Re: [Elecraft] K3 Future Factory Hardware Updates; + New beta f/w release 3.27
I just ordered the K3 VFO TUNING NOISE REDUCTION and I'll do the AUTOMATIC FRONT END PROTECTION (1 wire mod) when I get into the radio. I can't find anything on the 3rd mod mentioned in Eric's announcement on August 25th, IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc). Is there a modification sheet for it somewhere on the site? I will be ordering a P3 down the line and I may as well do other mod now. Thank you, de K2GN/Larry K3 - S/N 3278 __ 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 Future Factory Hardware Updates; + New beta f/w release 3.27
Eric, The low freq response is still there in 3.27 / 2.24. The way I check this is the response of the RX EQ. There's a good response if I change the EQ setting on 100Hz and 200Hz. Love it. 73 Arie PA3A --- It will reappear in a future release. Just not as a bug in another feature ;-) 73, Eric > I figured I'd mention it as we now know its possible and I'm hoping to > get this extended frequency response to continue on "and hopefully > come back"... > __ 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 Future Factory Hardware Updates; + New beta f/w release 3.27
SPICE modeling showed that the higher current was necessary to maintain the same maximum signal handling, but I don't remember doing IMD before/after measurements to verify that. Obviously, Elecraft feel that the device can handle the extra signal without increasing current. Larry N8LP Don Wilhelm-4 wrote: > > Joe, > > Are you making an assumption that the P3 input impedance is 50 ohms? > That may or may not be true. I don't know the design parameters of the > P3, but it certainly occurs to me that it is not necessary to use a 50 > ohm input impedance. > > Yes, SDR-IQ and LP-PAN have the 50 ohm input, so connecting those > devices to the K3 IF Out would cause loss. > > 73, > Don W3FPR > > Joe Subich, W4TV wrote: >> >>> A 50-ohm match is not required in any case. >>> >> >> That’s not exactly true. With devices like LP-Pan or >> SDR-IQ that have 50 Ohm inputs connected to what is a >> high impedance output, the transfer loss (antenna to >> IF) was still in the range of -6dB even with the N8LP >> modification. The rest of the solution was to use a >> Clifton Labs Z-1 buffer amplifier (high impedance >> input) in a unity gain configuration, install a 4:1 or >> 9:1 (step down) transformer, or modify the SDR-IQ for >> a 200 Ohm input. >> >> 73, >> >>... Joe, W4TV >> >> > __ > 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 > > -- View this message in context: http://n2.nabble.com/Re-K3-Future-Factory-Hardware-Updates-New-beta-f-w-release-3-27-tp3512382p3514988.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
Re: [Elecraft] K3 Future Factory Hardware Updates; + New beta f/w release 3.27
Bob, Well said - This is the first time I have felt the NR works satisfactorily on SSB. It actually makes SSB signals appear out of nothingness as one tunes the band. In my tests, I felt that for SSB operation the F1-x and F2-x settings worked best and allowed a weak signal to be picked out of the noise. For me, the F3-x and F4-x settings seemed not to help SSB stations that were down near the noise, but the lighter settings worked great on weak signals. Yes, there is a bit of 'hollowness' to SSB voices, and the effect is magnified with AFX on, but that is not a problem in my opinion. I am running with RX EQ flat. 73, Don W3FPR Bob Garrett wrote: > In my not so humble opinion, version 3.27 works extremely well for both CW > and SSB. I'd suggest before you start drawing conclusions from one posting, > try it yourself and then you can make your own decision as to how affective > or unaffective the newest efforts from our dedicated Elecraft team work for > your particular operating style. > 73, Bob K3UL > > __ 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 Future Factory Hardware Updates; + New beta f/w release 3.27
