Sub-Rx Filters
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Hi,
I have a K3 w/o a sub-receiver and continue to enjoy learning about the hobby, and because of that, I’d like to start learning about all the things I can do w/ a sub-receiver. So I’ve ordered the new K3S-F. Seeing as I have several weeks to rethink my order before it ships, I’d like to better understand the sub and filters. I also hear the sub is a pain to remove and wanted to get my filters right initially if possible. When I assembled my K3, I ordered the filters as FM, 2.7, 1.8, 400, and had the last slot open. For the K3S, I have (1) FM, (2) 2.8, and (2) 400’s. So I have the following questions. How will the filters be installed as a factory build? If I have a say so, would it make sense to install it as such (O = open) Slot 1 2 3 4 5 Main FM 2.8 O 400 O Sub O 2.8 O 400 O By doing that, I leave the last slot open for 200Hz filters if they come back, and slot 3 for something between 2.1 and above 400 if I can find a good reason to fill them. My understanding of diversity reception is that I can receive two different frequencies and though used more for CW when working pile-ups, it’s not something I’d likely use for FM, hence the single FM roofing filter. So I was wondering about installing AM on the sub just so that I could have that as well. I'd be interested in knowing how you guys did it. Thanks, ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Your understanding of diversity mode is incorrect. What you described is
NON-diversity mode, i.e. normal or default use of the subRX. In this normal subRX mode, the two receivers are on different frequencies - the main RX (left ear) is on the VFO A frequency (upper display) and the subRX (right ear) is on the VFO B frequency (lower display). The transmitter is on VFO A if SPLIT is off, and on VFO B if SPLIT is on. You can use this for split operation in either orientation (RX on A, TX on B or RX on B, TX on A), or you can use it to monitor two frequencies at once, and choose which of the two to work on depending on whether you turn SPLIT mode on or off. You can also control which RX is/are heard in each ear with a configuration option, but the default is A(main) left, B(sub) right. Diversity mode is quite different. In Diversity mode, BOTH receivers are on VFO A (upper display). You would use a different antenna for each receiver (otherwise there is no point) - because the two receivers are using the same VFO and are phase-locked, the relative strengths and arrival times of signals in the two ears gives you a kind of panoramic soundscape, where the signal you want is localized at a particular position in space (seems to come from a particular direction), while noise is spread over the whole space, and QRM often comes from a different direction relative to the signal you want. It's kind of like stereo (diversity) vs. mono (non-diversity, both receivers on the same antenna). In Diversity mode, the lower VFO B display works just like it does with a single receiver - it tells you where the transmitter will be when SPLIT is on, but it has no connection with either receiver. Do not make the mistake of thinking it tells you where the subRX is - that is only true in non-diversity mode. Normal non-diversity dual receive is usable in all modes, including phone modes, although the level of activity and the likelihood of split operation might be low enough in AM and FM that it might not be economically worthwhile to add subRX filters for these modes. Diversity mode is very useful in CW. It is not useful in digital modes (unless someone can write software to emulate what the human brain does with the inputs from two ears). I don't know how useful it would turn out to be in wider bandwidth modes like SSB, AM and FM - never tried. I don't know how the filters are installed in a factory build, but the arrangement you suggested looks reasonable to me. I don't think there is a hardware requirement to line the filters up in corresponding slots in both receivers, but from a human interface point of view that makes sense. Certainly that's what I did, and like you I left room for the filters I thought I would be most likely to want to add later. 73, Rich VE3KI (unknown call sign) wrote: > My understanding of diversity reception is that I can receive two different > frequencies and though used more for CW when working pile-ups, it's not > something I'd likely use for FM, hence the single FM roofing filter. So I > was wondering about installing AM on the sub just so that I could have that > as well. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Lane-2
