[Elecraft] For Sale: New RRIGSET Remote Control for K3
Purchased from Elecraft, new in original box: both Control and Remote RRC's for setting up a complete K3 Remote System. Includes AC power supply. $400 prepaid shipping. PayPal OK. Contact off list: r...@aol.com 73, Dick- K9OM __ 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] KPA-1500 issues
I've experienced some of these same issues with my KPA-1500. In addition, sometimes the amp will switch to stand-by for no apparent reason, on 6 meters the AT won't tune a 1.7 to 1 SWR under 1.5 to 1, and one of the exhaust fans got a good deal noisier after about 25 hours of operation. My amp is back at Elecraft for service as I write. 73, Dick- K9OM On Mon, Nov 26, 2018 at 5:15 PM K9MA wrote: > This was my first serious contest effort with the new amplifier. It is > paired with a K3. It survived about 24 hours of operation, though it > faulted a few times, as described below. Clearly, the protection > circuitry did its job. Firmware is 1.87. > > A couple glitches: > > The power gain drifts downward as the transistors heat up. If I start > out at 1500 W, it will drift down to about 1100, without changing > frequency or SWR. Conversely, if I turn the drive up after the amp is > warm, and forget to turn it back down, the amp will fault when cold. > Since the amp is talking to the K3, couldn't some clever software fix this? > > Despite setting tune power to 40 W, the ATU sometimes just won't get the > SWR below 1.4:1 or so. This is with antennas below 2:1, and the ATU stop > set to 1.0. This happens on 40 meters, so it's probably not an ATU L/C > resolution limit. This 1.4:1 SWR is sometimes high enough to limit > output to well below 1500 W due to high drive power or high current. I > have not yet tried manually tuning the ATU to see if I can get the SWR > lower. > > Finally, after "training" the ATU across the band, I sometimes find that > the SWR has gone up significantly at some frequencies. I don't believe > this is due to changing antenna SWR. It seems more like the ATU has > "forgotten" the settings, or tried to retune itself without permission. > (HiSWR RETUNE OFF) > > Has anyone else seen similar issues? > > 73, > > Scott K9MA > > -- > Scott K9MA > > k...@sdellington.us __ 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] K3S: Trade FTdx5000MP Limited for K3S
Will trade my like new Yaesu FTdx-5000MP-Limited in excellent condition for K3S in similar condition. 73, Dick- K9OM __ 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] KPA1500 - Temp reading drops when under power
Have the same issue "temp drop under power" with Serail #167. 40m. is the worst by far. 73, Dick- K9OM In a message dated 8/19/2018 1:46:29 PM Central Standard Time, elecraft-requ...@mailman.qth.net writes: Subject: KPA1500 - temp reading drops 10C when under power Message-ID: <5b786b90.1c69fb81.199a1.c...@mx.google.com> I just checked mine on 40M and when on CW Temp is bouncing all over the place. Same into a dummy load as the antenna 300ft away. It also does it to a lesser extent on 80M and a little bounce on 17M and 10M. I suspect its in the amp and not related to common mode RF in the coax. Probably a cap in the right place would fix it. - Paul __ 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] KPA-1500 ATU not working well
I'm wondering if anyone else is having problems with their KPA-1500 ATU on 6-meters? My antenna is cut for 50.100 and has a 2.2:1 SWR at the 50.313 FT-8 frequency. The very best the ATU will do is to lower the SWR from 2.2:1 down to 2.0:1 which is almost no improvement. The 2.0 to 1 is with exciter power, when I switch the KPA-1500 to operate and transmit at 1,200 watts the SWR increases to aprx. 2.2 to 1 and the KPA-1500 will fault and trip off occassionally. Hoping there's a fix for this. I'm using the latest KPA-1500 firmware. Thanks, Dick- K9OM __ 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] Ed Re: KPA-1500 Question
Hi Ed, Thanks for all the RTTY Qso's! I read your post on the Elecraft reflector with interest. I have two different sets of Bose QC-15 noise canceling headphones, and when I use either one, and running on CW or RTTY, the fan noise from my KPA-1500 is loud and annoying when the Fan hits level 2, and extremely loud and extremely annoying when the Fan it hits level 3. It's hard for me to copy CW signals when the Fan hits level 3 and extremely difficult to receive when the Fan hits level 4. Many people have complained that the Yaesu Quadra has noisy fans when transmitting and running at full speed, the fan noise from my KPA-1500 is louder at Fan level 2 than my Quadra fans are when operating at full speed. Also, when the KPA-1500 fans are at Level 2 the noise bleeds through my noise canceling headphones louder than the fan & blower noise from my Alpha 8410. So either your noise canceling headphones work better than mine or your "field-test" KPA-1500 is a quieter than my production model. Please advise what type of noise canceling headphones your using? Thanks & 73, Dick- K9OM From: Ed W0YK Anecdotally,? I've operated several RTTY contests with a field-test KPA1500 and it just loafed along.? I didn't critically examine fan noise.? With noise-canceling headphones,? I wasn't aware of any fan noise.? Operationally, it felt like QRP, Wayne's target environment.? 73,Ed W0YK __ 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] KPA-1500 fan noise and headphone use
