Re: [Elecraft] Auto Bandpass Filter
Skywobbly [SKYY-wah-blee] n. Flight path of a helicopter when being piloted by Fred More seriously, mating a connector also has the benefit of sinking some of the heat in the pins lowering the chances of melting the dielectric. 73, Fred K6DGW - Northern California Contest Club - CU in the 2014 Cal QSO Party 4-5 Oct 2014 - www.cqp.org On 11/24/2013 10:08 PM, Jim Brown wrote: Be VERY careful soldering the DIN connector at the filter set -- it's an el-cheapo grande with a dielectric that easily melts. I've found that liquid flux helps, and it also helps to have the connector you're soldering mated to a connector of opposite gender so that the pins don't go skywobbly. (Skywobbly is a technical term that I learned from my grandfather, who was an EE grad of Pratt, in Brooklyn, and who worked in the coal mines long before I was born). __ 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] Auto Bandpass Filter
I am building the 5B4AGN Bandpass filter. Once it is together, what do I need to do to make my K3 auto band switch? Marty W5MF -- View this message in context: http://elecraft.365791.n2.nabble.com/Auto-Bandpass-Filter-tp5255506p7581136.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Auto Bandpass Filter
On 11/24/2013 9:17 PM, W5MF wrote: I am building the 5B4AGN Bandpass filter. Once it is together, what do I need to do to make my K3 auto band switch? I've done exactly that for the two K3s and two filter sets in my SO2R station. You need a properly wired cable between each K3 and the associated 5B4AGN filter box. Study the 5B4AGN manual and K3 manual for connector wiring, and build your own cable using quality connectors Works perfectly. Be VERY careful soldering the DIN connector at the filter set -- it's an el-cheapo grande with a dielectric that easily melts. I've found that liquid flux helps, and it also helps to have the connector you're soldering mated to a connector of opposite gender so that the pins don't go skywobbly. (Skywobbly is a technical term that I learned from my grandfather, who was an EE grad of Pratt, in Brooklyn, and who worked in the coal mines long before I was born). 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
[Elecraft] Auto Bandpass Filter
Ok so I'm looking for an auto band pass filter to use with the K3... Would be slick if the filter could be interfaced directly to the K3 but I'm planning on needing a band decoder/smart switch for different widgets later in life that I've been planning on starting so this may be the opportunity for that project to need to start. Anyway I've been trying to find all my options and some pros/cons of the different solutions from people who have experience with them. These are the units I've found... Please let me know if you have experience with these such as ease of interfacing, build quality, power handling, longevity, loss, out of band attenuation and what not. Array Solutions FilterMAX II: http://www.arraysolutions.com/Hamation/bandpassfilters.htm#top%20of% 20page Array Solutions Filter Master (FM-6): http://www.arraysolutions.com/Products/wx0bbpf6.htm I.C.E. 419B http://www.iceradioproducts.com/filtersrf.html#3 DuneStar Model 600: __ 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] Auto Bandpass Filter (sorry sent too soon)
Ok so I'm looking for an auto band pass filter to use with the K3... Would be slick if the filter could be interfaced directly to the K3 but I'm planning on needing a band decoder/smart switch for different widgets later in life that I've been planning on starting so this may be the opportunity for that project to need to start. Anyway I've been trying to find all my options and some pros/cons of the different solutions from people who have experience with them. These are the units I've found... Please let me know if you have experience with these such as ease of interfacing, build quality, power handling, longevity, loss, out of band attenuation and what not. Array Solutions FilterMAX II: http://www.arraysolutions.com/Hamation/bandpassfilters.htm#top%20of%20page Array Solutions Filter Master (FM-6): http://www.arraysolutions.com/Products/wx0bbpf6.htm I.C.E. 419B http://www.iceradioproducts.com/filtersrf.html#3 DuneStar Model 600: http://www.dunestar.com/model600.htm Well crud I ended up sending too soon (hit ctrl+enter on accident) Anyway I've considered the FilterMAX II as it seems to be the best built with a nice modular filter replacement scheme but its the most expensive. I wish that they were a bit more informative in the manual and explained what the pinouts were and how the thing determined what band to be on. The switches mentioned don't really make a whole lot of sense as there are more positions mentioned than one can hold as far as filters... Confusing to say the least but I'm sure once I had one in hand I could figure it out. Then there is the filter master 6 which is a slick little idea in that its just a coax switch essentially and then one can use individual filters from