Filters for K3
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On weekends here in the Midwest there are many AM nets (as well as the normal 3.880 Nets) that I like to listen to.
I am curious as a CW guy, I would like to not take away from my already compliment of filters, 500, 200Hz to put in 6 and 13kHz filters, thinking of adding just the 13kHz filter. I also do 52.525. How would the 13kHz filter work for listening to AM? I assume I can start with that filter and use the variable to neck it down? Most of the signals are above S-9 that I listen to. de KG9H, Frank ______________________________________________________________ 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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I find the 6KHz very adequate for AM, both RX and TX.
Bob, K4TAX Sent from my iPhone > On Apr 26, 2019, at 7:36 AM, Frank Krozel <[hidden email]> wrote: > > On weekends here in the Midwest there are many AM nets (as well as the normal 3.880 Nets) that I like to listen to. > I am curious as a CW guy, I would like to not take away from my already compliment of filters, 500, 200Hz to put in 6 and 13kHz filters, thinking of adding just the 13kHz filter. I also do 52.525. > How would the 13kHz filter work for listening to AM? I assume I can start with that filter and use the variable to neck it down? Most of the signals are above S-9 that I listen to. > de KG9H, Frank > > ______________________________________________________________ > 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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In reply to this post by Frank Krozel
Frank,
You can certainly use the 13kHz filter for listening to AM - even for transmitting. It also works for FM as well, so the 6 kHz filter does not have to be present. 73, Don W3FPR On 4/26/2019 8:36 AM, Frank Krozel wrote: > On weekends here in the Midwest there are many AM nets (as well as the normal 3.880 Nets) that I like to listen to. > I am curious as a CW guy, I would like to not take away from my already compliment of filters, 500, 200Hz to put in 6 and 13kHz filters, thinking of adding just the 13kHz filter. I also do 52.525. > How would the 13kHz filter work for listening to AM? I assume I can start with that filter and use the variable to neck it down? Most of the signals are above S-9 that I listen to. ______________________________________________________________ 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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In reply to this post by Bob McGraw - K4TAX
OK thank you everyone fo your input
Sincerely, Frank Krozel t: 1-630-924-1600 [hidden email] BSEE, AASEET, FCC Lic.# PG-18-19178, KG9H Electronic Instrument Associates - Central, Inc. ...since 1971 w: www.electronicinstrument.com d/l our linecard at http://www.electronicinstrument.com/lc.pdf > On Apr 26, 2019, at 8:16 AM, Bob McGraw K4TAX <[hidden email]> wrote: > > I find the 6KHz very adequate for AM, both RX and TX. > > Bob, K4TAX > > > Sent from my iPhone > >> On Apr 26, 2019, at 7:36 AM, Frank Krozel <[hidden email]> wrote: >> >> On weekends here in the Midwest there are many AM nets (as well as the normal 3.880 Nets) that I like to listen to. >> I am curious as a CW guy, I would like to not take away from my already compliment of filters, 500, 200Hz to put in 6 and 13kHz filters, thinking of adding just the 13kHz filter. I also do 52.525. >> How would the 13kHz filter work for listening to AM? I assume I can start with that filter and use the variable to neck it down? Most of the signals are above S-9 that I listen to. >> de KG9H, Frank >> >> ______________________________________________________________ >> 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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In reply to this post by Bob McGraw - K4TAX
If you don't want to transmit but only listen, SSB mode works just fine
with 2.7 or 2.8 kHz filters. 73, Jim K9YC On 4/26/2019 6:16 AM, Bob McGraw K4TAX wrote: > I find the 6KHz very adequate for AM, both RX and TX. ______________________________________________________________ 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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In reply to this post by Frank Krozel
13 KHz filter works very well for AM. It provides +/- 6.5 KHz at IF which is plenty for even the guys with converted broadcast rigs that are generally +/- 5 KHz. The K3/K3S DSP and audio brick wall filters will limit the highest audio frequency to around 4.5 KHz but you can always use the DSP to further reduce the highest audio frequency to 2.8 - 3 KHz if needed to limit QRM. You can further reduce QRM by using the 2.7 or 2.8 KHz filter in synch mode to demodulate either just the upper sideband or lower sideband if one sideband is being clobbered by QRM. 73, ... Joe, W4TV On 2019-04-26 8:36 AM, Frank Krozel wrote: > On weekends here in the Midwest there are many AM nets (as well as the normal 3.880 Nets) that I like to listen to. > I am curious as a CW guy, I would like to not take away from my already compliment of filters, 500, 200Hz to put in 6 and 13kHz filters, thinking of adding just the 13kHz filter. I also do 52.525. > How would the 13kHz filter work for listening to AM? I assume I can start with that filter and use the variable to neck it down? Most of the signals are above S-9 that I listen to. > de KG9H, Frank > ______________________________________________________________ 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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