Regarding my previous post requesting that Elecraft look into ways to reduce the fan noise on the KPA-1500, I should have stated that I do own good headphones and use them every time I operate. I'm using Bose Noise Canceling model QC-15. If you know of a headphone that is comfortable for long contest weekends and reduces noise better than the QC-15 please let me know. Thanks & 73, Dick- K9OM __ 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] KPA-1500 fan speeds and fan noise
I think the KPA-1500 is a very nice amplifier and am happy to won one. That said, I'd like to see Elecraft find ways to reduce the fan noise, and I believe there are solutions, such as: in "Fan 1" mode: rather than have Fan 1 turn on at full speed with full noise, I'd much prefer to have all 3 fans turn on and run at 1/3 speed as the noise should be reduced while the air flow would be about the same. When the 3 similarly sized fans on my Yaesu Quadra run at slow speed while the amp is in stand-by or receive mode they are pretty quiet and only generate about the same amount of noise as many desktop computers, and when the Quadra is transmitting the fans go to high speed and produce about the same amount of noise as the KPA-1500 when it's running in the "Fan 2" position. I imagine Fan positions 3-4-5 are needed because the heat sink in the KPA-1500 is relatively small because the physical size of the amp is small? 73, Dick- K9OM __ 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] KPA-1500- occassional high SWR flashes
Noticing the same "occassional flashing of yellow and red in the LED SWR string" on KPA-1500 Serial #167 while driving the amp with a K3S. (actual SWR is 1.1:1) 73, Dick- K9OM In a message dated 5/19/2018 10:30:47 PM Central Standard Time, elecraft-requ...@mailman.qth.net writes: "...did notice an occasional flashing of yellow and red in the SWR led string. I watched my inline meter and it showed nothing during those bursts so something is going on there. (etc.)" This is common with the new amp. Elecraft is working on a firmware update to correct it -- hopefully. Just ignore flashing LEDs for now. 73, Roy K6XK __ 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] KPA-1500 request
Since the 4O3A Antenna Genius "in its original form" is not compatible with a K3, that's an excellent reason for Elecraft to offer a good Remote Antenna Switch as an accessory which is compatible. There are hams like me who work long hours and don't have time for homebrewing. That said, NS9I tells me that Green Heron offers Antenna Switches with interfaces which are compatible with the K3. Thank You to everyone who replied to my request for information. 73, Dick- K9OM In a message dated 3/29/2018 9:46:36 AM Eastern Standard Time, elecraft-requ...@mailman.qth.net writes: On Wed, Mar 28, 2018 at 7:36 PM, Jack Brindle wrote: > Anyone contemplating getting one of these for use with an Elecraft radio > should contact N6TV. He has circuits that can make the Antenna Genius > compatible with the K3?s BCD antenna selection signals. > in its original form the two are not directly compatible. > > - Jack, W6FB __ 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] KPA-1500 request
Since the KPA only has 2 Antenna jacks, I'd love to see Elecraft offer 1x8 and 2x8 Remote Antenna Switches with band data interface, if needed, so they arrive tested and ready to work with the K3. In the meantime, can anyone share which 1x8 or 2x8 Remote Antenna Switches and band data interface your using with your K3 and how time consuming it was to get the Antenna Switch configured? Thanks & 73, Dick- K9OM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3- wide variety of questions and topics
I really appreciate the wide variety of questions and topics that arise on this reflector about the K3 which includes problems encountered while using a K3. Recently, I learned some valuable information about how to setup my K3 so it receives FT8 signals better, and on how to setup my K3 transmitter so it keys faster. (turn the VOX off and use PTT) Though I'm mainly a contester, and then a DX'er, FT8 is quickly becoming a great tool for working DX. Since I'm mainly a contester, I'm looking forward to the day when I can operate a FT8 contest. But for now, I'm very happy to use FT8 on my K3 as another tool for working DX. Thank You Elecraft for allowing a wide variety of topics relating to the K3 on this Reflector. 73, Dick- K9OM In a message dated 3/4/2018 11:10:51 PM Eastern Standard Time, elecraft-requ...@mailman.qth.net writes: Phil, Questions about your K3 and any other Elecraft product are quite welcome. This reflector covers all Elecraft products as well as problems owners encounter when using them. FT8 is causing some confusion for owners new to digital modes, and that is why it is currently producing a lot of questions - we are trying to help. Stick around and you can glean a lot of information from this group, not only about your K3, but a lot more too. __ 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] K3S quit sending RTTY via AFSK