Dunestar, ICE, or Array Solutions (I'm sure there are others that I'm forgetting and I'd like to know about)... I have the same gripe about not explaining the pin outs here but I'd bet it has the same configuration as the FilterMAX II Then there is the I.C.E. 419B which seems like its awfully small in comparison to some of the other units. I begin to wonder about its power handling but I have a friend who has their individual filters and seems quite happy with them. I don't think he uses them very often though so I don't know about longevity really or about power handling all that much. I do mostly CW but would also like to be able to use this system during a RTTY contest at 100W. Finally the Dunestar model looks like its ok however power ratings seem a bit scary. All they state is that the filters are intended for use wiht transceivers and then state that this is not to imply a 100% duty cycle. What the heck does that mean? Anyway input is greatly appreciated. __ 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] Auto Bandpass Filter (sorry sent too soon)
Brett, For all of the solutions you list, you will need a band-decoder to take the band data (Yaesu standard) from the K3 and convert it to contact closures that will drive any of the filter units you have mentioned. So, the wiring depends on the band decoder you choose and it's pretty straight-forward. One connection per band + ground. The FilterMAX II you refer to uses W3NQN design bandpass filters and therfore provides the best bandpass filtering - on the order of 75 to 80db or so. The ICE and Dunestar filters are less capable and have filtering in the range of only 30 to 35 db. In addition to the filter quality, the FilterMAX II integrates with the Array Solutions BandMaster II band decoder using a new 4-wire control system along with 4-wire network integration with the new 8-pak SO2R antenna switch. Details are on the Array Solutions website. 73, Bob W5OV Array Solutions W5OV/1 Ok so I'm looking for an auto band pass filter to use with the K3... Would be slick if the filter could be interfaced directly to the K3 but I'm planning on needing a band decoder/smart switch for different widgets later in life that I've been planning on starting so this may be the opportunity for that project to need to start. Anyway I've been trying to find all my options and some pros/cons of the different solutions from people who have experience with them. These are the units I've found... Please let me know if you have experience with these such as ease of interfacing, build quality, power handling, longevity, loss, out of band attenuation and what not. Array Solutions FilterMAX II: http://www.arraysolutions.com/Hamation/bandpassfilters.htm#top%20of%20page Array Solutions Filter Master (FM-6): http://www.arraysolutions.com/Products/wx0bbpf6.htm I.C.E. 419B http://www.iceradioproducts.com/filtersrf.html#3 DuneStar Model 600: http://www.dunestar.com/model600.htm Well crud I ended up sending too soon (hit ctrl+enter on accident) Anyway I've considered the FilterMAX II as it seems to be the best built with a nice modular filter replacement scheme but its the most expensive. I wish that they were a bit more informative in the manual and explained what the pinouts were and how the thing determined what band to be on. The switches mentioned don't really make a whole lot of sense as there are more positions mentioned than one can hold as far as filters... Confusing to say the least but I'm sure once I had one in hand I could figure it out. Then there is the filter master 6 which is a slick little idea in that its just a coax switch essentially and then one can use individual filters from Dunestar, ICE, or Array Solutions (I'm sure there are others that I'm forgetting and I'd like to know about)... I have the same gripe about not explaining the pin outs here but I'd bet it has the same configuration as the FilterMAX II Then there is the I.C.E. 419B which seems like its awfully small in comparison to some of the other units. I begin to wonder about its power handling but I have a friend who has their individual filters and seems quite happy with them. I don't think he uses them very often though so I don't know about longevity really or about power handling all that much. I do mostly CW but would also like to be able to use this system during a RTTY contest at 100W. Finally the Dunestar model looks like its ok however power ratings seem a bit scary. All they state is that the filters are intended for use wiht transceivers and then state that this is not to imply a 100% duty cycle. What the heck does that mean? Anyway input is greatly appreciated. __ 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] Auto Bandpass Filter (sorry sent too soon)