> When I assembled my K3, I ordered the filters as FM, 2.7, 1.8, 400, > and had the last slot open. For the K3S, I have (1) FM, (2) 2.8, and > (2) 400’s. So I have the following questions. > > How will the filters be installed as a factory build? My guess is that the filters would be installed in the first two or three slots as they were in my original factory built K3. > If I have a say so, would it make sense to install it as such > (O = open) > Slot 1 2 3 4 5 > Main FM 2.8 O 400 O > Sub O 2.8 O 400 O That is the way mine are done - the Sub RX has a second FM filter (I wanted the ability to use wide audio for SWLing with an Aux antenna) and the main TX has a 1500 Hz filter in slot 3 which I do not use and the 200 Hz filter in slot 5. If I were to do it again, there would be no changes except to replace the 1500 Hz filter with a 1800 or possibly a 2100 (that is my typical SSB bandwidth). The FM filter it just fine for AM - both TX and RX. 73, ... Joe, W4TV On 8/8/2015 12:59 AM, Lane wrote: > Hi, > > I have a K3 w/o a sub-receiver and continue to enjoy learning about the > hobby, and because of that, I’d like to start learning about all the things > I can do w/ a sub-receiver. So I’ve ordered the new K3S-F. Seeing as I have > several weeks to rethink my order before it ships, I’d like to better > understand the sub and filters. I also hear the sub is a pain to remove and > wanted to get my filters right initially if possible. > > When I assembled my K3, I ordered the filters as FM, 2.7, 1.8, 400, and had > the last slot open. For the K3S, I have (1) FM, (2) 2.8, and (2) 400’s. So > I have the following questions. > > How will the filters be installed as a factory build? > > If I have a say so, would it make sense to install it as such (O = open) > Slot 1 2 3 4 5 > Main FM 2.8 O 400 O > Sub O 2.8 O 400 O > > By doing that, I leave the last slot open for 200Hz filters if they come > back, and slot 3 for something between 2.1 and above 400 if I can find a > good reason to fill them. > > My understanding of diversity reception is that I can receive two different > frequencies and though used more for CW when working pile-ups, it’s not > something I’d likely use for FM, hence the single FM roofing filter. So I > was wondering about installing AM on the sub just so that I could have that > as well. > > I'd be interested in knowing how you guys did it. > > Thanks, > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Richard Ferch
There are some other uses of diversity modes which aren't common
in amateur practice, but might be interesting for special applications. Pro-audio radio microphones use diversity receivers to minimize signal loss as the microphones move. I believe, and Jim or Joe will correct me if I am wrong, they transmit using FM. By measuring the degree of quieting on the two receivers, the combiner can decide which signal is better and route that signal to the audio mixing board. Since the audio volume represented by a FM signal is mostly independent of signal strength, good quality audio gets to the board even as the system changes receivers. This kind of system might be useful for amateur weak-signal FM work. The other interesting diversity mode I know of is the way the costal commercial communication radio stations worked in the 1930's and later. They were using CW to send messages across the oceans. Each station transmitted on 3 separate bands. The receivers listened to all 3 bands and routed the "best" signal to the operator. (I don't know how they determined the best signal using 1930s technology.) Obviously a two channel version could be assembled using a K3 with a sub-receiver. A system where you can automatically determine which receiver has the better signal, could be useful for RTTY. Measuring the difference in signal strength of the mark and space signals compared with the signal strength half way between them might be a useful technique. 73 Bill AE6JV On 8/8/15 at 4:37 AM, [hidden email] (Richard Ferch) wrote: >In Diversity mode, the lower VFO B display works just like it >does with a single receiver - it tells you where the >transmitter will be when SPLIT is on, but it has no connection >with either receiver. Do not make the mistake of thinking it >tells you where the subRX is - that is only true in >non-diversity mode. > >Normal non-diversity dual receive is usable in all modes, >including phone modes, although the level of activity and the >likelihood of split operation might be low enough in AM and FM >that it might not be economically worthwhile to add subRX >filters for these modes. > >Diversity mode is very useful in CW. It is not useful in >digital modes (unless someone can write software to emulate >what the human brain does with the inputs from two ears). I >don't know how useful it would turn out to be in wider >bandwidth modes like SSB, AM and FM - never tried. Bill Frantz | gets() remains as a monument | Periwinkle (408)356-8506 | to C's continuing support of | 16345 Englewood Ave www.pwpconsult.com | buffer overruns. | Los Gatos, CA 95032 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Joe Subich, W4TV-4
Joe - How did you get the 200Hz filters for the K3S? I didn't see those as
