42 PM, Bob K6UJ wrote: > I have a Kenwood TS-590S for a back up to my K3 and it has a noticeably > quieter background than the K3. > I believe we should be able to address this with the NR in the K3, I'm still > learning how to adjust the NR. > > > Bob > K6UJ > > > > On Apr 28, 2012, at 12:15 PM, hawley, charles j jr wrote: > > > I remember that my Kenwood 850 was quiet like that compared to my Yeasu > > 990. Possibly how the agc is handled by Kenwood? > > > > Sent from my iPad > > > > On Apr 28, 2012, at 8:07 AM, "Bill" wrote: > > > >> I have had my K3 for a couple of months - so I am still learning. > >> > >> At this point, my primary concern is the amount of background hiss that > >> I have when no signals are being received. For example: When on 75 this > >> AM I am listening to a local net. When no one is talking the background > >> hiss rises. > >> > >> When I switch to my TS-480, signals are just as strong and everything is > >> the same - EXCEPT there is nearly zero background hiss. I use the ATT on > >> both rigs. I much prefer the near FM silence of the 480. > >> > >> I have already reduced it somewhat by use of the RX Equalizer. However, > >> it needs a lot more reduction to get to what I feel is an acceptable > >> level. Of note: I live in a rural area that has no background noise - > >> daytime level on 75 meters is zero. > >> > >> Suggestions would be most appreciated. > >> > >> Bill W2BLC > >> > >> -- > >> IN GOD I TRUST (but, NOT a single politician) > >> __ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> 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:Elecraft@mailman.qth.net > > > > 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
Bob, I would discourage you from using the preamp except on the higher bands where the atmospheric noise is lower. I would also discourage you from using NR for that purpose. The K3 is a contest/DX class transceiver, and like a fine race car, does need to have a little more than casual "all knobs to the right" operation. If you reduce the RF gain, the S-meter will no longer be calibrated. You can make the S-meter response independent of the RF Gain by setting the Config menu to SMTR MD to ABS. 73, Don W3FPR On 4/28/2012 7:35 PM, Bob K6UJ wrote: > Don, > I usually leave the preamp on and not really needed as you said. I will try > backing down the RF gain > a tad also. Thanks for the info. > I found too, unless I have other noise issues to deal with, setting the NR at > F1-1 > reduces the hiss quite a bit, and no impact at all on the sig. Just seems to > give a quieter background, very nice. > > Bob > K6UJ > > > On Apr 28, 2012, at 4:01 PM, Don Wilhelm wrote: > >> Bob, >> >> The K3 has more reserve gain than most other receivers, and the lack of >> signals cause the AGC to set the receiver top full gain. >> >> With other receivers, I usually can run the preamp to advantage, but with my >> K3 it is fine without the preamp on. >> >> Do you have the preamp on? If not, perhaps you want to turn on the >> attenuator. To tell if you have enough gain, disconnect the antenna and >> then reconnect it. If the receiver can hear the "antenna noise" you can >> reduce the gain even further - perhaps by reducing the RF Gain. >> >> 73, >> Don W3FPR >> >> On 4/28/2012 6:42 PM, Bob K6UJ wrote: >>> I have a Kenwood TS-590S for a back up to my K3 and it has a noticeably >>> quieter background than the K3. >>> I believe we should be able to address this with the NR in the K3, I'm >>> still learning how to adjust the NR. >>> >>> >>> Bob >>> K6UJ >>> >>> >>> >>> On Apr 28, 2012, at 12:15 PM, hawley, charles j jr wrote: >>> I remember that my Kenwood 850 was quiet like that compared to my Yeasu 990. Possibly how the agc is handled by Kenwood? Sent from my iPad On Apr 28, 2012, at 8:07 AM, "Bill" wrote: > I have had my K3 for a couple of months - so I am still learning. > > At this point, my primary concern is the amount of background hiss that > I have when no signals are being received. For example: When on 75 this > AM I am listening to a local net. When no one is talking the background > hiss rises. > > When I switch to my TS-480, signals are just as strong and everything is > the same - EXCEPT there is nearly zero background hiss. I use the ATT on > both rigs. I much prefer the near FM silence of the 480. > > I have already reduced it somewhat by use of the RX Equalizer. However, > it needs a lot more reduction to get to what I feel is an acceptable > level. Of note: I live in a rural area that has no background noise - > daytime level on 75 meters is zero. > > Suggestions would be most appreciated. > > Bill W2BLC > > -- > IN GOD I TRUST (but, NOT a single politician) > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net 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:Elecraft@mailman.qth.net >>> >>> 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
