[Elecraft] Curious
Does the Elecraft technical department ever answer emails? W5SUM Sent from my iPhone __ 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] Curious
Ronnie, Yes they do, but due to Covid-19 and short staffing, it may take a while. If you did not direct your email to supp...@elecraft.com, it may take a while to get it from one email address to another until it finally hits support. 73, Don W3FPR On 5/19/2021 6:22 PM, Ronnie Hull wrote: Does the Elecraft technical department ever answer emails? W5SUM __ 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] Curious K2 behavior?
Last weekend I took my K2 to the Huntsville Hamfest to help out with the Elecraft booth there. I had a gel cell battery hooked up to it so folks could twist knobs, push buttons and see what happened. Several folks did. Today I turned the K2 on for the first time since then and strangely I had to retune the KAT2 for all bands on both my dipoles. As far as I can tell, neither dipole has changed physically. One is an attic dipole and the other is an inverted vee hung from trees in the yard. Both are fed with ladderline. The attic dipole uses an LDG BA-1 4:1 balun and the inverted vee uses the Elecraft BL-2 set to 4:1. I had the inverted vee attached to Ant 1 and the attic antenna to Ant 2. Both had been automatically tuned by the KAT2 to better than 1.2:1 on 80m through 10m before the hamfest. I thought at first that maybe something had reset all my internal data, but all the menu parameters I've checked, including the filter settings, are unchanged. Would some set of button punches have cleared my KAT2 settings while leaving everything else ok? I did not have an antenna or dummy load connected to the K2 at the hamfest, but I'm pretty sure I would have noticed someone doing Tune on all the bands on both antennas! Retuning the KAT2 worked fine, so there's no residual problem, but it's a puzzle to me as to how this could have happened??? 73, Randy, KS4L ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Curious K2 behavior?
Randy, I would suggest that at some time or other, someone pressed the TUNE button while they were exploring the operation of your K2 - in fact, it may have happened several times. Pressing TUNE with something other than your normal antenna will change the ATU settings. Setting the menu items takes multiple button presses, but doing a TUNE is just a one button operation, and yes it is likely that someone 'trying out the K2' would press that button. Next time, connect a dummy load to both the ANT1 and ANT2 jacks to protect your K2 from any possible damage (but that will not prevent changing the ATU settings for each band). 73, Don W3FPR Randy wrote: Last weekend I took my K2 to the Huntsville Hamfest to help out with the Elecraft booth there. I had a gel cell battery hooked up to it so folks could twist knobs, push buttons and see what happened. Several folks did. Today I turned the K2 on for the first time since then and strangely I had to retune the KAT2 for all bands on both my dipoles. As far as I can tell, neither dipole has changed physically. One is an attic dipole and the other is an inverted vee hung from trees in the yard. Both are fed with ladderline. The attic dipole uses an LDG BA-1 4:1 balun and the inverted vee uses the Elecraft BL-2 set to 4:1. I had the inverted vee attached to Ant 1 and the attic antenna to Ant 2. Both had been automatically tuned by the KAT2 to better than 1.2:1 on 80m through 10m before the hamfest. I thought at first that maybe something had reset all my internal data, but all the menu parameters I've checked, including the filter settings, are unchanged. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Curious Power Output on PSK
Hello All; I am a new K3/100 owner (sn 3045) and a relatively new ham. I come from an art background so please forgive my ignorance. I use my K3 mostly for soundcard digital and I've noticed something peculiar. Wayne suggests setting the soundcard's outputs (Master & Wave) to 50% and use the Mic Gain to drive the output until either 4 bars of ALC show or the output power level is just below the target power output set on the K3. Since no ALC shows on my set-up anywhere near the point the target output is achieved, the latter procedure is applicable here. When I set the power on the K3 to 50 watts, I am looking for an output level of 40-45 watts. When I start out or switch to a new band, tune the band on my doublet or G5RV and key down, the Mic Gain will be at something like 43 (out of 60) to achieve 40-45 watts. So far so good. But slowly the output creeps up. I keep readjusting the Mic Gain downwards and it usually settles around 27 to where the 40-45 watts power out stays consistent. If I leave it at 27 and switch bands, 27 will produce less than 10 watts! Even if I switch back to the same band. The K3 will eventually level back out at 27. Last night I left the radio on all night after using it and when I came back to it this morning, the 27 level still worked perfectly right away. This seems odd to me. Is this to be expected? I wonder what is going on. 73 de Eric, KG6MZS __ 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] Curious behaviour of XV50 LEDs