options anymore, but wished they were. On Sat, Aug 8, 2015 at 7:51 AM, Joe Subich, W4TV <[hidden email]> wrote: > > When I assembled my K3, I ordered the filters as FM, 2.7, 1.8, 400, >> and had the last slot open. For the K3S, I have (1) FM, (2) 2.8, and >> (2) 400’s. So I have the following questions. >> > > > > How will the filters be installed as a factory build? > > My guess is that the filters would be installed in the first two or > three slots as they were in my original factory built K3. > > > If I have a say so, would it make sense to install it as such > > (O = open) > > Slot 1 2 3 4 5 > > Main FM 2.8 O 400 O > > Sub O 2.8 O 400 O > > That is the way mine are done - the Sub RX has a second FM filter > (I wanted the ability to use wide audio for SWLing with an Aux > antenna) and the main TX has a 1500 Hz filter in slot 3 which I > do not use and the 200 Hz filter in slot 5. > > If I were to do it again, there would be no changes except to replace > the 1500 Hz filter with a 1800 or possibly a 2100 (that is my typical > SSB bandwidth). The FM filter it just fine for AM - both TX and RX. > > 73, > > ... Joe, W4TV > > > > On 8/8/2015 12:59 AM, Lane wrote: > >> Hi, >> >> I have a K3 w/o a sub-receiver and continue to enjoy learning about the >> hobby, and because of that, I’d like to start learning about all the >> things >> I can do w/ a sub-receiver. So I’ve ordered the new K3S-F. Seeing as I >> have >> several weeks to rethink my order before it ships, I’d like to better >> understand the sub and filters. I also hear the sub is a pain to remove >> and >> wanted to get my filters right initially if possible. >> >> When I assembled my K3, I ordered the filters as FM, 2.7, 1.8, 400, and >> had >> the last slot open. For the K3S, I have (1) FM, (2) 2.8, and (2) 400’s. So >> I have the following questions. >> >> How will the filters be installed as a factory build? >> >> If I have a say so, would it make sense to install it as such (O = open) >> Slot 1 2 3 4 5 >> Main FM 2.8 O 400 O >> Sub O 2.8 O 400 O >> >> By doing that, I leave the last slot open for 200Hz filters if they come >> back, and slot 3 for something between 2.1 and above 400 if I can find a >> good reason to fill them. >> >> My understanding of diversity reception is that I can receive two >> different >> frequencies and though used more for CW when working pile-ups, it’s not >> something I’d likely use for FM, hence the single FM roofing filter. So I >> was wondering about installing AM on the sub just so that I could have >> that >> as well. >> >> I'd be interested in knowing how you guys did it. >> >> Thanks, >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Richard Ferch
Richard,
Thanks for your reply, very helpful. Never had the rig to try this before. Looking forwards to learning to operate in split, diversity, and any other way possible. Seems like one could write a few books on operating w/ sub-receivers alone. On Sat, Aug 8, 2015 at 6:37 AM, Richard Ferch <[hidden email]> wrote: > Your understanding of diversity mode is incorrect. What you described is > NON-diversity mode, i.e. normal or default use of the subRX. In this normal > subRX mode, the two receivers are on different frequencies - the main RX > (left ear) is on the VFO A frequency (upper display) and the subRX (right > ear) is on the VFO B frequency (lower display). The transmitter is on VFO A > if SPLIT is off, and on VFO B if SPLIT is on. You can use this for split > operation in either orientation (RX on A, TX on B or RX on B, TX on A), or > you can use it to monitor two frequencies at once, and choose which of the > two to work on depending on whether you turn SPLIT mode on or off. You can > also control which RX is/are heard in each ear with a configuration option, > but the default is A(main) left, B(sub) right. > > Diversity mode is quite different. In Diversity mode, BOTH receivers are > on VFO A (upper display). You would use a different antenna for each > receiver (otherwise there is no point) - because the two receivers are > using the same VFO and are phase-locked, the relative strengths and arrival > times of signals in the two ears gives you a kind of panoramic soundscape, > where the signal you want is localized at a particular position in space > (seems to come from a particular direction), while noise is spread over the > whole space, and QRM often comes from a different direction relative to the > signal you want. It's kind of like stereo (diversity) vs. mono > (non-diversity, both receivers on the same antenna). > > In Diversity mode, the lower VFO B display works just like it does with a > single receiver - it tells you where the transmitter will be when SPLIT is > on, but it has no connection with either receiver. Do not make the mistake > of thinking it tells you where the subRX is - that is only true in > non-diversity mode. > > Normal non-diversity dual receive is usable in all modes, including phone > modes, although the level of activity and the likelihood of split operation > might be low enough in AM and FM that it might not be economically > worthwhile to add subRX filters for these modes. > > Diversity mode is very useful in CW. It is not useful in digital modes > (unless someone can write software to emulate what the human brain does > with the inputs from two ears). I don't know how useful it would turn out > to be in wider