You guys are on the wrong track, NR is a waste of time on the K3 on SSB, esp low bands and attenuation ATT and/or RF gain reduction is way better to keep audio clarity whilst making noise transparent. Recommend; AGC threshold = 8 AGC slope = 0. This white noise issue is fixed with N1EU pink noise roll-off settings; RX Eq settings Low to High audio band:50 = +9 100= +5 200= +2 400=0 800=-2 1.6k=-3 2.4k=-5 3.2k=-10 Problem solved . Adrian ... vk4tux __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
CW or SSB or both? How old is the K3? There was a DSP swapout that addressed this. For SSB I drop the FC on the filter down to about 1.0 which helps. There were some other settings that might help. Check the archives. Mike W0MU W0MU-1 CC Cluster w0mu.net On 4/28/2012 5:35 PM, Bob K6UJ wrote: > Don, > I usually leave the preamp on and not really needed as you said. I will try > backing down the RF gain > a tad also. Thanks for the info. > I found too, unless I have other noise issues to deal with, setting the NR at > F1-1 > reduces the hiss quite a bit, and no impact at all on the sig. Just seems to > give a quieter background, very nice. > > Bob > K6UJ > > > On Apr 28, 2012, at 4:01 PM, Don Wilhelm wrote: > >> Bob, >> >> The K3 has more reserve gain than most other receivers, and the lack of >> signals cause the AGC to set the receiver top full gain. >> >> With other receivers, I usually can run the preamp to advantage, but with my >> K3 it is fine without the preamp on. >> >> Do you have the preamp on? If not, perhaps you want to turn on the >> attenuator. To tell if you have enough gain, disconnect the antenna and >> then reconnect it. If the receiver can hear the "antenna noise" you can >> reduce the gain even further - perhaps by reducing the RF Gain. >> >> 73, >> Don W3FPR >> >> On 4/28/2012 6:42 PM, Bob K6UJ wrote: >>> I have a Kenwood TS-590S for a back up to my K3 and it has a noticeably >>> quieter background than the K3. >>> I believe we should be able to address this with the NR in the K3, I'm >>> still learning how to adjust the NR. >>> >>> >>> Bob >>> K6UJ >>> >>> >>> >>> On Apr 28, 2012, at 12:15 PM, hawley, charles j jr wrote: >>> I remember that my Kenwood 850 was quiet like that compared to my Yeasu 990. Possibly how the agc is handled by Kenwood? Sent from my iPad On Apr 28, 2012, at 8:07 AM, "Bill" wrote: > I have had my K3 for a couple of months - so I am still learning. > > At this point, my primary concern is the amount of background hiss that > I have when no signals are being received. For example: When on 75 this > AM I am listening to a local net. When no one is talking the background > hiss rises. > > When I switch to my TS-480, signals are just as strong and everything is > the same - EXCEPT there is nearly zero background hiss. I use the ATT on > both rigs. I much prefer the near FM silence of the 480. > > I have already reduced it somewhat by use of the RX Equalizer. However, > it needs a lot more reduction to get to what I feel is an acceptable > level. Of note: I live in a rural area that has no background noise - > daytime level on 75 meters is zero. > > Suggestions would be most appreciated. > > Bill W2BLC > > -- > IN GOD I TRUST (but, NOT a single politician) > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net 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:Elecraft@mailman.qth.net >>> >>> 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
You only need set PRE/none/ATT and RF gain correctly. Many people seem to thing that RF gain at max all the time and PRE on all the time, for all bands all the time, is the normal setting. You can make this exact same error on a Ten-Tec Orion. PRE/ATT/RF gain need to be set for ambient noise with NO signal to be at a very moderate level. It is not at all uncommon on 160 and 80 for that to be ATT on and RF gain at two PM. My Yaesu MP dealt with that issue by deliberately making 160/80 insensitive so they would not receive reports of a noisy receiver. On your K3 you have the flexibility to use those on the low bands to supply preamplier gain for low output directional RX antennas. My TX antenna on 160 is ATT on, RF gain at noon, and phased loops-on-ground to NE on the second RX set to PRE on and RF gain at max. Works balanced and gang-busters on diversity, because the flexibility in the K3 allows me to equalize the noise levels in the antennas. There is no roaring noise coming out of the RX and NR does not really help for really weak CW signals. Narrow selectivity does better. 73, Guy. On Sat, Apr 28, 2012 at 6:42 PM, Bob K6UJ wrote: > I have a Kenwood TS-590S for a back up to my K3 and it has a noticeably > quieter background than the K3. > I believe we should be able to address this with the NR in the K3, I'm > still learning how to adjust the NR. > > > Bob > K6UJ > > > > On Apr 28, 2012, at 12:15 PM, hawley, charles j jr wrote: > > > I remember that my Kenwood 850 was quiet like that compared to my Yeasu > 990. Possibly how the agc is handled by Kenwood? > > > > Sent from my iPad > > > > On Apr 28, 2012, at 8:07 AM, "Bill" wrote: > > > >> I have had my K3 for a couple of months - so I am still learning. > >> > >> At this point, my primary concern is the amount of background hiss that > >> I have when no signals are being received. For example: When on 75 this > >> AM I am listening to a local net. When no one is talking