I ran 2 Dunestar 600s for 3 years with no problems in contest service. They are very well built, and the support is fine. ICE can be very hard to get ahold of, but a lot of contesters use the 419B without notable trouble, so far as I know. The W3NQN filters that Array Solutions uses are definitely superior to the filters in the other units, but you pay for the privilege, and whether they are worth it is moot, so far as I am concerned. I think I'd prefer to go with the Dunestars and add stubs to deal with troublesome combinations of bands (keeping 40 out of my 20 meter RX was always hard for me). I think you'll find that all of these units rely on switching voltages provided by band decoders, so that's another piece of hardware you would need as an intermediary between your radio or computer and the BPFs. 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com, spots at telnet.reversebeacon.net, port 7000 __ 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] Auto Bandpass Filter (sorry sent too soon)
I have a pair of Dunestar 600 boxes that I've used for years, including 100 watt rtty contests. I've never once had a problem. My buddy W7WW across town has a pair of ICE boxes, and he has had a few problems. He has blown capacitors on 10 and 15 meters. We replaced the caps with heavier duty units, with multiple capacitors in parallel. He has also had problems with dropout of receive signals through the ICE. That unit has 12 sets of relay contacts in series with the signal path. On any given band, two of the contacts are energized closed, and ten are in the normally open position. It's the normally open ones that cause receive signal dropouts. The solution is to whack the box, which gets old pretty fast. For a band decoder, here is a cost effective solution: http://www.unifiedmicro.com/decoder.html K3's older than sn 2362 will need to have the External Data Pull-up Mod installed to work with this band decoder. Dave Hachadorian, K6LL Big Bear Lake, CA -- From: Brett Howard br...@livecomputers.com Sent: Monday, July 05, 2010 3:15 AM To: elecraft elecraft@mailman.qth.net Subject: Re: [Elecraft] Auto Bandpass Filter (sorry sent too soon) Ok so I'm looking for an auto band pass filter to use with the K3... Would be slick if the filter could be interfaced directly to the K3 but I'm planning on needing a band decoder/smart switch for different widgets later in life that I've been planning on starting so this may be the opportunity for that project to need to start. Anyway I've been trying to find all my options and some pros/cons of the different solutions from people who have experience with them. These are the units I've found... Please let me know if you have experience with these such as ease of interfacing, build quality, power handling, longevity, loss, out of band attenuation and what not. Array Solutions FilterMAX II: http://www.arraysolutions.com/Hamation/bandpassfilters.htm#top%20of%20page Array Solutions Filter Master (FM-6): http://www.arraysolutions.com/Products/wx0bbpf6.htm I.C.E. 419B http://www.iceradioproducts.com/filtersrf.html#3 DuneStar Model 600: http://www.dunestar.com/model600.htm Well crud I ended up sending too soon (hit ctrl+enter on accident) Anyway I've considered the FilterMAX II as it seems to be the best built with a nice modular filter replacement scheme but its the most expensive. I wish that they were a bit more informative in the manual and explained what the pinouts were and how the thing determined what band to be on. The switches mentioned don't really make a whole lot of sense as there are more positions mentioned than one can hold as far as filters... Confusing to say the least but I'm sure once I had one in hand I could figure it out. Then there is the filter master 6 which is a slick little idea in that its just a coax switch essentially and then one can use individual filters from Dunestar, ICE, or Array Solutions (I'm sure there are others that I'm forgetting and I'd like to know about)... I have the same gripe about not explaining the pin outs here but I'd bet it has the same configuration as the FilterMAX II Then there is the I.C.E. 419B which seems like its awfully small in comparison to some of the other units. I begin to wonder about its power handling but I have a friend who has their individual filters and seems quite happy with them. I don't think he uses them very often though so I don't know about longevity really or about power handling all that much. I do mostly CW but would also like to be able to use this system during a RTTY contest at 100W. Finally the Dunestar model looks like its ok however power ratings seem a bit scary. All they state is that the filters are intended for use wiht transceivers and then state that this is not to imply a 100% duty cycle. What the heck does that mean? Anyway input is greatly appreciated. __ 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] Auto Bandpass Filter (sorry sent too soon)