bandwidth modes like SSB, AM and FM - never tried. > > I don't know how the filters are installed in a factory build, but the > arrangement you suggested looks reasonable to me. I don't think there is a > hardware requirement to line the filters up in corresponding slots in both > receivers, but from a human interface point of view that makes sense. > Certainly that's what I did, and like you I left room for the filters I > thought I would be most likely to want to add later. > > 73, > Rich VE3KI > > > (unknown call sign) wrote: > > My understanding of diversity reception is that I can receive two different >> frequencies and though used more for CW when working pile-ups, it's not >> something I'd likely use for FM, hence the single FM roofing filter. So I >> was wondering about installing AM on the sub just so that I could have >> that >> as well. >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Bill Frantz
On 8/8/2015 6:23 AM, Bill Frantz wrote:
> The other interesting diversity mode I know of is the way the costal > commercial communication radio stations worked in the 1930's and later. > They were using CW to send messages across the oceans. Each station > transmitted on 3 separate bands. The receivers listened to all 3 bands > and routed the "best" signal to the operator. (I don't know how they > determined the best signal using 1930s technology.) Obviously a two > channel version could be assembled using a K3 with a sub-receiver. Well, at least in 56-57, it wasn't exactly diversity [I worked at a coastal marine station for 11 months during that period when I was a HS senior]. Coast stations [three letter calls] were assigned specific ITU-defined channels [freqs] in each of the maritime bands, both MF and HF. Everyone could use 500 Kcs. A coast station would transmit its "wheel" on all of its assigned HF frequencies, except those for which there was no propagation, such as 22 Mcs at night. The wheel might have comprised: VVV VVV VVV DE KOK KOK KOK QTC <list of ships for which KOK was holding traffic> QSX <list of MF/HF maritime bands on which KOK was standing watch for calls> AR. The QSX was followed by the band designators only, such as "4 6 8 12", the ship operator had a printed directory of the assigned frequencies in each band. HF channels were full-duplex, coast station on its assigned frequency, ship on the second frequency in that band paired with the coast station. When the operator afloat opened his watch, he would start the log and listen for his company's station wheel. If his call was in the list, he called the station, the traffic was passed, his call was removed from the wheel [usually paper tape] and the wheel continued. In most [but not all] cases, the operators on the ships worked for the same companies that owned the various coast stations. So, while multiple frequencies were involved in this process, the ship was almost always on only one, so it wasn't really diversity reception in the technical sense. 500 Kc [600 meters, the "Holy Frequency"] was a huge, simplex, world-wide party-line. > > A system where you can automatically determine which receiver has the > better signal, could be useful for RTTY. Measuring the difference in > signal strength of the mark and space signals compared with the signal > strength half way between them might be a useful technique. In the mid-60's [while in the US military in SE Asia], we used real diversity on multi-channel troposcatter systems. The AN/MRC-98 was an example. In the 450-550 MHz range, 2-10 KW transmitters to two 9.1 meter dishes, each with two cross-polarized feed horns. 4 receivers, 2 each on each of the two frequencies with phase locked local oscillators for pair. 60 good quality telephone channels over 400-500 km paths. Modulation was FM, the combiner watched the SNR from each RX [which varied all over the place], and added the basebands together using all analog circuitry for best output SNR. The two PA's were Eimac klystrons, about 1.6 meters long. Space, polarization, and frequency diversity. It was somewhat mesmerizing to sit in in front of the receiver bank and watch the SNR on the single receivers fluctuating wildly while the SNR on the baseband would drift very slowly up and down in very small increments. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Lane-2
Lane,
For my needs I only installed just the 2.8-KHz filter in my KRX3 in FL2 position to match the 2.8-KHz filter in the main-Rx. Since bandwidth is set by the DSP and I do very little HF CW, so this is sufficient for my use of diversity mode. I have the 13-KHz in FL1 (for FM/AM), 2.8-KHz in FL2 (for CW/SSB), and 400-Hz in FL4 (for CW) installed in the main-Rx. I left FL3 position open in both Rx because I chose that when running diversity reception on digital modes (DATA A, USB) where signals are output on the 1st IF connectors and bypasses the roofing filters (and 2nd-IF/DSP). I found that having FL2 selected when I run everything thru my LP-Pan caused a signal "suck-out" near zero frequency, and was cured by selecting an open filter position. MAP65 uses the LP-Pan, whereas WSJT10/JT65 uses the normal LINE-OUT from the DSP section. I would not worry about any of this for your application. 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Lane-2