I'd felt that the SSB NR was a bit lacking in this latest version but found that the echo was very difficult to copy through and when listening to stronger stations however like I said I didn't get a change to spend a lot of time behind it... I just made a contact to Tasmania (he barely heard me but it worked). Anyway I found that using AFX in conjunction with the NR makes the echo quite pronounced. Also when I was testing it before I was testing with a somewhat stronger station and that seemed almost like it was clipping and muffling the station. But when employing the feature with weaker stations it seems to do a bit better job. I'm not so sure I'd try it on the really weak ones. But cranking things down to about 1.6Khz wide with an FC around 1.05 or soish (depending on the op's voice) does a good job of cleaning up some noise... But it sure seems to work a trick in the really aggressive settings for the weak CW stations. Just like any tool it has its places where it does a very good job and it has its places where you're better off without it. I'm still very happy with it as of yet in CW and greatly appreciate all of the hard work that is going into this feature! Glad to know I'm not the only one that never sleeps.. ;) ~Brett On Tue, Aug 25, 2009 at 6:00 PM, Brett Howard wrote: > I've not had a chance to spend a lot of time with the new firmware but > here are my initial impressions. > > The NR seems to be really great in CW (but I liked it a lot in 3.25 as > well). It seems to fade into the new settings a bit quicker and not > need to be turned off and back on again. Although I find myself being > impatient and still doing that at times. I did however go up and try > it out on some SSB stuff and it seems to really round out and muffle > some of the SSB stuff. I found the signals easier to copy with the NR > off than on. However the NR in CW is quite impressive at pulling out > some of the weak ones. Its not doing such a good job that I'd not be > able to make copy with out it but for me who is a bit green on copying > its nice to be able to take many signals and make them sound near > perfect. > > One detriment is that when setting the radio to PB CTRL = 0.1 before > it seemed like there was a lot more low frequency response and that > the bottom two bands in the EQ finally did something for a change. Is > there something that one can do to get that audio back? > > Testing the auto notch in a labratory type environment I inject an S9 > signal and then notch it I get 43dB of attenuation. Inject a 1uV > signal and I get 10dB of attenuation. Both make the signal generator > sound as if its been turned off. > > ~Brett > > On Tue, Aug 25, 2009 at 10:52 AM, Eric Swartz - WA6HHQ, > Elecraft wrote: >> Hi Roy, >> >> As of today, we have made the following enhancements to all K3s leaving >> the factory: >> >> K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) >> K3 AUTOMATIC FRONT END PROTECTION (1 wire mod) >> K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 resistor value >> change) >> >> Based on feedback form those that have tried the preliminary release of >> these changes, we are comfortable with adding them as standard K3 features. >> >> Please note that the last item, the IF Output Buffer Gain mMod, is >> slightly different than the similar N8LP mod some have been performing >> on their K3s independently. We determined that only one value needs to >> change to implement the gain increase for the IF output. We are changing >> R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may >> also leave it as is.) >> >> Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is >> already available on the web page at: >> >> http://www.elecraft.com/K3/k3_software.htm >> >> This release includes: >> >> *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. >> *AUTONOTCH depth improved. >> *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). >> *VFOs NOW TUNE DOWN TO 490 kHz. >> >> We never sleep in Aptos! :-) >> >> 73, Eric WA6HHQ >> >> Roy Morris wrote: >>> I would like to know if is the intention of Elecraft to incorporate the K3 >>> AUTOMATIC FRONT-END PROTECTION mod and the K3VFO TUNING NOISE REDUCTION mod >>> in future PC boards. If so, I plan to install these mods in my K3s. Roy >>> Morris W4WFB >>> >> __ >> 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: ht
Re: [Elecraft] K3 Future Factory Hardware Updates; + New beta f/w release 3.27
In my not so humble opinion, version 3.27 works extremely well for both CW and SSB. I'd suggest before you start drawing conclusions from one posting, try it yourself and then you can make your own decision as to how affective or unaffective the newest efforts from our dedicated Elecraft team work for your particular operating style. 73, Bob K3UL __ 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 Future Factory Hardware Updates; + New beta f/w release 3.27
It will reappear in a future release. Just not as a bug in another feature ;-) 73, Eric Brett Howard wrote: > I figured I'd mention it as we now know its possible and I'm hoping to > get this extended frequency response to continue on "and hopefully come > back"... > > ~Brett > > On Tue, 2009-08-25 at 21:16 -0400, Steve Ellington wrote: >> The low frequency audio is gone now. Yes it was certainly nice while it >> lasted. >> Have to revert to 3.25 if you want LF audio. >> Steve >> N4LQ >> >> _..._ __ 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 Future Factory Hardware Updates; + New beta f/w release 3.27