Hi Guys, I'm wondering if anyone is using your K3S to send RTTY via AFSK and you remember which Configuration settings are required to get the K3S to send AFSK with N1MM Logger+? My K3S got knocked around by UPS in shipment and I had to download the latest K3S firmware to resolve some other issues. Now the K3S will only transmit RTTY in DATA A mode and not AFSK A mode so I'm thinking perhaps a Config setting is wrong. Thanks, Dick- K9OM __ 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] For Sale: K3 Weighted Main Tuning Knob
Weighted Main Tuning knob for K3. 2 years old in like new condx. 73CNC design. $65 plus shipping. PayPal OK. Dick- K9OM. r...@aol.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 Noise Blanker
I really enjoy my K3s. That said, I agree with K9MA's post that "I have never found the K3 noise blanker to be effective". Though I would probably modify the word "never" to " very seldom". I realize that a great deal of work has gone into making the K3 NB all it can be but it needs improvement. I've found the NB on other radios to work a a great deal better reducing both impulse and even the "Electronic generated noise" mentioned by K9YC. There has to be a way to improve the K3 NB and I sincerely hope that more work will be done on this needed improvement. 73, Dick- K9OM On 9/3/2017 9:18 AM, K9MA wrote: > I have never found the K3 noise blanker to be effective. > BTW, the K3 noise blanker uses a filter with a bandwidth of about 100 kHz. The K3 NB is really TWO blankers, operating in two different IFs. Each can be tweaked for various kinds of noise from the menu system.? Access the menu by a Long Push of the NB button. It's important to understand that there are many kinds of noise. Noise blankers are most effective on IMPULSE NOISE, which is the result of something arcing, usually in the power system, but also electric fences and neon signs. Most of the residential noise we hear today is ELECTRONIC noise, generated by switch-mode power supplies and microprocessors.? Noise blankers must be very different to suppress this sort of noise. The menu tweaks provided by the K3, K3S, KX3, and KX2 are very critical to making the NB effective on the noise you're experiencing. One size does NOT fit all. 73, Jim K9YC __ 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] K3S USB audio output needs to be adjustable in Menu
Hello Elecraft, When feeding the audio from the K3S USB port to the CPU, the K3S audio level is extremely high and way too hot for good performance on many digital modes. Example, even with my CPU's sound card set at the lowest possible level of "01" my K3S is hitting the JT-65 software with a super strong signal that is much higher than the software wants to see and performance is degraded. The same is true when operating RTTY using MMTTY or 2Tone software. The USB audio output on the K3S needs to be adjustable in the K3S Menu as it was on the K3 Serial port. I wrote to you a few months ago about this without a positive reply. Please address this serious issue. Thank you- Richard Van Zandt- K9OM In a message dated 6/2/2017 7:28:48 P.M. Central Daylight Time, elecraft-requ...@mailman.qth.net writes: If you are using Line Out with a fixed gain setting to feed audio to WSJT-X, adjusting the AF control will not do anything. What I do is leave my RF gain control at its normal position (around 3 o'clock) and use the slider at the lower left in the WSJT-X window to compensate for gain variations. 73, Rich VE3KI W3FPR wrote: > Bret, > > You may have better luck with running the RF Gain full and adjusting > with the AF gain. That way the RX AGC will smooth out variations in the > signal level. > > 73, > Don W3FPR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 slightly off frequency
I have a K3 kit that's been back to the factory for repair and alignment, and a K3S that was factory made and aligned. Regardless which one I'm using, most of the time when I get "spotted" by RBN, my frequency is listed as being 100hz higher than listed on the K3's front panel digital readout. This has often made me wonder if both of my K3's are slightly off frequency. Could it be that many/most K3's are "slightly off frequency"? 73, Dick- K9OM In a message dated 4/9/2017 1:08:53 P.M. Eastern Daylight Time, elecraft-requ...@mailman.qth.net writes: A few of us in Fremont, CA have a weekly 10 meter net. I have a friend with a K3 who always sounds off frequency. When I use my K3, I've been told that I am off frequency. There are a couple of KX3 users who don't seem to have a problem. When I use my Kenwood TS-590 I seem to be on frequency. Is the K3 known, in general, for being slightly off frequency?? Thanks, Steve ?KG6HJU __ 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] Amplifier thought: antenna tuner seldom needed with LDMOS amp