the background > >> hiss rises. > >> > >> When I switch to my TS-480, signals are just as strong and everything is > >> the same - EXCEPT there is nearly zero background hiss. I use the ATT on > >> both rigs. I much prefer the near FM silence of the 480. > >> > >> I have already reduced it somewhat by use of the RX Equalizer. However, > >> it needs a lot more reduction to get to what I feel is an acceptable > >> level. Of note: I live in a rural area that has no background noise - > >> daytime level on 75 meters is zero. > >> > >> Suggestions would be most appreciated. > >> > >> Bill W2BLC > >> > >> -- > >> IN GOD I TRUST (but, NOT a single politician) > >> __ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> 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:Elecraft@mailman.qth.net > > > > 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
Don, I usually leave the preamp on and not really needed as you said. I will try backing down the RF gain a tad also. Thanks for the info. I found too, unless I have other noise issues to deal with, setting the NR at F1-1 reduces the hiss quite a bit, and no impact at all on the sig. Just seems to give a quieter background, very nice. Bob K6UJ On Apr 28, 2012, at 4:01 PM, Don Wilhelm wrote: > Bob, > > The K3 has more reserve gain than most other receivers, and the lack of > signals cause the AGC to set the receiver top full gain. > > With other receivers, I usually can run the preamp to advantage, but with my > K3 it is fine without the preamp on. > > Do you have the preamp on? If not, perhaps you want to turn on the > attenuator. To tell if you have enough gain, disconnect the antenna and then > reconnect it. If the receiver can hear the "antenna noise" you can reduce > the gain even further - perhaps by reducing the RF Gain. > > 73, > Don W3FPR > > On 4/28/2012 6:42 PM, Bob K6UJ wrote: >> I have a Kenwood TS-590S for a back up to my K3 and it has a noticeably >> quieter background than the K3. >> I believe we should be able to address this with the NR in the K3, I'm >> still learning how to adjust the NR. >> >> >> Bob >> K6UJ >> >> >> >> On Apr 28, 2012, at 12:15 PM, hawley, charles j jr wrote: >> >>> I remember that my Kenwood 850 was quiet like that compared to my Yeasu >>> 990. Possibly how the agc is handled by Kenwood? >>> >>> Sent from my iPad >>> >>> On Apr 28, 2012, at 8:07 AM, "Bill" wrote: >>> I have had my K3 for a couple of months - so I am still learning. At this point, my primary concern is the amount of background hiss that I have when no signals are being received. For example: When on 75 this AM I am listening to a local net. When no one is talking the background hiss rises. When I switch to my TS-480, signals are just as strong and everything is the same - EXCEPT there is nearly zero background hiss. I use the ATT on both rigs. I much prefer the near FM silence of the 480. I have already reduced it somewhat by use of the RX Equalizer. However, it needs a lot more reduction to get to what I feel is an acceptable level. Of note: I live in a rural area that has no background noise - daytime level on 75 meters is zero. Suggestions would be most appreciated. Bill W2BLC -- IN GOD I TRUST (but, NOT a single politician) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net 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:Elecraft@mailman.qth.net >>> >>> 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:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
Bob, The K3 has more reserve gain than most other receivers, and the lack of signals cause the AGC to set the receiver top full gain. With other receivers, I usually can run the preamp to advantage, but with my K3 it is fine without the preamp on. Do you have the preamp on? If not, perhaps you want to turn on the attenuator. To tell if you have enough gain, disconnect the antenna and then reconnect it. If the receiver can hear the "antenna noise" you can reduce the gain even further - perhaps by reducing the RF Gain. 73, Don W3FPR On 4/28/2012 6:42 PM, Bob K6UJ wrote: > I have a Kenwood TS-590S for a back up to my K3 and it has a noticeably > quieter background than the K3. > I believe we should be able to address this with the NR in the K3, I'm still > learning how to adjust the NR. > > > Bob > K6UJ > > > > On Apr 28, 2012, at 12:15 PM, hawley, charles j jr wrote: > >> I remember that my Kenwood 850 was quiet like that compared to my Yeasu 990. >> Possibly how the agc is handled by Kenwood? >> >> Sent from my iPad >> >> On Apr 28, 2012, at 8:07 AM, "Bill" wrote: >> >>> I have had my K3 for a couple of months - so I am still learning. >>> >>> At this point, my primary concern is the amount of background hiss that >>> I have when no signals are being received. For example: When on 75 this >>> AM I am listening to a local net. When no one is talking the background >>> hiss rises. >>> >>> When I switch to my TS-480, signals are just as strong and everything is >>> the same - EXCEPT there is nearly zero background hiss. I use the ATT on >>> both rigs. I much prefer the near FM silence of the 480. >>> >>> I have already reduced it somewhat by use of the RX Equalizer. However, >>> it needs a lot more reduction to get to what I feel is an acceptable >>> level. Of note: I live in a rural area that has no background noise - >>> daytime level on 75 meters is zero. >>> >>> Suggestions would be most appreciated. >>> >>> Bill W2BLC >>> >>> -- >>> IN GOD I TRUST (but, NOT a single politician) >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> 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:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