I figured I'd mention it as we now know its possible and I'm hoping to get this extended frequency response to continue on "and hopefully come back"... ~Brett On Tue, 2009-08-25 at 21:16 -0400, Steve Ellington wrote: > The low frequency audio is gone now. Yes it was certainly nice while it > lasted. > Have to revert to 3.25 if you want LF audio. > Steve > N4LQ > n...@carolina.rr.com > - Original Message - > From: "Brett Howard" > Cc: > Sent: Tuesday, August 25, 2009 9:00 PM > Subject: Re: [Elecraft] K3 Future Factory Hardware Updates;+ New beta f/w > release 3.27 > > > I've not had a chance to spend a lot of time with the new firmware but > here are my initial impressions. > > The NR seems to be really great in CW (but I liked it a lot in 3.25 as > well). It seems to fade into the new settings a bit quicker and not > need to be turned off and back on again. Although I find myself being > impatient and still doing that at times. I did however go up and try > it out on some SSB stuff and it seems to really round out and muffle > some of the SSB stuff. I found the signals easier to copy with the NR > off than on. However the NR in CW is quite impressive at pulling out > some of the weak ones. Its not doing such a good job that I'd not be > able to make copy with out it but for me who is a bit green on copying > its nice to be able to take many signals and make them sound near > perfect. > > One detriment is that when setting the radio to PB CTRL = 0.1 before > it seemed like there was a lot more low frequency response and that > the bottom two bands in the EQ finally did something for a change. Is > there something that one can do to get that audio back? > > Testing the auto notch in a labratory type environment I inject an S9 > signal and then notch it I get 43dB of attenuation. Inject a 1uV > signal and I get 10dB of attenuation. Both make the signal generator > sound as if its been turned off. > > ~Brett > > On Tue, Aug 25, 2009 at 10:52 AM, Eric Swartz - WA6HHQ, > Elecraft wrote: > > Hi Roy, > > > > As of today, we have made the following enhancements to all K3s leaving > > the factory: > > > > K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) > > K3 AUTOMATIC FRONT END PROTECTION (1 wire mod) > > K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 resistor value > > change) > > > > Based on feedback form those that have tried the preliminary release of > > these changes, we are comfortable with adding them as standard K3 > > features. > > > > Please note that the last item, the IF Output Buffer Gain mMod, is > > slightly different than the similar N8LP mod some have been performing > > on their K3s independently. We determined that only one value needs to > > change to implement the gain increase for the IF output. We are changing > > R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may > > also leave it as is.) > > > > Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is > > already available on the web page at: > > > > http://www.elecraft.com/K3/k3_software.htm > > > > This release includes: > > > > *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. > > *AUTONOTCH depth improved. > > *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). > > *VFOs NOW TUNE DOWN TO 490 kHz. > > > > We never sleep in Aptos! :-) > > > > 73, Eric WA6HHQ > > > > Roy Morris wrote: > >> I would like to know if is the intention of Elecraft to incorporate the > >> K3 AUTOMATIC FRONT-END PROTECTION mod and the K3VFO TUNING NOISE > >> REDUCTION mod in future PC boards. If so, I plan to install these mods in > >> my K3s. Roy Morris W4WFB > >> > > __ > > 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 Future Factory Hardware Updates; + New beta f/w release 3.27