As was posted on the Amps reflector a few months back: > The LDMOS devices are designed to tolerate 65:1 SWR, 3:1 probably > wouldn't be a problem so where is the need for a tuner? Most ham antennas don't exceed 3 to 1 SWR even on the band edges. New amps that are constructed with LDMOS finals should be able to handle nearly all antennas without a tuner. Operating a legal limit amp into an antenna with an SWR greater than 3 to 1 should be avoided for many reasons, such as: poor radiation efficiency, harmonics, RF in the shack, RFI, etc. 73, Dick- K9OM In a message dated 4/1/2017 8:48:28 P.M. Eastern Daylight Time, elecraft-requ...@mailman.qth.net writes: Date: Sat, 1 Apr 2017 12:03:01 -0500 From: K9MA To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Amplifier Thoughts Message-ID: Content-Type: text/plain; charset=windows-1252; format=flowed On 4/1/2017 09:22, John Perlick wrote: > In the case of a solid state amp, the output is matched to 50 Ohms or so. Period. So any mismatch means that RF is reflected back into the ampwhere it is converted into heat.Depending on your SWR, that could be substantial! So let's say 3:1. Then 25% of the power is reflected. Note: at 10:1 you reflect 67% of the power so that means 500 W reaches your antenna and 1000W is dissipated in the Drain-Source junctions of your expensive RF transistors! Clearly, a practical solid state amplifier capable of tolerating, say, a 3:1 SWR needs an autotuner. (Very few of us have the luxury of perfectly matched antennas across all bands.) That said, the autotuner should permit maximum flexibility, including multiple settings for the same band. There should also be an easy way to change settings, so the amplifier can be easily integrated into the station control system. 73, Scott K9MA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3- padded carrying case
Hi Guys, Please advise what's currently available in padded equipment or carrying cases or the K3? I'd like to the size to meet FAA "carry on" requirements. (9x14x22") Thanks! Dick- K9OM __ 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] Mike Re: Elecraft KPA-1500
Mike, About 10 days ago, Eric from Elecraft posted a message on the Elecraft Forum asking for people "to submit a list of features we would like on a KPA-1500". It's time to submit a list! 73, Dick- K9OM In a message dated 3/23/2017 8:01:26 P.M. Eastern Daylight Time, elecraft-requ...@mailman.qth.net writes: Message: 26 Date: Thu, 23 Mar 2017 17:31:50 -0600 From: W0MU Mike Fatchett To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA-1500 features Message-ID: <96fb74cc-acc8-688d-38e4-98ec78386...@w0mu.com> Content-Type: text/plain; charset=windows-1252; format=flowed Is Elecraft seriously considering a KPA-1500 or KPA-2K? On 3/20/2017 12:53 PM, Clay Autery wrote: > Yes... to everything Dick said. > > __ > Clay Autery, KY5G > > On 3/20/2017 11:49 AM, Dick via Elecraft wrote: >> >> I'd like to see the KPA-1500 use dual 1kw LDMOS transistors as they are >> relatively inexpensive and can handle high reflected power. An antenna tuner >> shouldn't be needed unless the SWR exceeds 3 to 1. I'd like the KPA-1500 >> designed for 2kw so it will easily make 1,500 watts in "run" mode all >> weekend long on all modes, including RTTY. Too many of today's "legal power >> amps" often won't make legal power. A quiet Amp is important, use 4" or >> larger cooling fans and not tiny 2" fans like many solid-state amps use as >> they often need to run at warp speed and then make a tremendous amount of >> noise. I'd like two radio inputs and six antenna outputs, and to be able to >> adjust the brightness of all front panel light from bright to very dim. The >> KAT-500 front panel lights cannot be turned down low enough for me. The >> KPA-500 is small and excellent for DXpeditions, build the KPA-1500 as a >> robust legal limit amp with large heat sinks that will run cool, operate >> quietly, and easily make 1,500 watts on all bands 160-6m and I'll be sure to buy >> one. >> >> 73, >> Dick- K9OM __ 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] KPA-1500 features
I'd like to see the KPA-1500 use dual 1kw LDMOS transistors as they are relatively inexpensive and can handle high reflected power. An antenna tuner shouldn't be needed unless the SWR exceeds 3 to 1. I'd like the KPA-1500 designed for 2kw so it will easily make 1,500 watts in "run" mode all weekend long on all modes, including RTTY. Too many of today's "legal power amps" often won't make legal power. A quiet Amp is important, use 4" or larger cooling fans and not tiny 2" fans like many solid-state amps use as they often need to run at warp speed and then make a tremendous amount of noise. I'd like two radio inputs and six antenna outputs, and to be able to adjust the brightness of all front panel light from bright to very dim. The KAT-500 front panel lights cannot be turned down low enough for me. The KPA-500 is small and excellent for DXpeditions, build the KPA-1500 as a robust legal limit amp with large heat sinks that will run cool, operate quietly, and easily make 1,500 watts on all bands 160-6m and I'll be sure to buy one. 73, Dick- K9OM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3- Separate AGC settings needed for: CW, SSB, RTTY