Hi I have completed construction of an XV50, in fact I finished it a while ago, and it all seems ok except for one thing. The Tx power LED display only lights one at a time, even though I have GRPH=BAR and OPT=PERF selected on the K2. It does the same if GRPH=DOT is selected, too. Is this possibly due to an assembly fault? If so I'd be glad of an indication of where to look. I have done very careful inspections of my soldering and can see no dodgy joint that may be the culprit. Is there perhaps one connection that may cause this, or any diagnostic procedure that I can follow to trace the fault? I am using it as the only XV connected to my K2. the K2 software is displayed as '2.01H 1.02', and the XV50 U1 has a label with 1.6e on it. I have K2 #2378 (without the 100W amp etc) with the A to B updates and K160RX, KNB2, KIO2, KDSP2, KSB2 and KAT2 installed. An external meter shows that the power going out to the antenna is what it should be according to the one lit LED. I must have done something silly to get this effect, but I am flummoxed. Has anyone else experienced this phenomenon? I've seen a lot of problems solved on this reflector, and hope that the kind and knowledgeable people out there may be able to help with this one. I normally read any Email -- it's almost only this reflector, in digest form -- once a week on Sunday evening, so please forgive delays in replying to any response to my plea. 73 all Harry Weston M0SOP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Curious Power Output on PSK
Hello Eric! > I use my K3 mostly for soundcard digital and I've noticed something > peculiar. Wayne suggests setting the soundcard's outputs (Master & > Wave) to 50% and use the Mic Gain to drive the output until either 4 > bars of ALC show Correct. > or the output power level is just below the target > power output set on the K3. I think this is a misunderstanding. There must be at least 4 bars of ALC. On the K3, the ALC indicator is based on audio input, *not* RF feedback. If you can't get 4 bars of ALC, you need more audio from the computer, or more LINE IN gain. If you have less drive, you will get Tx Power creep, because the system Tx gain is set based on the audio level being at least 4 bars of ALC. Hope this is helpful to you. 73, Lyle KK7P __ 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] Curious phenomenon with doublet on 80m
Hello everybody, Tonight I wanted to work station on 3504kHz but was not able to tune with K3 to transmit on that frequency. Here are the facts: - The antenna is multi-band dipole, a.k.a Van Gorden or Doublet - 137ft dipole center fed with 450 Ohm ladder line. - I do not use KAT3, it is installed but bypassed in this configuration. I use MFJ-986 Differential-T tuner with built-in balun. - I able to tune down to 1.1:1 on all frequencies above about 3505 with K3 and any other transceiver I tried. The optimal tuner settings at any given frequency are the same for all transceivers (besides K3 I tried Kenwood TS-930S and TS-570D with autotuner bypassed on both). - My setting for tune power on K3 is 30W, on TS-570D - 30W, on TS-930S - 50W - On frequencies 3501 to 3505 with both Kenwood transceivers the tuning is normal. With K3 the SWR is through the roof and there is no way I can find resonance to see reasonable SWR. - There is significant "hysteresis" to the phenomenon. When I move down on frequency I am able to tune down to 3505 or so. When I see the problem I have to return to about 3520 to see normal SWR again. - The problem seem to be apparent only on this small part of the band. I took time to go down from 3900 and was able to tune everywhere. Also I didn't see any problem on low portion of 40m band. Unfortunately, I don't have other antenna on 80m to compare. However, the fact that I don't see any issues with the same setup with different transceivers tells me that antenna and tuner probably are OK. I tried to tune K3 with different power: from 10W to 50W - same behavior. I do not have dummy load available at this moment, I will try tomorrow with dummy load. Any thoughts? 73, Igor, N1YX __ 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] Curious problem after installing KPA3 and KAT3
Hi Folks, Installing the KPA3 and KAT3 is pretty straight forward. That's why I don't understand what's wrong. Looks like ANT1 and ANT2 are both open. I can see the leads physically connected in the right order to the KAT3. The KAT3 is enabled in the menu, as is the KPA3. But when I tried to run the calibration program, it says the SWR is too high. When I attempt to transmit with just 5 watts, the internal SWR meter indicates very high SWR. I admit that I am recovering from major surgery (with the usual assortment of drugs) and my brain may not be fully functional yet, but I can't see what I may have done wrong... Any thoughts? Thanks, Doug -- K0DXV __ 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] Curious phenomenon with doublet on 80m
Igor, Double check to be certain the KAT3 is bypassed on that portion of the band. Remember that the KAT3 segments the bands in order to provide greater coverage after initially tuning with a given antenna. 