The low frequency audio is gone now. Yes it was certainly nice while it lasted. Have to revert to 3.25 if you want LF audio. Steve N4LQ n...@carolina.rr.com - Original Message - From: "Brett Howard" Cc: Sent: Tuesday, August 25, 2009 9:00 PM Subject: Re: [Elecraft] K3 Future Factory Hardware Updates;+ New beta f/w release 3.27 I've not had a chance to spend a lot of time with the new firmware but here are my initial impressions. The NR seems to be really great in CW (but I liked it a lot in 3.25 as well). It seems to fade into the new settings a bit quicker and not need to be turned off and back on again. Although I find myself being impatient and still doing that at times. I did however go up and try it out on some SSB stuff and it seems to really round out and muffle some of the SSB stuff. I found the signals easier to copy with the NR off than on. However the NR in CW is quite impressive at pulling out some of the weak ones. Its not doing such a good job that I'd not be able to make copy with out it but for me who is a bit green on copying its nice to be able to take many signals and make them sound near perfect. One detriment is that when setting the radio to PB CTRL = 0.1 before it seemed like there was a lot more low frequency response and that the bottom two bands in the EQ finally did something for a change. Is there something that one can do to get that audio back? Testing the auto notch in a labratory type environment I inject an S9 signal and then notch it I get 43dB of attenuation. Inject a 1uV signal and I get 10dB of attenuation. Both make the signal generator sound as if its been turned off. ~Brett On Tue, Aug 25, 2009 at 10:52 AM, Eric Swartz - WA6HHQ, Elecraft wrote: > Hi Roy, > > As of today, we have made the following enhancements to all K3s leaving > the factory: > > K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) > K3 AUTOMATIC FRONT END PROTECTION (1 wire mod) > K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 resistor value > change) > > Based on feedback form those that have tried the preliminary release of > these changes, we are comfortable with adding them as standard K3 > features. > > Please note that the last item, the IF Output Buffer Gain mMod, is > slightly different than the similar N8LP mod some have been performing > on their K3s independently. We determined that only one value needs to > change to implement the gain increase for the IF output. We are changing > R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may > also leave it as is.) > > Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is > already available on the web page at: > > http://www.elecraft.com/K3/k3_software.htm > > This release includes: > > *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. > *AUTONOTCH depth improved. > *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). > *VFOs NOW TUNE DOWN TO 490 kHz. > > We never sleep in Aptos! :-) > > 73, Eric WA6HHQ > > Roy Morris wrote: >> I would like to know if is the intention of Elecraft to incorporate the >> K3 AUTOMATIC FRONT-END PROTECTION mod and the K3VFO TUNING NOISE >> REDUCTION mod in future PC boards. If so, I plan to install these mods in >> my K3s. Roy Morris W4WFB >> > __ > 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 Future Factory Hardware Updates; + New beta f/w release 3.27
I've not had a chance to spend a lot of time with the new firmware but here are my initial impressions. The NR seems to be really great in CW (but I liked it a lot in 3.25 as well). It seems to fade into the new settings a bit quicker and not need to be turned off and back on again. Although I find myself being impatient and still doing that at times. I did however go up and try it out on some SSB stuff and it seems to really round out and muffle some of the SSB stuff. I found the signals easier to copy with the NR off than on. However the NR in CW is quite impressive at pulling out some of the weak ones. Its not doing such a good job that I'd not be able to make copy with out it but for me who is a bit green on copying its nice to be able to take many signals and make them sound near perfect. One detriment is that when setting the radio to PB CTRL = 0.1 before it seemed like there was a lot more low frequency response and that the bottom two bands in the EQ finally did something for a change. Is there something that one can do to get that audio back? Testing the auto notch in a labratory type environment I inject an S9 signal and then notch it I get 43dB of attenuation. Inject a 1uV signal and I get 10dB of attenuation. Both make the signal generator sound as if its been turned off. ~Brett On Tue, Aug 25, 2009 at 10:52 AM, Eric Swartz - WA6HHQ, Elecraft wrote: > Hi Roy, > > As of today, we have made the following enhancements to all K3s leaving > the factory: > > K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) > K3 AUTOMATIC FRONT END PROTECTION (1 wire mod) > K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 resistor value > change) > > Based on feedback form those that have tried the preliminary release of > these changes, we are comfortable with adding them as standard K3 features. > > Please note that the last item, the IF Output Buffer Gain mMod, is > slightly different than the similar N8LP mod