Rich,
I guess I can understand why you would think this (excerp below), but diversity is as useful for digital as voice/CW. The difference it you don't copy digital with your ears - you see it on your monitor. Probably most digital sw do not implement diversity reception but a couple do: MAP65 implements dual-polarity reception using diversity mode and very effectively resolves the correct polarity of the received signal while peaking the signal to match (one other program called Linrad can do this). Benefit of diversity reception is not limited to one bandwidth. MAP65 uses 90-KHz! Digital modes can do this because the entire RF spectrum (limited by the roofing filter) is digitized by the DSP in a SDR. DSP then applies digital bandwidth filters to separate signals. In fact that is how the K3 and K3S do it. But then later processing demodulates the mode desired (CW, SSB, AM, FM, DATA). I don't think K3 firmware has implemented diversity Rx for digital modes, but it could be done (if wanted). More likely it would be accomplished by special sw in an external computer. 73, Ed - KL7UW From: Richard Ferch <[hidden email]> To: "[hidden email]" <[hidden email]> Subject: Re: [Elecraft] Sub-Rx Filters ----snip Diversity mode is very useful in CW. It is not useful in digital modes (unless someone can write software to emulate what the human brain does with the inputs from two ears). I don't know how useful it would turn out to be in wider bandwidth modes like SSB, AM and FM - never tried. ----snip 73, Rich VE3KI 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Lane-2
I suspect Joe, like me will not part with his 200Hz filters, so he
used the one(s) in his old K3 ;-) On Sat, 8 Aug 2015 12:46:46 -0500, you wrote: >Joe - How did you get the 200Hz filters for the K3S? I didn't see those as >options anymore, but wished they were. > >On Sat, Aug 8, 2015 at 7:51 AM, Joe Subich, W4TV <[hidden email]> wrote: > >> >> When I assembled my K3, I ordered the filters as FM, 2.7, 1.8, 400, >>> and had the last slot open. For the K3S, I have (1) FM, (2) 2.8, and >>> (2) 400s. So I have the following questions. >>> >> > >> > How will the filters be installed as a factory build? >> >> My guess is that the filters would be installed in the first two or >> three slots as they were in my original factory built K3. >> >> > If I have a say so, would it make sense to install it as such >> > (O = open) >> > Slot 1 2 3 4 5 >> > Main FM 2.8 O 400 O >> > Sub O 2.8 O 400 O >> >> That is the way mine are done - the Sub RX has a second FM filter >> (I wanted the ability to use wide audio for SWLing with an Aux >> antenna) and the main TX has a 1500 Hz filter in slot 3 which I >> do not use and the 200 Hz filter in slot 5. >> >> If I were to do it again, there would be no changes except to replace >> the 1500 Hz filter with a 1800 or possibly a 2100 (that is my typical >> SSB bandwidth). The FM filter it just fine for AM - both TX and RX. >> >> 73, >> >> ... Joe, W4TV >> >> >> >> On 8/8/2015 12:59 AM, Lane wrote: >> >>> Hi, >>> >>> I have a K3 w/o a sub-receiver and continue to enjoy learning about the >>> hobby, and because of that, Id like to start learning about all the >>> things >>> I can do w/ a sub-receiver. So Ive ordered the new K3S-F. Seeing as I >>> have >>> several weeks to rethink my order before it ships, Id like to better >>> understand the sub and filters. I also hear the sub is a pain to remove >>> and >>> wanted to get my filters right initially if possible. >>> >>> When I assembled my K3, I ordered the filters as FM, 2.7, 1.8, 400, and >>> had >>> the last slot open. For the K3S, I have (1) FM, (2) 2.8, and (2) 400s. So >>> I have the following questions. >>> >>> How will the filters be installed as a factory build? >>> >>> If I have a say so, would it make sense to install it as such (O = open) >>> Slot 1 2 3 4 5 >>> Main FM 2.8 O 400 O >>> Sub O 2.8 O 400 O >>> >>> By doing that, I leave the last slot open for 200Hz filters if they come >>> back, and slot 3 for something between 2.1 and above 400 if I can find a >>> good reason to fill them. >>> >>> My understanding of diversity reception is that I can receive two >>> different >>> frequencies and though used more for CW when working pile-ups, its not >>> something Id likely use for FM, hence the single FM roofing filter. So I >>> was wondering about installing AM on the sub just so that I could have >>> that >>> as well. >>> >>> I'd be interested in knowing how you guys did it. >>> >>> Thanks, >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] >> >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html >Message delivered to [hidden email] N5GE ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]
Amateur Radio Operator N5GE
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In reply to this post by Lane-2
Yes, do tell, I want one in the future.