73, Don W3FPR On 1/3/2011 1:30 AM, Igor Kosvin wrote: > Hello everybody, > > Tonight I wanted to work station on 3504kHz but was not able to tune with K3 > to transmit on that frequency. Here are the facts: > > - The antenna is multi-band dipole, a.k.a Van Gorden or Doublet - > 137ft dipole center fed with 450 Ohm ladder line. > > - I do not use KAT3, it is installed but bypassed in this > configuration. I use MFJ-986 Differential-T tuner with built-in balun. > > - I able to tune down to 1.1:1 on all frequencies above about 3505 > with K3 and any other transceiver I tried. The optimal tuner settings at any > given frequency are the same for all transceivers (besides K3 I tried > Kenwood TS-930S and TS-570D with autotuner bypassed on both). > > - My setting for tune power on K3 is 30W, on TS-570D - 30W, on > TS-930S - 50W > > - On frequencies 3501 to 3505 with both Kenwood transceivers the > tuning is normal. With K3 the SWR is through the roof and there is no way I > can find resonance to see reasonable SWR. > > - There is significant "hysteresis" to the phenomenon. When I move > down on frequency I am able to tune down to 3505 or so. When I see the > problem I have to return to about 3520 to see normal SWR again. > > - The problem seem to be apparent only on this small part of the > band. I took time to go down from 3900 and was able to tune everywhere. Also > I didn't see any problem on low portion of 40m band. > > Unfortunately, I don't have other antenna on 80m to compare. However, the > fact that I don't see any issues with the same setup with different > transceivers tells me that antenna and tuner probably are OK. I tried to > tune K3 with different power: from 10W to 50W - same behavior. I do not have > dummy load available at this moment, I will try tomorrow with dummy load. > > > > Any thoughts? > > 73, > > Igor, N1YX > > __ > 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] Curious phenomenon with doublet on 80m
Hi Chen, I did connect dummy load tonight. With the dummy load the SWR at the problematic region is fine, but I see different symptom. When I activate tune everywhere else I see on the display: top line "1.0-1", bottom line "30 W". Which corresponds to my tuning power. Both lines are stable and the power meter shows accurate 30W or so. At the problematic region the top line alternates between "1.0-1" and "--" and the bottom line reading is very unstable - the power jumps randomly from 18W to 48W, so is the reading of wattmeter - it is also unstable. The returned power stays pretty low though. The meter bars on K3 also unstable. The SWR shows one bar and it is blinking fast. The RF is jumping randomly. I do not have presently neither VNA nor Antenna Analyzer. I guess though that use of dummy load pretty much exonerates antenna or tuner. The dummy load is just one big resistor with very low reactance. 73, Igor, N1YX -Original Message- From: Kok Chen [mailto:c...@mac.com] Sent: Monday, January 03, 2011 2:02 AM To: Igor Kosvin Subject: Re: [Elecraft] Curious phenomenon with doublet on 80m Hi Igor, You are correct that you should try to see if the K3 will work properly into a dummy load at 3504 kHz. Do you have an Antenna Analyzer or VNA? If so, I would suggest tuning the MFJ to match the Kenwood rigs, then remove the rigs from the tuner and use to antenna analyzer to look into the MFJ's Tx connector instead of connecting the K3. The impedance that you read on the analyzer might give a clue as to why the K3 can't work into it. Vy 73 Chen, W7AY __ 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] Curious phenomenon with doublet on 80m
Hi Don, Yes, the KAT3 is bypassed as far as I can see. The ATU on display is not lit. I toggled with long hold of ATU TUNE and the last I see is Bypassed and the ATU goes off. I also don't see any ATU activity (relays etc.) when I press TUNE. 73, Igor, N1YX -Original Message- From: Don Wilhelm [mailto:w3...@embarqmail.com] Sent: Monday, January 03, 2011 8:34 AM To: Igor Kosvin Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Curious phenomenon with doublet on 80m Igor, Double check to be certain the KAT3 is bypassed on that portion of the band. Remember that the KAT3 segments the bands in order to provide greater coverage after initially tuning with a given antenna. 73, Don W3FPR On 1/3/2011 1:30 AM, Igor Kosvin wrote: > Hello everybody, > > Tonight I wanted to work station on 3504kHz but was not able to tune with K3 > to transmit on that frequency. Here are the facts: > > - The antenna is multi-band dipole, a.k.a Van Gorden or Doublet - > 137ft dipole center fed with 450 Ohm ladder line. > > - I do not use KAT3, it is installed but bypassed in this > configuration. I use MFJ-986 Differential-T tuner with built-in balun. > > - I able to tune down to 1.1:1 on all frequencies above about 3505 > with K3 and any other transceiver I tried. The optimal tuner settings at any > given frequency are the same for all transceivers (besides K3 I tried > Kenwood TS-930S and TS-570D with autotuner bypassed on both). > > - My setting for tune power on K3 is 30W, on TS-570D - 30W, on > TS-930S - 50W > > - On frequencies 3501 to 3505 with both Kenwood transceivers the > tuning is normal. With K3 the SWR is through the roof and there is no way I > can find resonance to see reasonable SWR. > > - There is significant "hysteresis" to the phenomenon. When I move > down on frequency I am able to tune down to 3505 or so. When I see the > problem I have to return to about 3520 to see normal SWR again. > > - The problem seem to be apparent only on this small part of the > band. I took time to go down from 3900 and was able to tune everywhere. Also > I didn't see any problem on low portion of 40m band. > > Unfortunately, I don't have other antenna on 80m to compare. However, the > fact that I don't see any issues with the same setup with different > transceivers tells me that antenna and tuner probably are OK. I tried to > tune K3 with different power: from 10W to 50W - same behavior. I do not have > dummy load available at this moment, I will try tomorrow with dummy load. > > > > Any thoughts? > > 73, > > Igor, N1YX > > __ > 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] Curious phenomenon with doublet on 80m