some have been performing > on their K3s independently. We determined that only one value needs to > change to implement the gain increase for the IF output. We are changing > R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may > also leave it as is.) > > Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is > already available on the web page at: > > http://www.elecraft.com/K3/k3_software.htm > > This release includes: > > *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. > *AUTONOTCH depth improved. > *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). > *VFOs NOW TUNE DOWN TO 490 kHz. > > We never sleep in Aptos! :-) > > 73, Eric WA6HHQ > > Roy Morris wrote: >> I would like to know if is the intention of Elecraft to incorporate the K3 >> AUTOMATIC FRONT-END PROTECTION mod and the K3VFO TUNING NOISE REDUCTION mod >> in future PC boards. If so, I plan to install these mods in my K3s. Roy >> Morris W4WFB >> > __ > 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 Future Factory Hardware Updates; + New beta f/w release 3.27
Eric Swartz - WA6HHQ, Elecraft wrote: > Hi Roy, > > As of today, we have made the following enhancements to all K3s leaving > the factory: > > K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) > K3 AUTOMATIC FRONT END PROTECTION (1 wire mod) > K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 resistor value > change) > > Based on feedback form those that have tried the preliminary release of > these changes, we are comfortable with adding them as standard K3 features. > > Please note that the last item, the IF Output Buffer Gain mMod, is > slightly different than the similar N8LP mod some have been performing > on their K3s independently. We determined that only one value needs to > change to implement the gain increase for the IF output. We are changing > R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may > also leave it as is.) > > Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is > already available on the web page at: > > http://www.elecraft.com/K3/k3_software.htm > > This release includes: > > *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. > *AUTONOTCH depth improved. > *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). > *VFOs NOW TUNE DOWN TO 490 kHz. > > We never sleep in Aptos! :-) > > 73, Eric WA6HHQ > > Roy Morris wrote: >> I would like to know if is the intention of Elecraft to incorporate the K3 >> AUTOMATIC FRONT-END PROTECTION mod and the K3VFO TUNING NOISE REDUCTION mod >> in future PC boards. If so, I plan to install these mods in my K3s. Roy >> Morris W4WFB >> > __ > 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 > Yup...my Auto-Notch works now!! Good goin' guys!! I've been told by family members that I tend to gush, but honestly, where else can you find the level of customer service that we have with Elecraft? Truly terrific!! -- 73, Dick ka1oz Middleborough, MA Radio: Elecraft K3/100(Kit) SN 859 Antenna: Titan-DX __ 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 Future Factory Hardware Updates; + New beta f/w release 3.27
Joe, Are you making an assumption that the P3 input impedance is 50 ohms? That may or may not be true. I don't know the design parameters of the P3, but it certainly occurs to me that it is not necessary to use a 50 ohm input impedance. Yes, SDR-IQ and LP-PAN have the 50 ohm input, so connecting those devices to the K3 IF Out would cause loss. 73, Don W3FPR Joe Subich, W4TV wrote: > >> A 50-ohm match is not required in any case. >> > > That’s not exactly true. With devices like LP-Pan or > SDR-IQ that have 50 Ohm inputs connected to what is a > high impedance output, the transfer loss (antenna to > IF) was still in the range of -6dB even with the N8LP > modification. The rest of the solution was to use a > Clifton Labs Z-1 buffer amplifier (high impedance > input) in a unity gain configuration, install a 4:1 or > 9:1 (step down) transformer, or modify the SDR-IQ for > a 200 Ohm input. > > 73, > >... Joe, W4TV > > __ 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 Future Factory Hardware Updates; + New beta f/w release 3.27