Ed's message is another confirmation on why it would be really great if Elecraft would modify the K3 software so the MENU would allow us to select separate AGC settings for: CW, SSB, and RTTY. I realize this may be a first, but Elecraft is good at leading the pack! 73, Dick- K9OM In a message dated 3/8/2017 3:54:47 P.M. Eastern Standard Time, elecraft-requ...@mailman.qth.net writes: Below is a thread from 7 March 2016 about AGC usage with RTTY decoders. David Wicks, G3YYD, is the author of 2Tone and Kok Chen, W7AY, is the author of CocoaModem. Anecdotally, my experience after 250,000+ RTTY QSOs over the past 15 years concurs that minimizing AGC action supports best decoder performance. If my ears, or widely varying signal levels, can't tolerate AGC Off, then I use AGC Slow, SLP=0 and THR=14 or higher. Note also the comments about receiver IF bandwidth of 500 Hz except in extreme cases. Even in big RTTY pileups such as I encounter sometimes in DX locations, Again, I've anecdotally found that 500 Hz decodes better most of the time. I seldom go lower. This also implies turning off the K3 Dual-Tone filter. Both of these points (no, or minimal, AGC and moderate IF BW) are not intuitive, especially for an experienced CW operator. Ed W0YK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 vs Icom 7300 and 2khz spacing tests
Indeed, I'd like to see more receiver testing done on receivers at 500hz spacing. 73, Dick- K9OM In a message dated 2/27/2017 9:57:30 P.M. Eastern Standard Time, elecraft-requ...@mailman.qth.net writes: Keep in mind that the Sherwood rankings are based on 3rd Order Dynamic Range at 2 Khz spacing ? not on any other factor, and not on some general measure of a radio?s ?goodness?. While it isn?t necessarily unimportant even for casual rag chewing, it may not be the most important consideration. __ 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] K3S Band data 1 connection to the Yaesu VL1000
Hi Tom, Your initial thought is correct: "the K3VL1K1 is not wired correctly and will not key the amp". I had the exact same issue and spoke to the fellow who made the cable for Array Solutions, and he said he purposely didn't wire the cable to key the amp. He gave me a reason why but it made no sense to me. Fact is, I purchased the same type of K3S to Quadra cable for another fellow and it does key the Quadra as needed. I think we should ask Array Solutions to change the cable construction so it keys the Quadra. 73, Dick- K9OM Date: Wed, 30 Nov 2016 17:48:38 -0500 From: Thomas Donohue To: Elecraft@mailman.qth.net Subject: [Elecraft] K3S Band data 1 connection to the Yaesu VL1000 query Message-ID: <8447a436-470c-4662-93ec-960838347...@gmail.com> Content-Type: text/plain; charset=utf-8 Hi to all: This subject has been posted before and I found the answer on the Elecraft historical threads web page. In any event I tried the recommended solution but have not been able to get the K3S to key the VL1000. Specifically, I?m using a Band data one cable put together by Array Solutions (designator K3VL1K1) to connect the ACC output on the K3S to the Band data 1 input on the VL1000. With the VL1000 turned off and the power supply turned on, I can use the K3S on all bands FB; When I turn the VL1000 on and select input 1, I can use the K3S on all bands, with auto band switching by the VL1000. However, when I press the operate button on the VL1000, the unit will not key on any band, but the auto band switching function on the VL1000 continues to work. My initial thought is that the K3VL1K1 is not wired correctly and will not key the amp. But, when I checked the wiring it appeared to be wired correctly. So my query is (1)Is the K3VL1K1 the correct cable for what I?m trying to do (i.e. auto band switch and key the amplifier?, and if it is the correct cable is there a config menu setting that needs to be implemented (i?ve checked and haven?t found any)?, or is there something I?m missing or not doing. Any thoughts or advice will be appreciated. Best 73, Tom/W1QU __ 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] K3S USB driver problem
My K3S with Elecraft USB cable going the radio to computer worked great on my old Windows 7 64-bit computer. Now I'm trying to use the same radio and same USB cable with another Windows 7 64-bit computer and cannot get it to work as I'm having problems getting the driver installed. Some related thoughts: 1) This Windows 7 64-bit computer cannot auotmatically find a Driver for the USB cable. I'm, quite sure my old W.7 computer installed the driver automatically without me downloading it manually. 2) Since the new computer cannot find the driver automatically, from the Elecraft website, I downloaded the Driver file: "CDM v2.12.24 WHQL Certified" and then unzipped it to the Documents folder. (there are 8 files within that folder) Using Device Manager, I try to install the new Driver, but regardless where I place the zipped or unzipped "CDM v2.12.24 WHQL Certified" driver file, Device Manager reports that it "cannot find the driver". Please advise what I'm doing wrong? Such as, it there on particular file I need to select manually? Or perhaps this CDM v2.12.24 driver file needs to be placed in a particular folder? Thanks & 73, Dick- K9OM __ 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] KPA-1500 needed