Hi, I had a similar problem last year in ARRL SS where the power output jumped around. Gary suggested doing the power calibration again. I had little trouble getting it done in the Utility but doing it manually got things settled down again. I'm not sure that this fixed whatever the problem was (why did the calibration have to be done again) but it fixed the symptoms as it hasn't done it again. Well maybe it did it a bit once or twice at C6AKX this year. Dunno. Try it. 73, Fred KE7X -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Igor Kosvin Sent: Monday, January 03, 2011 4:24 PM To: 'Kok Chen' Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Curious phenomenon with doublet on 80m Hi Chen, I did connect dummy load tonight. With the dummy load the SWR at the problematic region is fine, but I see different symptom. When I activate tune everywhere else I see on the display: top line "1.0-1", bottom line "30 W". Which corresponds to my tuning power. Both lines are stable and the power meter shows accurate 30W or so. At the problematic region the top line alternates between "1.0-1" and "--" and the bottom line reading is very unstable - the power jumps randomly from 18W to 48W, so is the reading of wattmeter - it is also unstable. The returned power stays pretty low though. The meter bars on K3 also unstable. The SWR shows one bar and it is blinking fast. The RF is jumping randomly. I do not have presently neither VNA nor Antenna Analyzer. I guess though that use of dummy load pretty much exonerates antenna or tuner. The dummy load is just one big resistor with very low reactance. 73, Igor, N1YX -Original Message- From: Kok Chen [mailto:c...@mac.com] Sent: Monday, January 03, 2011 2:02 AM To: Igor Kosvin Subject: Re: [Elecraft] Curious phenomenon with doublet on 80m Hi Igor, You are correct that you should try to see if the K3 will work properly into a dummy load at 3504 kHz. Do you have an Antenna Analyzer or VNA? If so, I would suggest tuning the MFJ to match the Kenwood rigs, then remove the rigs from the tuner and use to antenna analyzer to look into the MFJ's Tx connector instead of connecting the K3. The impedance that you read on the analyzer might give a clue as to why the K3 can't work into it. Vy 73 Chen, W7AY __ 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] Curious phenomenon with doublet on 80m
> > With the dummy load the SWR at the > problematic region is fine, butat the problematic region the > top line alternates between "1.0-1" and "--" and the bottom line reading > is very unstable - the power jumps randomly... > Sounds like there's a lookup table in memory with a piece of bad data in it. If so, there must be a way to re-write itMaybe a way to re-init the ATU. Tony KT0NY > > __ 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] Curious problem after installing KPA3 and KAT3
Doug Person wrote: > Hi Folks, > > Installing the KPA3 and KAT3 is pretty straight forward. That's why I > don't understand what's wrong. Looks like ANT1 and ANT2 are both open. > I can see the leads physically connected in the right order to the > KAT3. The KAT3 is enabled in the menu, as is the KPA3. But when I > tried to run the calibration program, it says the SWR is too high. When > I attempt to transmit with just 5 watts, the internal SWR meter > indicates very high SWR. Make sure that the connector on the bottom of the KAT3 is lined up properly. I succeeded in getting it wrong once (although I noticed it before trying it out, so I don't know if this is the symptom you'd see). -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco __ 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] Curious problem after installing KPA3 and KAT3
Yes, of course. And verified the dummy load was working correctly with an MFJ 259. N5GE wrote: > Doug Person wrote: >> Hi Folks, >> >> Installing the KPA3 and KAT3 is pretty straight forward. That's why >> I don't understand what's wrong. Looks like ANT1 and ANT2 are both >> open. I can see the leads physically connected in the right order to >> the KAT3. The KAT3 is enabled in the menu, as is the KPA3. But when >> I tried to run the calibration program, it says the SWR is too high. >> When I attempt to transmit with just 5 watts, the internal SWR meter >> indicates very high SWR. >> >> I admit that I am recovering from major surgery (with the usual >> assortment of drugs) and my brain may not be fully functional yet, >> but I can't see what I may have done wrong... >> >> Any thoughts? >> >> Thanks, >> >> Doug -- K0DXV >> __ >> 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 >> >> > Did you connect a dummy load to the antenna connection? > > Tom, N5GE > > __ 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] Curious problem after installing KPA3 and KAT3
I removed the KAT3 and reinstalled the KANT3. SWR now normal. Doug -- K0DXV > > > > At 22:59 07/27/2009, you wrote: >> Hi Folks, >> >> Installing the KPA3 and KAT3 is pretty straight forward. That's why I >> don't understand what's wrong. Looks like ANT1 and ANT2 are both open. >> I can see the leads physically connected in the right order to the >> KAT3. The KAT3 is enabled in the menu, as is the KPA3. But when I >> tried to run the calibration program, it says the SWR is too high. When >> I attempt to transmit with just 5 watts, the internal SWR meter >> indicates very high SWR. >> >> I admit that I am recovering from major surgery (with the usual >> assortment of drugs) and my brain may not be fully functional yet, but I >> can't see what I may have done wrong... >> >> Any thoughts? >> >> Thanks, >> >> Doug -- K0DXV >> __ >> 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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