On August 8, 2015 1:46:46 PM EDT, Lane <[hidden email]> wrote: >Joe - How did you get the 200Hz filters for the K3S? I didn't see those >as >options anymore, but wished they were. > >On Sat, Aug 8, 2015 at 7:51 AM, Joe Subich, W4TV <[hidden email]> >wrote: > >> >> When I assembled my K3, I ordered the filters as FM, 2.7, 1.8, 400, >>> and had the last slot open. For the K3S, I have (1) FM, (2) 2.8, and >>> (2) 400’s. So I have the following questions. >>> >> > >> > How will the filters be installed as a factory build? >> >> My guess is that the filters would be installed in the first two or >> three slots as they were in my original factory built K3. >> >> > If I have a say so, would it make sense to install it as such >> > (O = open) >> > Slot 1 2 3 4 5 >> > Main FM 2.8 O 400 O >> > Sub O 2.8 O 400 O >> >> That is the way mine are done - the Sub RX has a second FM filter >> (I wanted the ability to use wide audio for SWLing with an Aux >> antenna) and the main TX has a 1500 Hz filter in slot 3 which I >> do not use and the 200 Hz filter in slot 5. >> >> If I were to do it again, there would be no changes except to replace >> the 1500 Hz filter with a 1800 or possibly a 2100 (that is my typical >> SSB bandwidth). The FM filter it just fine for AM - both TX and RX. >> >> 73, >> >> ... Joe, W4TV >> >> >> >> On 8/8/2015 12:59 AM, Lane wrote: >> >>> Hi, >>> >>> I have a K3 w/o a sub-receiver and continue to enjoy learning about >the >>> hobby, and because of that, I’d like to start learning about all the >>> things >>> I can do w/ a sub-receiver. So I’ve ordered the new K3S-F. Seeing as >I >>> have >>> several weeks to rethink my order before it ships, I’d like to >better >>> understand the sub and filters. I also hear the sub is a pain to >remove >>> and >>> wanted to get my filters right initially if possible. >>> >>> When I assembled my K3, I ordered the filters as FM, 2.7, 1.8, 400, >and >>> had >>> the last slot open. For the K3S, I have (1) FM, (2) 2.8, and (2) >400’s. So >>> I have the following questions. >>> >>> How will the filters be installed as a factory build? >>> >>> If I have a say so, would it make sense to install it as such (O = >open) >>> Slot 1 2 3 4 5 >>> Main FM 2.8 O 400 O >>> Sub O 2.8 O 400 O >>> >>> By doing that, I leave the last slot open for 200Hz filters if they >come >>> back, and slot 3 for something between 2.1 and above 400 if I can >find a >>> good reason to fill them. >>> >>> My understanding of diversity reception is that I can receive two >>> different >>> frequencies and though used more for CW when working pile-ups, it’s >not >>> something I’d likely use for FM, hence the single FM roofing filter. >So I >>> was wondering about installing AM on the sub just so that I could >have >>> that >>> as well. >>> >>> I'd be interested in knowing how you guys did it. >>> >>> Thanks, >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] >> >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html >Message delivered to [hidden email] -- Sent from my Android device with K-9 Mail. Please excuse my brevity. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by k6dgw
I use a West Mountain Radio CLRspkr with my K3. A friend is giving me his CLRspkr. Using a stereo Y-adapter, could I use both, one for the main receiver and one for the sub receiver? I know to set the CONFIG-SPKRS to 2.
Steve K6SAB ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: West Mountain Radio CLRspkr
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Yes! Send one receiver to one speaker and one to the other. Check to see which ear hears which speaker. Same with headsets, but you get more separation. You can use it for split or for diversity. Willis 'Cookie' Cooke,TDXS Contest Chairman K5EWJ & Trustee N5BPS
From: Steven Bertsch <[hidden email]> To: [hidden email] Sent: Saturday, August 8, 2015 5:15 PM Subject: [Elecraft] West Mountain Radio CLRspkr I use a West Mountain Radio CLRspkr with my K3. A friend is giving me his CLRspkr. Using a stereo Y-adapter, could I use both, one for the main receiver and one for the sub receiver? I know to set the CONFIG-SPKRS to 2. Steve K6SAB ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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