I agree full heartedly with Greg. Please put me on the list for a KPA1500 too! 73, Dick- K9OM In a message dated 7/31/2016 7:15:50 P.M. Central Daylight Time, elecraft-requ...@mailman.qth.net writes: It's amazing how many people offer an opinion on what the market would be for an Elecraft 1500 watt amplifier. People just know it wouldn't be successful without a clue who might or might not really be interested. They're right...the QRP'ers would not be interested, for one, would be very interested. People who have amplifiers sitting on shelves collecting dust would not be interested. So who would be interested -- contesters and DX'ers. I own a KPA500 and it is very nice; the integration with the K3 makes it a pleasure to use...but I want the capability to run full legal limit. I own several full legal limit amps but would gladly get rid of one or more for an Elecraft amp. At my age and being retired, I care more about value, engineering design, and service than I do about price. There are lots of people who spend $6 - $14K on a radio...why not an amplifier? The majority of serious contesters and DX'ers own a K3. If a KPA1500 had the same features as the KPA500 then it would be compatible with the K3, remember the drive required on each band, put the K3 back at 100 watts when in standby, be upgradeable through Elecraft's utilities, have Elecraft's service commitment, would match the K-line, would be fully self-protected, and it would be made and serviced in the USA. Elecraft has already dealt with the requirements for an amp to be compatible with other rigs than the K3 so that would not be an issue with the 1500. Contesters especially would appreciate convenience with the instant band switching with no need to touch drive controls or worry about antenna selection. I'll offer my opinion that a lot of people who already own a 1500 watt amplifier would go ahead and purchase an Elecraft amplifier for all the reasons mentioned. Alphas used to be the cat's meow but the products and service they have now don't measure up to what Dick Ehrhorn used to offer. I wouldn't discourage Eric/Wayne from considering a KPA1500. I hope they do it. Put me on the list to get one if/when they do. 73, Greg-N4CC __ 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] Fw: KRC2 sold
The KRC2 I listed earlier today has been sold. Dick, K8ZTT __ 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] KRC2 For Sale
I have a KRC2 band decoder and control kit for sale; asking $80 plus shipping (USA). Am selling the KRC2 because I have 12 mono band antennas (6M - 160M plus 75M NVIS) and the KRC2 will only control 10 (10M - 160M). Doing a bit of research (actually blind luck when perusing the Array Solutions web site) I found their Bandmaster III will control 12 antennas, and I picked one up at the Array Solutions booth in Dayton last week. Though the KRC2 will work with several other manufacture's radios, I have only used it with a K3 (and now a K3S). I have never had any problems or issues with it; I am the original owner, and it has always been in a smoke free environment. For the K3/K3S (and I think all the Elecraft radios), control is best asserted by using the AuxBus; this requires one wire from the KRC2 connected to pin 2 on the AuxIO connector on the K3/K3S. If interested, please fire off an email to me at either richarddw1...@yahoo.com or k8...@yahoo.com; or feel free to call me on the land line (am an ARRL DXCC card checker, and my phone number can be found on the ARRL webpage). Dick, K8ZTT __ 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] K3S Build - What have I forgotten
Andrew, Make sure you have the appropriate mic connector turned on (rear or front). Set mode to SSB< TAP (not hold) the Menu button, then turn VFO B knob to mic setting, then set the right mic input (or line) with the VFO A knob. Also, depending on your mic, you might need to turn on the mic bias using the "2" (REV) pad by tapping it on or off. Dick, K8ZTT On Sat, Apr 30, 2016 at 5:09 PM, Andrew Hebden wrote: > Hi, > I have completed my build following the manual and everything seems to work > fine until I started to try and set it up for SSB. I can get full output > using the two tone test but nothing through the microphone. I also tried a > another microphone plugged in to the rear mic socket. Still nothing. > Any suggestions? > > Andrew > G8BYB > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > __ > 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 estept...@gmail.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 richarddw1...@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] Rerouting the KRX3 AUX Input from the Rear BNC to the KAT3