I have a curiosity question. Why is the KXFL3 roofing filter an option on the KX3? I mean, why is it not a built-in feature of the KX3? First, I already own a KX3 with the KXFL3 filter so I am not asking this in order to choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, or troglodyte) in this sort of radio technology and still in learner mode. But, it seems to me that the KXFL3 roofing filter is almost required with a radio as nice as the KX3. Without it, as I understand the function, any crowded band interval like a pileup or close-in CW signals and such would render a KX3 (without the roofing filter) with less than the usual Elecraft stellar RX performance. My guess, and this is only a wild guess, is that maybe the option leads this space open to future improved roofing filters? Or, maybe even leave it open to a 3rd party market supplied filter (although, I think this filter is particularly different from other typical 3rd party filters). 73, phil, K7PEH __ 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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
Hi Phil, The roofing filter module (KXFL3) is expensive for us to manufacture because of the extremely tight tolerances on the capacitors (0.1% in some cases). They have to be matched by hand. We didn't want to pass this cost on to all KX3 users, since many of them don't require the roofing filters. Even without them, the KX3's receiver performance would fall into the top 6 or so radios as measured by Sherwood Engineering (http://www.sherweng.com/table.html). 73, Wayne N6KR On Apr 10, 2014, at 7:56 AM, Phil Hystad wrote: > I have a curiosity question. Why is the KXFL3 roofing filter an option on > the KX3? I mean, why is it not a built-in feature of the KX3? First, I > already own a KX3 with the KXFL3 filter so I am not asking this in order to > choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, > or troglodyte) in this sort of radio technology and still in learner mode. > > But, it seems to me that the KXFL3 roofing filter is almost required with a > radio as nice as the KX3. Without it, as I understand the function, any > crowded band interval like a pileup or close-in CW signals and such would > render a KX3 (without the roofing filter) with less than the usual Elecraft > stellar RX performance. > > My guess, and this is only a wild guess, is that maybe the option leads this > space open to future improved roofing filters? Or, maybe even leave it open > to a 3rd party market supplied filter (although, I think this filter is > particularly different from other typical 3rd party filters). > > 73, phil, K7PEH __ 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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
I figured cost was likely the main reason but then when I bought the KX3. I do have another question on the KX3 but I need to study the technical aspects of the question first and maybe I can answer it myself (it has to do with the mixer). phil On Apr 10, 2014, at 8:02 AM, Wayne Burdick wrote: > Hi Phil, > > The roofing filter module (KXFL3) is expensive for us to manufacture because > of the extremely tight tolerances on the capacitors (0.1% in some cases). > They have to be matched by hand. > > We didn't want to pass this cost on to all KX3 users, since many of them > don't require the roofing filters. Even without them, the KX3's receiver > performance would fall into the top 6 or so radios as measured by Sherwood > Engineering (http://www.sherweng.com/table.html). > > 73, > Wayne > N6KR > > > On Apr 10, 2014, at 7:56 AM, Phil Hystad wrote: > >> I have a curiosity question. Why is the KXFL3 roofing filter an option on >> the KX3? I mean, why is it not a built-in feature of the KX3? First, I >> already own a KX3 with the KXFL3 filter so I am not asking this in order to >> choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, >> or troglodyte) in this sort of radio technology and still in learner mode. >> >> But, it seems to me that the KXFL3 roofing filter is almost required with a >> radio as nice as the KX3. Without it, as I understand the function, any >> crowded band interval like a pileup or close-in CW signals and such would >> render a KX3 (without the roofing filter) with less than the usual Elecraft >> stellar RX performance. >> >> My guess, and this is only a wild guess, is that maybe the option leads this >> space open to future improved roofing filters? Or, maybe even leave it open >> to a 3rd party market supplied filter (although, I think this filter is >> particularly different from other typical 3rd party filters). >> >> 73, phil, K7PEH > > > __ 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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
Wayne, So is the KX3's receiver performance as measured by Sherwood Engineering with the optional filter? Keith Ennis -- View this message in context: http://elecraft.365791.n2.nabble.com/Curious-why-is-KXFL3-roofing-filter-an-option-on-KX3-tp7586967p7586971.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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