> A 50-ohm match is not required in any case. Thats not exactly true. With devices like LP-Pan or SDR-IQ that have 50 Ohm inputs connected to what is a high impedance output, the transfer loss (antenna to IF) was still in the range of -6dB even with the N8LP modification. The rest of the solution was to use a Clifton Labs Z-1 buffer amplifier (high impedance input) in a unity gain configuration, install a 4:1 or 9:1 (step down) transformer, or modify the SDR-IQ for a 200 Ohm input. 73, ... Joe, W4TV > -Original Message- > From: Alan Bloom [mailto:n...@cds1.net] > Sent: Tuesday, August 25, 2009 4:17 PM > To: li...@subich.com > Cc: 'Eric Swartz - WA6HHQ, Elecraft'; elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 Future Factory Hardware Updates; + > New beta f/w release 3.27 > > > The resistor change increases the IF output signal by a > little over 10 dB. > > It's interesting to note that changing the FET source > resistor does not result in a 50-ohm output impedance because > the resistor is in parallel with the FET source resistance. > A 50-ohm match is not required in any case. > > Al N1AL > > > On Tue, 2009-08-25 at 16:11 -0400, Joe Subich, W4TV wrote: > > Eric, > > > > > Please note that the last item, the IF Output Buffer Gain mMod, > > > is slightly different than the similar N8LP mod some have been > > > performing on their K3s independently. We determined that only > > > one value needs to change to implement the gain increase for > > > the IF output. We are changing R8 from 1K ohms to 13K ohms. > > > > Are you saying it is not necessary to increase the current in > > J309 to handle the higher signal levels? > > > > With this change, what is the transfer gain/loss from the antenna > > input to the IF output with the IF output terminated in 50 Ohms? > > > > 73, > > > >... Joe, W4TV > > > > > > > > > -Original Message- > > > From: elecraft-boun...@mailman.qth.net > > > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Eric > > > Swartz - WA6HHQ, Elecraft > > > Sent: Tuesday, August 25, 2009 1:53 PM > > > To: elecraft@mailman.qth.net > > > Subject: Re: [Elecraft] K3 Future Factory Hardware Updates; + > > > New beta f/w release 3.27 > > > > > > > > > Hi Roy, > > > > > > As of today, we have made the following enhancements to all > > > K3s leaving > > > the factory: > > > > > > K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) K3 > > > AUTOMATIC FRONT END PROTECTION (1 wire mod) K3 IF OUTPUT BUFFER > > > GAIN MOD (For the P3, LP-PAN etc) (1 resistor value > > > change) > > > > > > Based on feedback form those that have tried the preliminary > > > release of > > > these changes, we are comfortable with adding them as > > > standard K3 features. > > > > > > Please note that the last item, the IF Output Buffer Gain mMod, is > > > slightly different than the similar N8LP mod some have been > > > performing > > > on their K3s independently. We determined that only one value > > > needs to > > > change to implement the gain increase for the IF output. We > > > are changing > > > R8 from 1K ohms to 13K ohms. (Those that have made the > N8LP mod may > > > also leave it as is.) > > > > > > Also, we are releasing new beta f/w today, MCU 3.27/DSP > 2.24. This > > > is > > > already available on the web page at: > > > > > > http://www.elecraft.com/K3/k3_software.htm > > > > > > This release includes: > > > > > > *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. > > > *AUTONOTCH depth improved. > > > *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). > > > *VFOs NOW TUNE DOWN TO 490 kHz. > > > > > > We never sleep in Aptos! :-) > > > > > > 73, Eric WA6HHQ > > > > > > Roy Morris wrote: > > > > I would like to know if is the intention of Elecraft to > > > > incorporate > > > > the K3 AUTOMATIC FRONT-END PROTECTION mod and the K3VFO > > > TUNING NOISE REDUCTION mod in future PC boards. If so, I > > > plan to install these mods in my K3s. Roy Morris W4WFB > > > > > > > __ > > > Elecraft mailing list > > > Home: ht
Re: [Elecraft] K3 Future Factory Hardware Updates; + New beta f/w release 3.27
Eric, There were two questions. I am most interested in the answer to the second question, repeated here below. Thanks, Richard, K5BWV == Eric Swartz - WA6HHQ, Elecraft wrote: > yes > > Eric > _..._ > -Original Message- > From: "Joe Subich, W4TV" > Date: Tuesday, Aug 25, 2009 1:11 pm > Subject: RE: [Elecraft] K3 Future Factory Hardware Updates; + New beta f/w > release 3.27 > To: Reply-To: "'Eric Swartz - WA6HHQ, Elecraft'" > , > > > Eric, > .. ... > With this change, what is the transfer gain/loss from the antenna > input to the IF output with the IF output terminated in 50 Ohms? > > 73, > __ 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 Future Factory Hardware Updates; + New beta f/w release 3.27