In addition to the prepackaged solutions one can purchase a set of individual band filters from Rig Expert or Array Solutions (or build your own W3NQN design filters from the published data) and use a pair of double switches (two radio antenna switches) to select the appropriate filter. The dual switch/single band filters have the advantage of permitting the addition of single band stubs where needed. As suggested by someone else, W9XT BCD-10 is a very good, simple decoder for use with the K3 if you are only controlling a single device (e.g. filter switch). If you are controlling filters plus multiple antennas, plus amplifiers, plus receive antennas a more capable band decoder would be appropriate G. 73, ... Joe, W4TV On 7/5/2010 6:15 AM, Brett Howard wrote: Ok so I'm looking for an auto band pass filter to use with the K3... Would be slick if the filter could be interfaced directly to the K3 but I'm planning on needing a band decoder/smart switch for different widgets later in life that I've been planning on starting so this may be the opportunity for that project to need to start. Anyway I've been trying to find all my options and some pros/cons of the different solutions from people who have experience with them. These are the units I've found... Please let me know if you have experience with these such as ease of interfacing, build quality, power handling, longevity, loss, out of band attenuation and what not. Array Solutions FilterMAX II: http://www.arraysolutions.com/Hamation/bandpassfilters.htm#top%20of%20page Array Solutions Filter Master (FM-6): http://www.arraysolutions.com/Products/wx0bbpf6.htm I.C.E. 419B http://www.iceradioproducts.com/filtersrf.html#3 DuneStar Model 600: http://www.dunestar.com/model600.htm Well crud I ended up sending too soon (hit ctrl+enter on accident) Anyway I've considered the FilterMAX II as it seems to be the best built with a nice modular filter replacement scheme but its the most expensive. I wish that they were a bit more informative in the manual and explained what the pinouts were and how the thing determined what band to be on. The switches mentioned don't really make a whole lot of sense as there are more positions mentioned than one can hold as far as filters... Confusing to say the least but I'm sure once I had one in hand I could figure it out. Then there is the filter master 6 which is a slick little idea in that its just a coax switch essentially and then one can use individual filters from Dunestar, ICE, or Array Solutions (I'm sure there are others that I'm forgetting and I'd like to know about)... I have the same gripe about not explaining the pin outs here but I'd bet it has the same configuration as the FilterMAX II Then there is the I.C.E. 419B which seems like its awfully small in comparison to some of the other units. I begin to wonder about its power handling but I have a friend who has their individual filters and seems quite happy with them. I don't think he uses them very often though so I don't know about longevity really or about power handling all that much. I do mostly CW but would also like to be able to use this system during a RTTY contest at 100W. Finally the Dunestar model looks like its ok however power ratings seem a bit scary. All they state is that the filters are intended for use wiht transceivers and then state that this is not to imply a 100% duty cycle. What the heck does that mean? Anyway input is greatly appreciated. __ 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] Auto Bandpass Filter
Ameritron makes an RCS12 control head that I use here. I have about a dozen of them in use. It not only is programmable as to the allowed output ports for a radio's band data input, it also works as an antenna switch controller and will lock out the wrong antennas on the wrong bands. It prevents hot switching antenna relays by locking out any changes while transmitting. Band decoder and antenna controller with amplifier lockout all in one box. :-) http://www.ameritron.com/man/pdf/RCS-12.pdf 73 Tom As suggested by someone else, W9XT BCD-10 is a very good, simple decoder for use with the K3 if you are only controlling a single device (e.g. filter switch). If you are controlling filters plus multiple antennas, plus amplifiers, plus receive antennas a more capable band decoder would be appropriate G. __ 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] Auto Bandpass Filter (sorry sent too soon)
Here is a nice unit from an ex-pat, Bob, big into contesting. http://www.5b4agn.net/ Incidentally, if you fancy making one yourself I have sets of wound toroids. David G3UNA Ok so I'm looking for an auto band pass filter to use with the K3... Would be slick if the filter could be interfaced directly to the K3 but I'm planning on needing a band decoder/smart switch for different widgets later in life that I've been planning on starting so this may be the opportunity for that project to need to start. __ 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] Auto Bandpass Filter