He measured it both ways. Both numbers are in the chart. Wayne N6KR On Apr 10, 2014, at 8:29 AM, XE3/K5ENS wrote: > Wayne, > > So is the KX3's receiver performance as measured by Sherwood Engineering > with the optional filter? > > Keith Ennis > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Curious-why-is-KXFL3-roofing-filter-an-option-on-KX3-tp7586967p7586971.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 n...@elecraft.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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
Hi Phil - I've had my KX3 since Christmas of last year. Also have a fairly well decked-out K3. My KX3 does NOT have the optional KXFL3 roofing filter. However, in the time that I've had the KX3 and been able to compare it's receive performance to that of the K3 - I have to say that I don't see any need (in my case) for the added expense. Granted, I don't do that much contesting, although I have dipped my toes into a couple here and there, as I was trying to pick off a few states to close out my 5BWAS. I've also used the KX3 in a number of fairly big pileups and the little rig has performed very well. It would be nice to have two of them, just to be able to compare having or not having the roofing filter. I know that you can "turn it on or off" in the menu but that might not be a valid way to compare. Anyway, I'm quite pleased with the receive performance of my KX3 w/o the filter. Jim / W6JHB On Thursday, Apr 10, 2014, at Thursday, 7:56 AM, Phil Hystad wrote: > I have a curiosity question. Why is the KXFL3 roofing filter an option on > the KX3? I mean, why is it not a built-in feature of the KX3? First, I > already own a KX3 with the KXFL3 filter so I am not asking this in order to > choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, > or troglodyte) in this sort of radio technology and still in learner mode. > > But, it seems to me that the KXFL3 roofing filter is almost required with a > radio as nice as the KX3. Without it, as I understand the function, any > crowded band interval like a pileup or close-in CW signals and such would > render a KX3 (without the roofing filter) with less than the usual Elecraft > stellar RX performance. > > My guess, and this is only a wild guess, is that maybe the option leads this > space open to future improved roofing filters? Or, maybe even leave it open > to a 3rd party market supplied filter (although, I think this filter is > particularly different from other typical 3rd party filters). > > 73, phil, K7PEH > > > > __ > 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 w6...@me.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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
I'd not have the KX3 without that option. But perhaps it would be just fine if not working CW. Same with the K3: Some do buy it with only the standard 2.7 KHz filter, and no CW filters. Phil W7OX On 4/10/14, 7:56 AM, Phil Hystad wrote: I have a curiosity question. Why is the KXFL3 roofing filter an option on the KX3? I mean, why is it not a built-in feature of the KX3? First, I already own a KX3 with the KXFL3 filter so I am not asking this in order to choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, or troglodyte) in this sort of radio technology and still in learner mode. But, it seems to me that the KXFL3 roofing filter is almost required with a radio as nice as the KX3. Without it, as I understand the function, any crowded band interval like a pileup or close-in CW signals and such would render a KX3 (without the roofing filter) with less than the usual Elecraft stellar RX performance. My guess, and this is only a wild guess, is that maybe the option leads this space open to future improved roofing filters? Or, maybe even leave it open to a 3rd party market supplied filter (although, I think this filter is particularly different from other typical 3rd party filters). 73, phil, K7PEH __ 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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
Jim, I don't do a lot of contesting but often will reply to contesting stations if they are DX or if they are from an unusual place for me (e.g. Rhode Island). But, with DX, and in particular when a DX station is popular such as the DXpeditions (e.g. TX6G) they will have a pileup (and, often operating split). I operate CW on all of these kinds of contacts so filtering to me is indeed important. So, without thinking of the price, I bought the filter for the KX3 in order to get the best they have to offer. I have yet to chase any kind of DXCC or WAS award certificate. I have no room on my walls for certificates so having such a thing means nothing to me as I know that I have worked all states for example (with the exception of Rhode Island but Rhode Island is smaller than some counties so I will pick that up if I decide to count counties). phil On Apr 10, 2014, at 8:48 AM, Jim Bennett wrote: > Hi Phil - > > I've had my KX3 since Christmas of last year. Also have a fairly well > decked-out K3. My KX3 does NOT have the optional KXFL3 roofing filter. > However, in the time that I've had the KX3 and been able to compare it's > receive performance to that of the K3 - I have to say that I don't see any > need (in my case) for the added expense. Granted, I don't do that much > contesting, although I have dipped my toes into a couple here and there, as I > was trying to pick off a few states to close out my 5BWAS. I've also used the > KX3 in a number of fairly big pileups and the little rig has performed very > well. It would be nice to have two of them, just to be able to compare having > or not having the roofing filter. I know that you can "turn it on or off" in > the menu but that might not be a valid way to compare. > > Anyway, I'm quite pleased with the receive performance of my KX3 w/o the > filter. > > Jim / W6JHB > > > On Thursday, Apr 10, 2014, at Thursday, 7:56 AM, Phil Hystad wrote: > >> I have a curiosity question. Why is the KXFL3 roofing filter an option on >> the KX3? I mean, why is it not a built-in feature of the KX3? First, I >> already own a KX3 with the KXFL3 filter so I am not asking this in order to >> choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, >> or troglodyte) in this sort of radio technology and still in learner mode. >> >> But, it seems to me that the KXFL3 roofing filter is almost required with a >> radio as nice as the KX3. Without it, as I understand the function, any >> crowded band interval like a pileup or close-in CW signals and such would >> render a KX3 (without the roofing filter) with less than the usual Elecraft >> stellar RX performance. >> >> My guess, and this is only a wild guess, is that maybe the option leads this >> space open to future improved roofing filters? Or, maybe even leave it open >> to a 3rd party market supplied filter (although, I think this filter is >> particularly different from other typical 3rd party filters). >> >> 73, phil, K7PEH >> >> >> >> __ >> 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 w6...@me.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 phys...@mac.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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
Phil, I concur -- in my second reply to Wayne, I truncated the first sentence (I think it was the first) and the result was not very meaningful. I had originally written something like "...but then when I bought the KX3 I ignored the price as I really wanted the KX3". I cut that out because I didn't want to let Wayne think that I would buy anything at any price -- well, maybe I would almost but I did really want the KX3 for portable ops. Now, I am wondering if I should keep my KX1. Oh, I will keep it but it is not being used anymore. phil On Apr 10, 2014, at 9:01 AM, Phil Wheeler wrote: > I'd not have the KX3 without that option. But perhaps it would be just fine > if not working CW. > > Same with the K3: Some do buy it with only the standard 2.7 KHz filter, and > no CW filters. > > Phil W7OX > > On 4/10/14, 7:56 AM, Phil Hystad wrote: >> I have a curiosity question. Why is the KXFL3 roofing filter an option on >> the KX3? I mean, why is it not a built-in feature of the KX3? First, I >> already own a KX3 with the KXFL3 filter so I am not asking this in order to >> choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, >> or troglodyte) in this sort of radio technology and still in learner mode. >> >> But, it seems to me that the KXFL3 roofing filter is almost required with a >> radio as nice as the KX3. Without it, as I understand the function, any >> crowded band interval like a pileup or close-in CW signals and such would >> render a KX3 (without the roofing filter) with less than the usual Elecraft >> stellar RX performance. >> >> My guess, and this is only a wild guess, is that maybe the option leads this >> space open to future improved roofing filters? Or, maybe even leave it open >> to a 3rd party market supplied filter (although, I think this filter is >> particularly different from other typical 3rd party filters). >> >> 73, phil, K7PEH > > __ > 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 phys...@mac.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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
Matching 0.1% capacitors? What kind of a design is this that requires such tolerances ? This make maintenance almost impossible. George, W6GF On Thursday, April 10, 2014 9:31 PM, Wayne Burdick wrote: Hi Phil, The roofing filter module (KXFL3) is expensive for us to manufacture because of the extremely tight tolerances on the capacitors (0.1% in some cases). They have to be matched by hand. We didn't want to pass this cost on to all KX3 users, since many of them don't require the roofing filters. Even without them, the KX3's receiver performance would fall into the top 6 or so radios as measured by Sherwood Engineering (http://www.sherweng.com/table.html). 73, Wayne N6KR On Apr 10, 2014, at 7:56 AM, Phil Hystad wrote: > I have a curiosity question. Why is the KXFL3 roofing filter an option on > the KX3? I mean, why is it not a built-in feature of the KX3? First, I > already own a KX3 with the KXFL3 filter so I am not asking this in order to > choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, > or troglodyte) in this sort of radio technology and still in learner mode. > > But, it seems to me that the KXFL3 roofing filter is almost required with a > radio as nice as the KX3. Without it, as I understand the function, any > crowded band interval like a pileup or close-in CW signals and such would > render a KX3 (without the roofing filter) with less than the usual Elecraft > stellar RX performance. > > My guess, and this is only a wild guess, is that maybe the option leads this > space open to future improved roofing filters? Or, maybe even leave it open > to a 3rd party market supplied filter (although, I think this filter is > particularly different from other typical 3rd party filters). > > 73, phil, K7PEH __ 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 georgefrit...@yahoo.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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