yes Eric _..._ -Original Message- From: "Joe Subich, W4TV" Date: Tuesday, Aug 25, 2009 1:11 pm Subject: RE: [Elecraft] K3 Future Factory Hardware Updates; + New beta f/w release 3.27 To: Reply-To: "'Eric Swartz - WA6HHQ, Elecraft'" , Eric, > Please note that the last item, the IF Output Buffer Gain mMod, is slightly different than the similar N8LP mod some have been performing on their K3s independently. We determined that only one value needs to change to implement the gain increase for the IF output. We are changing R8 from 1K ohms to 13K ohms. Are you saying it is not necessary to increase the current in J309 to handle the higher signal levels? With this change, what is the transfer gain/loss from the antenna input to the IF output with the IF output terminated in 50 Ohms? 73, ... Joe, W4TV > -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Eric Swartz - WA6HHQ, Elecraft Sent: Tuesday, August 25, 2009 1:53 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Future Factory Hardware Updates; + New beta f/w release 3.27 Hi Roy, As of today, we have made the following enhancements to all K3s leaving the factory: K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) K3 AUTOMATIC FRONT END PROTECTION (1 wire mod) K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 resistor value change) Based on feedback form those that have tried the preliminary release of these changes, we are comfortable with adding them as standard K3 features. Please note that the last item, the IF Output Buffer Gain mMod, is slightly different than the similar N8LP mod some have been performing on their K3s independently. We determined that only one value needs to change to implement the gain increase for the IF output. We are changing R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may also leave it as is.) Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is already available on the web page at: http://www.elecraft.com/K3/k3_software.htm This release includes: *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. *AUTONOTCH depth improved. *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). *VFOs NOW TUNE DOWN TO 490 kHz. We never sleep in Aptos! :-) 73, Eric WA6HHQ Roy Morris wrote: > I would like to know if is the intention of Elecraft to incorporate > the K3 AUTOMATIC FRONT-END PROTECTION mod and the K3VFO TUNING NOISE REDUCTION mod in future PC boards. If so, I plan to install these mods in my K3s. Roy Morris W4WFB > __ 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 Future Factory Hardware Updates; + New beta f/w release 3.27
The resistor change increases the IF output signal by a little over 10 dB. It's interesting to note that changing the FET source resistor does not result in a 50-ohm output impedance because the resistor is in parallel with the FET source resistance. A 50-ohm match is not required in any case. Al N1AL On Tue, 2009-08-25 at 16:11 -0400, Joe Subich, W4TV wrote: > Eric, > > > Please note that the last item, the IF Output Buffer Gain mMod, > > is slightly different than the similar N8LP mod some have been > > performing on their K3s independently. We determined that only > > one value needs to change to implement the gain increase for > > the IF output. We are changing R8 from 1K ohms to 13K ohms. > > Are you saying it is not necessary to increase the current in > J309 to handle the higher signal levels? > > With this change, what is the transfer gain/loss from the antenna > input to the IF output with the IF output terminated in 50 Ohms? > > 73, > >... Joe, W4TV > > > > > -Original Message- > > From: elecraft-boun...@mailman.qth.net > > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Eric > > Swartz - WA6HHQ, Elecraft > > Sent: Tuesday, August 25, 2009 1:53 PM > > To: elecraft@mailman.qth.net > > Subject: Re: [Elecraft] K3 Future Factory Hardware Updates; + > > New beta f/w release 3.27 > > > > > > Hi Roy, > > > > As of today, we have made the following enhancements to all > > K3s leaving > > the factory: > > > > K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) > > K3 AUTOMATIC FRONT END PROTECTION (1 wire mod) > > K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 > > resistor value > > change) > > > > Based on feedback form those that have tried the preliminary > > release of > > these changes, we are comfortable with adding them as > > standard K3 features. > > > > Please note that the last item, the IF Output Buffer Gain mMod, is > > slightly different than the similar N8LP mod some have been > > performing > > on their K3s independently. We determined that only one value > > needs to > > change to implement the gain increase for the IF output. We > > are changing > > R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may > > also leave it as is.) > > > > Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is > > already available on the web page at: > > > > http://www.elecraft.com/K3/k3_software.htm > > > > This release includes: > > > > *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. > > *AUTONOTCH depth improved. > > *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). > > *VFOs NOW TUNE DOWN TO 490 kHz. > > > > We never sleep in Aptos! :-) > > > > 73, Eric WA6HHQ > > > > Roy Morris wrote: > > > I would like to know if is the intention of Elecraft to incorporate > > > the K3 AUTOMATIC FRONT-END PROTECTION mod and the K3VFO > > TUNING NOISE REDUCTION mod in future PC boards. If so, I > > plan to install these mods in my K3s. Roy Morris W4WFB > > > > > __ > > 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 Future Factory Hardware Updates; + New beta f/w release 3.27