Don, I have my sub receiver connected to the AUX input, and it still works just fine with diversity receive. The way you do is connect your receive only antenna to the RX in BNC on the back of the K3, then run a short piece of coax with male BNC connectors on each in between the RX OUT and the AUX input. Not sure why this method has not been mentioned in the manual. I have being doing this since I purchased my original K3. I use either Beverages, or the Hi Z 8 now; but am in the process of erecting a SAL 30 fro Array Solutions. That will give me three different choices for receive antennas. Dick, K8ZTT From: Don Wilhelm To: Sverre Holm (LA3ZA) ; elecraft@mailman.qth.net Sent: Friday, April 1, 2016 12:23 PM Subject: Re: [Elecraft] Rerouting the KRX3 AUX Input from the Rear BNC to the KAT3 Sverre, That task can be accomplished by removing only the top cover. The angled TMP connector on the subRX is a little difficult to reach without tilting the back of the subRX up a bit, but it can be done. 73, Don W3FPR On 4/1/2016 1:56 PM, Sverre Holm (LA3ZA) wrote: > When I built my K3 some years ago I routed the second receiver's AUX antenna > input to the rear panel BNC connector. But now I have changed my mind and > want to route it through the KAT3 instead, in order to try diversity > reception. > > How complex is this to accomplish? I know I need to plug in another 30 cm > tmp cable to the KRX3 board than the one I am using now. __ 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 richarddw1...@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
[Elecraft] K3: roofing filter configuration settings
A question regarding roofing filter "configuration bandwidth" settings on the K3: The factory default roofing filter "configuration bandwidth" setting is to set the 250hz filter at a setting of "250". Therefore, the 250hz roofing filter will engage at the same time as the 250hz DSP filter. However, since the 250hz roofing filter has an actual BW6 of 370hz, aren't there times when it would be more beneficial to have the "configuration bandwidth" of the 250hz roofing filter set to 350 or 400? I'm thinking this may be especially true when operating RTTY since the average RTTY bandwidth is aprx. 370hz. Perhaps there are times when this would be beneficial when operating other modes as well? Likewise, the 400hz roofer has a BW6 of 450hz, so perhaps for certain modes a "configuration bandwidth" setting of 450 rather than 400 could be beneficial as well? If anyone is wondering where I'm getting the term "configuration bandwidth" from, it's a configuration heading on the K3 Utility programs filter configuration page. Thanks & 73, Dick- K9OM __ 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] P3: How do you save a configuration setting?
Please advise how to save the "Set Display Brightness" setting. According the Manual you simply select the brightness setting you want by rotating the Select dial, tap the Select knob to exit the function, and Tap Menu again to exit the Menu. But that sequence doesn't save the Brightness setting as every time the P3 powers up the brightness level is back to the original factory default setting. Thanks & 73, Dick- K9OM __ 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] P3: how to save configuration setting?
Please advise how to save the "Set Display Brightness" setting. According the Manual you simply select the brightness setting you want by rotating the Select dial, tap the Select knob to exit the function, and Tap Menu again to exit the Menu. But that sequence doesn't save the Brightness setting as every time the P3 powers up the brightness level is back to the original factory default setting. Thanks & 73, Dick- K9OM __ 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] K3S: CW keying via USB question
Using only the USB Port cable to the CPU, can CW be transmitted on the K3S using N1MM Logger+ or DX-Lab software without the use of a WinKey? Thanks! Dick- K9OM __ 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] K3S - AFSK problem Update- problem resolved
K3S AFSK problem resolved. Mike was right, I had a config problem with Logger+. I had triple checked all settings before posting the message asking for help... and I still messed up on a setting! K3S working FB on AFSK now! 73, Dick- K9OM From: mike.flow...@gmail.com To: r...@aol.com Sent: 10/16/2015 10:29:27 P.M. Central Daylight Time Subj: Re: [Elecraft] K3S - AFSK problem, need help! Hi Dick, Check you N1MM Logger+ configuration. It may be asserting FSK to your K3S when DATA A is wanted for AFSK. 73 de Mike, K6MKF - President, NCDXC On Fri, Oct 16, 2015 at 8:25 PM, Dick via Elecraft <_elecr...@mailman.qth.net_ (mailto:elecraft@mailman.qth.net) > wrote: I'm trying my K3S on RTTY for the first time in the JARTS Contest this weekend, and I'm having problems. I'm running it in AFSK mode, using the K3S in and out audio jacks to the CPU. Also, I'm using the K3S serial port to the CPU. When I QSY, the K3S often switches from AFSK to FSK all by itself, and then I have to manually select DATA MD and reset it to AFSK. (must have reset it 25 times in the past 3 hours) I must have something set wrong in the configuration as the MIC control on the K3S doesn't change the AFSK audio level either, I have to set the level via the CPU's audio mixer. My software is N1MM Logger+. (latest revision) Please advise what I'm doing wrong. Thanks & 73, Dick- K9OM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:_elecr...@mailman.qth.net_ (mailto:Elecraft@mailman.qth.net) This list hosted by: _http://www.qsl.net_ (http://www.qsl.net/) Please help support this email list: http://www.qsl.net/donate.html Message delivered to _mike.flowers@gmail.com_ (mailto:mike.flow...@gmail.com) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3S - AFSK problem, need help!
