It is absolutely true that cw is fun with a 500hz roofing filter. Roofing filter passive imd has been observed with all down conversion radios. Hi phil, the roofing filter module kxfl3 is expensive for us to manufacture because of the extremely tight tolerances on the capacitors 0. Kenwood ts590sg so3 tcxo high stability oscillator installation and frequency calibration duration. Sized to pass the widest mode of operation improve dr3 begins with. The only thing that elecraft didnt supply was lots of sunspots. The data generated by the program for each crystal filter, or dsp filter. Ic781 roofing filter relocation results bob lanning w6opo february 8, 2008 in october 2007 i bought and installed inrads just announced roofing filter for the ic781. Page 60 if the menu entry name is without the, then the k3 has not correctly k i o 3 detected the kio3b module, and the usb and rs232 ports will not function.
Since the kx3 is a softwaredefinedradio sdr, youll be able to extend its. Even the excellent ssb roofing filter can be topped. I love qrp and this along with my other two kx3s, one with 2mtrs, are my loves. The options i ordered were the kxpd3 cw paddle kxfl3 roofing filter, kxbc3 nimh battery charger and finally the kxat3 internal antenna tuner. When i ran a few tests on the kx3, i found that calibration at fairly frequent intervals was required to maintain acceptable oppositesideband rejection. How helpful do you think the optional roofing filters will be to me. Basically, a roofing filter is simply the first if filter in a radio. Sweep through a strong carrier on one side, then cross zero beat and absolutely nothing is heard on the opposite side. The management works very hard to make sure the community is running the best software.
Elecraft kx3 roofing filter calibration found someone interested in a trade for my 746pro207h for a kx3 with the tuner, and loads of extras. Back at home after the activation, i reran the kx3 opposite sideband null calibration procedure as outlined in the kxfl3 roofing filter instructions, using an elecraft xg1 signal generator instead of the kx3s internal 16mhz oscillator. The goal of a roofing filter is to limit the passband of the first intermediate frequency if stage. Discussion in mobile radio systems started by pg8m, dec 18, 2017. With the kxfl3 installed and enabled, the kx3 will automatically use its narrow filters, fl2 and fl3, whenever possible. Icom first if stage roofing filters fl431 free shipping on. Ive had a number of stateside contacts, and i do have yet to get some actual dx. Supposedly there is an automated tool that uses cat on the xg3 and the kx3 to fully automate the procedure. You can now help support worldwidedx when you shop on amazon at no additional cost to you. We didnt want to pass this cost on to all kx3 users, since many of them dont require the roofing filters. It is usually placed as clos e to the first mixer as possible in order to be effective. Roofing filters automatically track dsp filter settings. The kx1 micro manual is intended to be a handy reference to the elecraft kx1 owners manual.
The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. For example, if an elecraft 5pole, 200hz filter were labeled 0. To find a kx matrikx filter, select the general size of the kx water filter you are looking for. Designed for frequent use, the filter elements are mounted in a standard cuvette sized holder which protects the filter element for damage due to handling. Filter solutions is a windows based software program for the synthesis and analysis of electronic filter circuits. Roofing filter is the current buzzword in high end radios. If you need indepth information, visit their kx3 web site. The kit assembly as i said earlier did have some hiccups. Hdsdr if panoramic display with conventional receiver or. Roofing filters, transmitted bw and receiver performance.
Curious why is kxfl3 roofing filter an option on kx3. Kxfl3 filter option kxfl3 roofing dualbandwidth filter installation and calibration instructions. Even without them, the kx3 s receiver performance would fall into the top 6 or so. Found someone interested in a trade for my 746pro207h for a kx3 with the tuner, and loads of extras. Pathetic, really, but due to new job, lots of travel, etc. A few words about intermodulation dynamic range and roofing filters. As i installed the optional roofing filter in my kx3 elecraft suggests that you do a rxsbnl calibration of the phasegain of the filters fl1 fl2 and fl3 to suppress the unwanted sideband. Also, any other kx3 menu settings that i may have missed. You can see the roofing filters towards the left of centre.
Kx3 high performance portable transceiver manuals elecraft. By changing the first if filter width according to the operating mode, the desired signal is protected from adjacent inband signals at all stages of the receiver. A simple crystalcontrolled sdr like the softrock lite may be connected to the if of a conventional receiver or transceiver to give a panoramic sdr display and all the other features of sdr. Simply follow this shop on amazon link first and a portion of any purchase is sent to worldwidedx to help with site costs. As i understand the manual, the roofing filters should kick in automatically as i narrow the pbt. With a transceiver you may click on a signal and transmit. All the roofing filters from tentec, elecraft, or sherwood do the job. Jeff, be sure the filter module is enabled in the menu and then powerdown the kx3 and power it back on.
The portable kx3 going for the summit with the kx3 and kx32m4m. The k3 uses crystal filters at the 8 mhz 1st if, the kx3 roofing filters work at the 2nd if, but should still be quite effective. Elecraft kx3 kxfl3 roofing dualbandwidth filter introduction. The plot below shows the sweep frequency response of the rf board in an ic775 radio. Even then sometimes while transmitting the kx3 stops transmitting and digipan locks up.
The roofing filters are bypassed indicated by fl1 in am, fm, and. Amateur radio station wd8rif elecraft kx3 william eric mcfadden. If you install a kxfl3 s p o t increase sidetone volume. The spectrum display at the left, is taken from the 2nd if and shows what the filter shape of the original rigs filter looks like.