Hi George, Tight matching is required in the roofing filters because of their impact on the I and Q receive channels. This is not unique to Elecraft's application. By matching the gain and phase within the channels, we suppress image responses in hardware, simplifying the task of the DSP after the A-to-D converter. Fortunately the capacitors come on SMD reels and have fairly tight tolerance within batches. So we sort them the same way we do crystals. But yes, it would be difficult for a customer to repair their own KXFL3 board, should it involve the tight-tolerance parts. On the other hand, the board is extremely unlikely to fail, and it's a small removable module that can easily be replaced if necessary. I don't know of any cases of this yet. 73, Wayne N6KR On Apr 11, 2014, at 9:26 AM, george fritkin wrote: > Matching 0.1% capacitors? What kind of a design is this that requires such > tolerances ? This make maintenance almost impossible. > > George, W6GF __ 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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
Hi George, This is a precision matched phase I-Q filter. Its a key component of the KX3s excellent performance. No different than if you were ordering a precision crystal as we use in the K3. These parts are matched and selected here. We can supply matched sets if they ever are needed. We have yet to see one fail. (The chance of failure of these caps is miniscule.) 73, Eric elecraft.com On 4/11/2014 9:26 AM, george fritkin wrote: Matching 0.1% capacitors? What kind of a design is this that requires such tolerances ? This make maintenance almost impossible. George, W6GF On Thursday, April 10, 2014 9:31 PM, Wayne Burdick wrote: Hi Phil, The roofing filter module (KXFL3) is expensive for us to manufacture because of the extremely tight tolerances on the capacitors (0.1% in some cases). They have to be matched by hand. We didn't want to pass this cost on to all KX3 users, since many of them don't require the roofing filters. Even without them, the KX3's receiver performance would fall into the top 6 or so radios as measured by Sherwood Engineering (http://www.sherweng.com/table.html). 73, Wayne N6KR On Apr 10, 2014, at 7:56 AM, Phil Hystad wrote: I have a curiosity question. Why is the KXFL3 roofing filter an option on the KX3? I mean, why is it not a built-in feature of the KX3? First, I already own a KX3 with the KXFL3 filter so I am not asking this in order to choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, or troglodyte) in this sort of radio technology and still in learner mode. But, it seems to me that the KXFL3 roofing filter is almost required with a radio as nice as the KX3. Without it, as I understand the function, any crowded band interval like a pileup or close-in CW signals and such would render a KX3 (without the roofing filter) with less than the usual Elecraft stellar RX performance. My guess, and this is only a wild guess, is that maybe the option leads this space open to future improved roofing filters? Or, maybe even leave it open to a 3rd party market supplied filter (although, I think this filter is particularly different from other typical 3rd party filters). 73, phil, K7PEH __ 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 georgefrit...@yahoo.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 elist_c...@elecraft.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] Curious -- why is KXFL3 roofing filter an option on KX3 ?
If all of your operating is casual chatting, on uncrowded bands, with poor antennas, then the KXFL3 won't do much at all for you. Its primary function is to prevent DSP overload from very strong, adjacent signals and you won't experience that much if at all. If much of your operating is serious DXing or contesting on crowded bands with good antennas and active nearby neighbor stations, you will often encounter those strong, close-in signals and the KXFL3 will help a lot. Somewhere between those extremes of strength and crowding is the threshold. I got the filter even though it is often unnecessary. /Rick N6XI On Thu, Apr 10, 2014 at 7:56 AM, Phil Hystad wrote: > I have a curiosity question. Why is the KXFL3 roofing filter an option on > the KX3? I mean, why is it not a built-in feature of the KX3? First, I > already own a KX3 with the KXFL3 filter so I am not asking this in order to > choose to buy or not. Caveat: I am also a neophyte (philistine, ignorant, > or troglodyte) in this sort of radio technology and still in learner mode. > > But, it seems to me that the KXFL3 roofing filter is almost required with > a radio as nice as the KX3. Without it, as I understand the function, any > crowded band interval like a pileup or close-in CW signals and such would > render a KX3 (without the roofing filter) with less than the usual Elecraft > stellar RX performance. > > My guess, and this is only a wild guess, is that maybe the option leads > this space open to future improved roofing filters? Or, maybe even leave > it open to a 3rd party market supplied filter (although, I think this > filter is particularly different from other typical 3rd party filters). > > 73, phil, K7PEH > > > > __ > 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 rta...@gmail.com > -- Rick Tavan N6XI Truckee, CA __ 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