If you are doing this for an SO2R or multi-transmitter installation and no two radios never ever need to be on the same band, perhaps you can configure the switching to use one set of separately enclosed W3NQN filters rather than a pair of products that has a switch and six filters each. There's a fair amount of connector cost and jumper jungle associated with a solution like this, which needs to be compared with the cost of the W3NQN bandpass filters themselves. A set of six distinct W3NQN filters and a pair of 2 x n switches is a bit more flexible (and might provide a bit better isolation) than a box containing a switch and six filters. But it's messy and takes up a lot of space. I considered this option, and chose two boxes containing switches and 6 filters instead. I didn't like the jumper jungle. There is a (perhaps small) market for a 2 x 6 SO2R bandpass filter box with four coax connectors, radio 1 in and out, radio 2 in and out. There used to be a note on the Array Solutions site that described this configuration, associated with their FM-6. The product offering was two FM-6's, a set of six W3NQN filters and a lot of jumpers. I can't find it now. Perhaps it has been superseded by the much neater configuration with a separate set of filters for each radio. One multi-op I visit uses just one set of six separately enclosed W3NQN filters, connected to the input side of each of six single-band amplifiers. Amp/bandpass filter selection is performed by routing a radio to one of the amplifiers. Antenna switching consists of selecting one of the available antennas for that band only. Still another multi-radio single operator configuration I saw some years ago used separate radios and amps (that shared a common HV supply) and antenna tuners for each band. The single operator changed bands by rolling his chair to a new position. Dick, K6KR __ 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] Auto Bandpass Filter
Ameritron makes an RCS12 control head that I use here. I have about a dozen of them in use. W8JI This is a neat controller. I have a review of it in the Product Reviews section of my website at www.ad5x.com. Phil - AD5X __ 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] Auto Bandpass Filter
I used to use a Dunestar 600 with my K3, but I have now built and use the 5B4AGN boards (see http://www.5b4agn.net/) for the w3nqn filters which interfaces to my K3 and other radios Dave ww2r Message: 2 Date: Mon, 05 Jul 2010 03:05:52 -0700 From: Brett Howard br...@livecomputers.com Subject: [Elecraft] Auto Bandpass Filter To: elecraft elecraft@mailman.qth.net Message-ID: 1278324352.1896.87.ca...@lappy Content-Type: text/plain; charset=UTF-8 Ok so I'm looking for an auto band pass filter to use with the K3... Would be slick if the filter could be interfaced directly to the K3 but I'm planning on needing a band decoder/smart switch for different widgets later in life that I've been planning on starting so this may be the opportunity for that project to need to start. Anyway I've been trying to find all my options and some pros/cons of the different solutions from people who have experience with them. These are the units I've found... Please let me know if you have experience with these such as ease of interfacing, build quality, power handling, longevity, loss, out of band attenuation and what not. Array Solutions FilterMAX II: http://www.arraysolutions.com/Hamation/bandpassfilters.htm#top%20of% 20page Array Solutions Filter Master (FM-6): http://www.arraysolutions.com/Products/wx0bbpf6.htm I.C.E. 419B http://www.iceradioproducts.com/filtersrf.html#3 DuneStar Model 600: -- __ 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] Auto Bandpass Filter
What does Array Solutions want for their Hamation switched unit? Consider shipping and repair... Dick Sent from my iPhone On Jul 5, 2010, at 2:01 PM, elecr...@g4fre.com wrote: I used to use a Dunestar 600 with my K3, but I have now built and use the 5B4AGN boards (see http://www.5b4agn.net/) for the w3nqn filters which interfaces to my K3 and other radios Dave ww2r Message: 2 Date: Mon, 05 Jul 2010 03:05:52 -0700 From: Brett Howard br...@livecomputers.com Subject: [Elecraft] Auto Bandpass Filter To: elecraft elecraft@mailman.qth.net Message-ID: 1278324352.1896.87.ca...@lappy Content-Type: text/plain; charset=UTF-8 Ok so I'm looking for an auto band pass filter to use with the K3... Would be slick if the filter could be interfaced directly to the K3 but I'm planning on needing a band decoder/smart switch for different widgets later in life that I've been planning on starting so this may be the opportunity for that project to need to start. Anyway I've been trying to find all my options and some pros/cons of the different solutions from people who have experience with them. These are the units I've found... Please let me know if you have experience with these such as ease of interfacing, build quality, power handling, longevity, loss, out of band attenuation and what not. Array Solutions FilterMAX II: http://www.arraysolutions.com/Hamation/bandpassfilters.htm#top%20of% 20page Array Solutions Filter Master (FM-6): http://www.arraysolutions.com/Products/wx0bbpf6.htm I.C.E. 419B http://www.iceradioproducts.com/filtersrf.html#3 DuneStar Model 600: -- __ 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