Strong signals with 30 or 40db over s9 just disappear and do not affect the weak signal at all. Up to 10 watts on 80 15 metres, 8 watts on 12 and 10 metres. The ic775 roofing filter mod consists of a 6 pole, 5 khz wide filter followed by a high dynamic range, feedback amplifier. The icom ic756proiii roofing filter mod consists of a 6pole, 4 to 5 khz wide filter followed by a high dynamic range feedback amplifier. While testing the k3s new synthesizer, six roofing filters were tested for their effect on dynamic range. The ic7200 is not waterproof, but it is splash proof what ever that means. The amplifier provides enough gain to overcome the filter insertion loss. Compared to a 15 khz roofing filter, a 500 hz cw roofing filters will pass about 3% of those signals on to the later stages of the radio. Each filter is guaranteed to meet or surpass the original equipment manufacture specifications. The yaesu 3 khz filter measures about 7 khz wide at 6db. First filter, as close to the antenna as possible 1 st if typical why. Overview newport calibration filters are an essential accessory for spectrophotometer users.
Photo roofing filter calibration in the album elecraft kx3. Zetron desktop microphone manual 0259589f software license the zetron. The roofing filter i found to have some ridges on both the top and bottom of the pc board. Is this one size does all roofing filter the one alluded to at the beginning of the k3 campaign that would be available at some point down the line. Centre tuning indicator for cw and data modes, with autospot. In this configuration it easily can be heard that the 500hz. Additionally i am also a published writer, actor, s.
Youd think that could easilty fit into the lowepro case. Despite its small size, it covers all amateur bands from 1606 meters, operates in all modes, and has dspbased features usually found only on larger radios. The amplifier provides enough gain to override the filter insertion loss plus a few db. I also tried the cw roofing filter without the narrow kvg filter. Some variation is expected, but there was significant variation with the 5pole filters. Icom first if stage roofing filters fl431 free shipping. The kx fi calibration kit allows the user to easily choose from seven pre programmed fuel and ignition maps the parameters are adjustable to suit specific tracks, surfaces and riding styles the kx fi calibration kit contains kx racing software, an ecu controller, mounting brackets and damper, harness and usb cable in addition to the kit, a pc is required and you can also use an. Available in 3 khz and 6 khz, the 3khz first if filters are especially effective in the cw and ssb modes. No test equipment is required to calibrate the filter although a signal generator may be used, if available. From a personal read that as mobile standpoint, the roofing filter needs to be closer to 3 khz, and perhaps as low as 2. Our usa made filters and parts use only the highest quality material available in the market and are manufactured to the highest standards. K3 filter tools was developed to allow k3 owners to characterize the crystal roofing filters installed in their radios, as well as the adjustable dsp filters.
Feb 05, 2016 kenwood ts590sg so3 tcxo high stability oscillator installation and frequency calibration duration. Strong signals outside the channel which may cause overloading and distortion by the following amplifier stages and mixers are blocked. The plot below shows the sweep frequency response of the front end and first if. Improve your icom transceiver front end selectivity with optional first if stage roofing filters. Its only a few weeks longer until i can afford to buy the assembled kx3 with tuner and roofing filter. All that is needed is a clean, stable signal source that can be injected into the k3s antenna port. Available options and accessories allow the kx3 to be tailored to your needs, including the px3 panadapter, kxpa100. It still seems to work, but its more of a beat cancel than a notch filter wrapup. I use the kxpa100 for the kx2kx3s, and when condx are really rotten, i use the k3s with the kpa1500 and hang out 16040. Or, browse through the list of kx filters and charts to find the filter best suited for your water filtration needs. Elecraft kx3 kxfl3 roofing dualbandwidth filter pdf free. Actually, at least as i understand it, the kx3 is direct conversion, to the kx3 roofing filter option is at the first if as well. It also has a roofing filter, all mode operation, and 160 through 6 meter coverage a 2 meter module is coming. Hdsdr and rig are connected by cat so that either may be tuned, they both move together.
Since the kx3 is a softwaredefinedradio sdr, youll be able to extend its capabilities using computer. The dsp can take any of the filters down to around 50hz in software. Even though the kx3 has an excellent receiver, it couldnt compete with the possible options the k3 has to offer and i honestly didnt want a mess of cables on my desk in plain sight. Contrary to some popular press, the ic7200 does indeed have a 6 khz roofing filter. A roofing filter is a type of filter used in a hf radio receiver. Protects following circuits from nonlinear operation due to strong out of band signals what. Kx matrikx water filters and kx industries replacement. Photo roofing filter calibration in the album elecraft. It is usually found after the first receiver mixer.
Page 60 if the menu entry name is without the, then the k3 has not correctly k i o 3 detected the kio3b module. All that is needed is a clean, stable signal source that. I would appreciate getting information from anyone with the same setup and what settings are used for the kx3s af and mic gain as well as settings for the signalink. Kx matrikx 01250125975 carbon block water filter and voc. I purchased the kx3 as a portable rig to use for things like summits on the air sota, parks on the air pota, camping and other portable operations. I would appreciate getting information from anyone with the same setup and what settings are used for the kx3 s af and mic gain as well as settings for the signalink. Null calibration procedure as outlined in the kxfl3 roofing filter instructions.
Back at home after the activation, i reran the kx3 opposite sideband null calibration procedure as outlined in the kxfl3 roofing filter instructions, using an elecraft xg1 signal generator instead of the kx3 s internal 16mhz oscillator. Elecraft kx3 roofing filters i am a new kx3 user, but i dont know. Since then, a very large number of articles have been published giving examples of these filters. The revolutionary elecraft kx3 puts the world in the palm of your hand.
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