Eric, > Please note that the last item, the IF Output Buffer Gain mMod, > is slightly different than the similar N8LP mod some have been > performing on their K3s independently. We determined that only > one value needs to change to implement the gain increase for > the IF output. We are changing R8 from 1K ohms to 13K ohms. Are you saying it is not necessary to increase the current in J309 to handle the higher signal levels? With this change, what is the transfer gain/loss from the antenna input to the IF output with the IF output terminated in 50 Ohms? 73, ... Joe, W4TV > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Eric > Swartz - WA6HHQ, Elecraft > Sent: Tuesday, August 25, 2009 1:53 PM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 Future Factory Hardware Updates; + > New beta f/w release 3.27 > > > Hi Roy, > > As of today, we have made the following enhancements to all > K3s leaving > the factory: > > K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) > K3 AUTOMATIC FRONT END PROTECTION (1 wire mod) > K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 > resistor value > change) > > Based on feedback form those that have tried the preliminary > release of > these changes, we are comfortable with adding them as > standard K3 features. > > Please note that the last item, the IF Output Buffer Gain mMod, is > slightly different than the similar N8LP mod some have been > performing > on their K3s independently. We determined that only one value > needs to > change to implement the gain increase for the IF output. We > are changing > R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may > also leave it as is.) > > Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is > already available on the web page at: > > http://www.elecraft.com/K3/k3_software.htm > > This release includes: > > *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. > *AUTONOTCH depth improved. > *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). > *VFOs NOW TUNE DOWN TO 490 kHz. > > We never sleep in Aptos! :-) > > 73, Eric WA6HHQ > > Roy Morris wrote: > > I would like to know if is the intention of Elecraft to incorporate > > the K3 AUTOMATIC FRONT-END PROTECTION mod and the K3VFO > TUNING NOISE REDUCTION mod in future PC boards. If so, I > plan to install these mods in my K3s. Roy Morris W4WFB > > > __ > 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 Future Factory Hardware Updates; + New beta f/w release 3.27
Hi Roy, As of today, we have made the following enhancements to all K3s leaving the factory: K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later) K3 AUTOMATIC FRONT END PROTECTION (1 wire mod) K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 resistor value change) Based on feedback form those that have tried the preliminary release of these changes, we are comfortable with adding them as standard K3 features. Please note that the last item, the IF Output Buffer Gain mMod, is slightly different than the similar N8LP mod some have been performing on their K3s independently. We determined that only one value needs to change to implement the gain increase for the IF output. We are changing R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may also leave it as is.) Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is already available on the web page at: http://www.elecraft.com/K3/k3_software.htm This release includes: *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS. *AUTONOTCH depth improved. *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz). *VFOs NOW TUNE DOWN TO 490 kHz. We never sleep in Aptos! :-) 73, Eric WA6HHQ Roy Morris wrote: > I would like to know if is the intention of Elecraft to incorporate the K3 > AUTOMATIC FRONT-END PROTECTION mod and the K3VFO TUNING NOISE REDUCTION mod > in future PC boards. If so, I plan to install these mods in my K3s. Roy > Morris W4WFB > __ 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