I have a Kenwood TS-590S for a back up to my K3 and it has a noticeably quieter background than the K3. I believe we should be able to address this with the NR in the K3, I'm still learning how to adjust the NR. Bob K6UJ On Apr 28, 2012, at 12:15 PM, hawley, charles j jr wrote: > I remember that my Kenwood 850 was quiet like that compared to my Yeasu 990. > Possibly how the agc is handled by Kenwood? > > Sent from my iPad > > On Apr 28, 2012, at 8:07 AM, "Bill" wrote: > >> I have had my K3 for a couple of months - so I am still learning. >> >> At this point, my primary concern is the amount of background hiss that >> I have when no signals are being received. For example: When on 75 this >> AM I am listening to a local net. When no one is talking the background >> hiss rises. >> >> When I switch to my TS-480, signals are just as strong and everything is >> the same - EXCEPT there is nearly zero background hiss. I use the ATT on >> both rigs. I much prefer the near FM silence of the 480. >> >> I have already reduced it somewhat by use of the RX Equalizer. However, >> it needs a lot more reduction to get to what I feel is an acceptable >> level. Of note: I live in a rural area that has no background noise - >> daytime level on 75 meters is zero. >> >> Suggestions would be most appreciated. >> >> Bill W2BLC >> >> -- >> IN GOD I TRUST (but, NOT a single politician) >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
I remember that my Kenwood 850 was quiet like that compared to my Yeasu 990. Possibly how the agc is handled by Kenwood? Sent from my iPad On Apr 28, 2012, at 8:07 AM, "Bill" wrote: > I have had my K3 for a couple of months - so I am still learning. > > At this point, my primary concern is the amount of background hiss that > I have when no signals are being received. For example: When on 75 this > AM I am listening to a local net. When no one is talking the background > hiss rises. > > When I switch to my TS-480, signals are just as strong and everything is > the same - EXCEPT there is nearly zero background hiss. I use the ATT on > both rigs. I much prefer the near FM silence of the 480. > > I have already reduced it somewhat by use of the RX Equalizer. However, > it needs a lot more reduction to get to what I feel is an acceptable > level. Of note: I live in a rural area that has no background noise - > daytime level on 75 meters is zero. > > Suggestions would be most appreciated. > > Bill W2BLC > > -- > IN GOD I TRUST (but, NOT a single politician) > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - background hiss
Bill, That is the AGC which makes it sound like that. Look at my webpage article dealing with "Noisy K3" to give you some information about how to adjust the AGC parameters to reduce that effect. 73, Don W3FPR On 4/28/2012 9:00 AM, Bill wrote: > I have had my K3 for a couple of months - so I am still learning. > > At this point, my primary concern is the amount of background hiss that > I have when no signals are being received. For example: When on 75 this > AM I am listening to a local net. When no one is talking the background > hiss rises. > > When I switch to my TS-480, signals are just as strong and everything is > the same - EXCEPT there is nearly zero background hiss. I use the ATT on > both rigs. I much prefer the near FM silence of the 480. > > I have already reduced it somewhat by use of the RX Equalizer. However, > it needs a lot more reduction to get to what I feel is an acceptable > level. Of note: I live in a rural area that has no background noise - > daytime level on 75 meters is zero. > > Suggestions would be most appreciated. > > Bill W2BLC > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 - background hiss
I have had my K3 for a couple of months - so I am still learning. At this point, my primary concern is the amount of background hiss that I have when no signals are being received. For example: When on 75 this AM I am listening to a local net. When no one is talking the background hiss rises. When I switch to my TS-480, signals are just as strong and everything is the same - EXCEPT there is nearly zero background hiss. I use the ATT on both rigs. I much prefer the near FM silence of the 480. I have already reduced it somewhat by use of the RX Equalizer. However, it needs a lot more reduction to get to what I feel is an acceptable level. Of note: I live in a rural area that has no background noise - daytime level on 75 meters is zero. Suggestions would be most appreciated. Bill W2BLC -- IN GOD I TRUST (but, NOT a single politician) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
