KFL3C-400 offset?
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I have noticed that also. Luckily I remember which filters are 8 pole but
the website really should specify. N8VZ may also try contacting Inrad. Scott may answer on weekends? John KK9A Dave WW2R wrote The "previous" web site used to implicitly say which filters were 5 pole and which were 8 pole on the ordering page. The new "improved?" website omits this information. Looking to answer the same question recently I had to resort to looking elsewhere on the web! Dave Ww2r ______________________________________________________________ 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 |
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Thanks, I’ll check that out also.
Sent from my iPhone =========================== Carl Jón Denbow, N8VZ 17 Coventry Lane Athens, Ohio 45701-3718 [hidden email] www.n8vz.com EM89wh IRLP 4533 Echolink 116070 PSK and JT65 Forever! =========================== > On Feb 23, 2019, at 6:10 PM, <[hidden email]> <[hidden email]> wrote: > > I have noticed that also. Luckily I remember which filters are 8 pole but > the website really should specify. > > N8VZ may also try contacting Inrad. Scott may answer on weekends? > > John KK9A > > > > Dave WW2R wrote > > > The "previous" web site used to implicitly say which filters were 5 pole and > which were 8 pole on the ordering page. The new "improved?" website omits > this information. Looking to answer the same question recently I had to > resort to looking elsewhere on the web! > > Dave > Ww2r > > ______________________________________________________________ > 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 ______________________________________________________________ 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 |
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To put a wrapper on this thread: I ended up ordering two 400Hz filter direct from Inrad. They had them clearly marked as eight pole and said they were mount-compatible with the K3. I had email exchanges with K3 support, most of which were helpful, but the question about a KFL3C-400 eight-pole filter went unanswered. They seem to have a problem in this area. Not exactly sure why. Uncharacteristic. So, I have two 6-pole 400Hz filters for sale! You can find an ad for them on qth.com: https://swap.qth.com/search-results.php?keywords=n8vz&fieldtosearch=call
73, Carl N8VZ ------ Original Message ------ From: "Carl Jón Denbow" <[hidden email]> To: [hidden email] Cc: [hidden email] Sent: 2/23/2019 7:39:03 PM Subject: Re: [Elecraft] KFL3C-400 offset? > Thanks, I’ll check that out also. > > Sent from my iPhone > =========================== > Carl Jón Denbow, N8VZ > 17 Coventry Lane > Athens, Ohio 45701-3718 > > [hidden email] > www.n8vz.com > EM89wh > > IRLP 4533 Echolink 116070 > > PSK and JT65 Forever! > =========================== > >> On Feb 23, 2019, at 6:10 PM, <[hidden email]> <[hidden email]> wrote: >> >> I have noticed that also. Luckily I remember which filters are 8 pole but >> the website really should specify. >> >> N8VZ may also try contacting Inrad. Scott may answer on weekends? >> >> John KK9A >> >> >> >> Dave WW2R wrote >> >> >> The "previous" web site used to implicitly say which filters were 5 pole and >> which were 8 pole on the ordering page. The new "improved?" website omits >> this information. Looking to answer the same question recently I had to >> resort to looking elsewhere on the web! >> >> Dave >> Ww2r >> >> ______________________________________________________________ >> 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 > > ______________________________________________________________ > 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 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 |
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Just an opine. Since these are ROOFING filters, and not the means of determining the radio’s ultimate selectivity, you may not notice a substantial performance improvement of the radio with 8-pole vs 6-pole filters.
I have my flame suit on, just in case — (it can be almost guaranteed to be needed around here). :-) Grant NQ5T K3 #2091 KX3 #8342 > On Feb 27, 2019, at 12:33 PM, Carl Jón Denbow <[hidden email]> wrote: > > To put a wrapper on this thread: I ended up ordering two 400Hz filter direct from Inrad. They had them clearly marked as eight pole and said they were mount-compatible with the K3. I had email exchanges with K3 support, most of which were helpful, but the question about a KFL3C-400 eight-pole filter went unanswered. They seem to have a problem in this area. Not exactly sure why. Uncharacteristic. So, I have two 6-pole 400Hz filters for sale! You can find an ad for them on qth.com: https://swap.qth.com/search-results.php?keywords=n8vz&fieldtosearch=call > ______________________________________________________________ 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 |
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Grant et al;
I can agree that many hams do not understand the application of "filters" in a radio, specially today with the advancements in DSP technology. I find today that many many hams rely on "old school methodology" to justify what they do. They, for the most part, seem to shy away from learning and understanding how things work today. Times have changed. In fact I see more and more the adage of "what someone said" taking precedence. The roofing filter concept protects the AGC, just as the DSP provides the selectivity. For strong signal operations one should have both. But in many cases in our normal QTH environments, little is to be gained with added roofing filters. This is a slide presentation from Sherwood Engineering on FILTERS, why and why not. http://www.sherweng.com/documents/Barc2008.pdf <http://www.sherweng.com/documents/Barc2008.pdf> I'll take his word for it. It is well worth the read. 73 Bob, K4TAX On 2/27/2019 12:22 PM, Grant Youngman wrote: > Just an opine. Since these are ROOFING filters, and not the means of determining the radio’s ultimate selectivity, you may not notice a substantial performance improvement of the radio with 8-pole vs 6-pole filters. > > I have my flame suit on, just in case — (it can be almost guaranteed to be needed around here). :-) > > Grant NQ5T > K3 #2091 KX3 #8342 > .qsl.net/donate.html ______________________________________________________________ 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 |
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