I'm trying my K3S on RTTY for the first time in the JARTS Contest this weekend, and I'm having problems. I'm running it in AFSK mode, using the K3S in and out audio jacks to the CPU. Also, I'm using the K3S serial port to the CPU. When I QSY, the K3S often switches from AFSK to FSK all by itself, and then I have to manually select DATA MD and reset it to AFSK. (must have reset it 25 times in the past 3 hours) I must have something set wrong in the configuration as the MIC control on the K3S doesn't change the AFSK audio level either, I have to set the level via the CPU's audio mixer. My software is N1MM Logger+. (latest revision) Please advise what I'm doing wrong. Thanks & 73, Dick- K9OM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3: Actual bandwidth of Inrad 500hz 8-pole filter?
Would anyone know the actual bandwidth of the Inrad Model 728 500hz 8-pole filter? Such as, the 250hz 8-pole has an actual bandwidth of 370hz, and the 400hz 8-pole filter has an actual bandwidth of 450hz. (no graph is shown for the Model 728 like it is for the others) Thanks & 73, Dick- K9OM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3: Swap your 2100hz SSB filter for my 1800hz SSB filter?
I have a Elecraft 1800hz, Model 711-L, SSB filter and would like to trade it for a Elecraft 2100hz SSB filter. Please advise if anyone would like to make the trade. 73, Dick- K9OM __ 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] K3S - have initial shipments begun?
Wondering if initial shipments of the new K3S have begun? If not, please advise the target date? 73, Dick- K9OM __ 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] Running the KX3 and KXPA100 Off Battery (Phil Hystad)
Phil, Operating portable with a KX-3 and KXPA-100 running 50W I typically observe 6-8 hours of useful life per charge using this jumpstarter battery: http://www.amazon.com/gp/product/B00KBINF7G/ref=oh_aui_detailpage_o05_s01?ie=UTF8&psc=1 They advertise that this is 18AH, but they do not advertise the low-voltage point of their measurement, so take that for what it is worth when you make your comparison. -DwightKF5WOE __ 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] Hi Re: K3 Wanted
Hi- I have two wonderful K3's and only need one. Let me know if you're still in the market and I'll forward the information. 73, Dick Van Zandt- K9OM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3: Sherwood Receiver Test Data question
Please advise if I am reading the new Sherwood receiver data correctly: 1) it shows a nice 6-8dB improvement in 3rd order dynamic range after adding the new synthesizer? 2) it shows that the K3's sensitivity has been greatly reduced from the original 0.33 & 0.19 to 0.8 & 0.5 after the addition of the new synthesizer? If this is true, this would be bad news for weak signal 6 & 10-m. reception. 73, Dick- K9OM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3: best roofing filter on RTTY
Hi Guys, I'd appreciate your thoughts on the best roofing filter: 250hz vs. 400hz, for RTTY contest conditions. While I really like the K3 on RTTY, I believe improvement can be made to my K3 RTTY reception. Some contesters have told me that they use the 250hz roofing filter exclusively when operating RTTY contests. Since the actual bandwidth of the 250hz roffer filter is close to 370hz, and RTTY signals are typically about 370hz wide, then the 250hz roofer along with a 400 or 500hz DSP setting should be close to ideal when maximum selectivity is needed. However, on both of my K3's, when I switch from the 400hz roofer to the 250hz roofer, the RTTY signal is decoded a lot less often, about 25% less often. It doesn't seem like the 400hz roofer should decode 25% more often than the 250hz roofer. (but perhaps that's normal?) Perhaps there is a receiver setting change I can make to the K3 that will improve RTTY decoding when using the 250hz roofer? I've tried various shift settings when the 250hz roofer is engaged and sometimes it improves RTTY reception, but not consistantly. Perhaps there's a setting change I can make to MMTTY? By the way, I'm using both MMTTY and 2Tone software's for decoding RTTY, with basically the same results when the 250hz roofer is engaged. Thanks in advance for your thoughts. 73, Dick- K9OM __ 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
