Re: [Elecraft] IF OUT - Same as just sharing the antenna?
The I-F output samples the signal after the first down conversion but before the narrow band filtering. Because of its location, it is behind the T/R switching and doesn't need further protection. For the usual applications, e.g. a bandscope (panadapter) the (nearly*) fixed frequency is preferred. If you want to tap the antenna for a second radio to tune another band then obviously you don't want the I-F. *In the Elecraft radios the I-F varies depending on sideband, CW pitch etc. I used SDR-IQs run with SpectraVue software as bandscopes with my K3 and K3S for years. SpectraVue has the smarts built in to accommodate this frequency shifting and to remove it from the frequency display. I believe some of the video game SDR programs will do this as well. SpectraVue will also track your TS-890 when the antenna is shared. The SDR is protected by the T/R switching but you have to put up with the clacking relay that shares the antenna. Wes N7WS On 3/9/2024 1:37 PM, JHR wrote: Please help me understand how the IF OUT works on an Elecraft radio. Is it the same thing as sharing the antenna with a T/R switch, or does it tap the RF processing chain later down the line. Does the IF OUT merely share the antenna, or does it come later in the circuit - are there any practical reasons why one is better than the other? I presume the IF OUT is better, but wonder why. [It matters and will settle a bet who eats steak and who eats hot dog.] Thanks in advance K8JHR __ 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 Message delivered to wes_n...@triconet.org __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] IF OUT - Same as just sharing the antenna?
Programs such as SDR Console V3 make accommodations for IF OUTPUTso that it can be used but it is limited in some ways as compared to havingand using the shared antenna (RF OUTPUT). If I have it, I use RF Output. de Wb8yqj DonWB8YQJ Website | | | | WB8YQJ Website | | | Please help me understand how the IF OUT works on an Elecraft radio.? Is it the same thing as sharing the antenna with a T/R switch, or does it tap the RF processing chain later down the line. Does the IF OUT merely share the antenna, or does it come later in the circuit - are there any practical reasons why one is better than the other?? I presume the IF OUT is better, but wonder why. __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] IF OUT - Same as just sharing the antenna?
The K3's IF OUT bandwidth is limited only by the front-end RF filters so it covers an entire amateur band, plus. That is handy for a panadapter because it is always centered on the VFO A frequency. The IF center frequency is 8.215 MHz. Alan N1AL On 3/9/2024 11:04 PM, Fred Jensen wrote: It's around 8.15 MHz. It's ahead of the ADC and 15 kHz 2nd IF, the RF is over 200 kHz wide and is nominally there for connection to a P3. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County Ed Parish wrote on 3/9/2024 12:57 PM: IF means Intermediate Frequency. It is the result of mixing the RF with a local oscillator, LO. So, no, it isn't sharing an antenna. On Sat, Mar 9, 2024, 15:39 JHR wrote: Please help me understand how the IF OUT works on an Elecraft radio. Is it the same thing as sharing the antenna with a T/R switch, or does it tap the RF processing chain later down the line. Does the IF OUT merely share the antenna, or does it come later in the circuit - are there any practical reasons why one is better than the other? I presume the IF OUT is better, but wonder why. [It matters and will settle a bet who eats steak and who eats hot dog.] Thanks in advance K8JHR __ 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 Message delivered tok1ep.l...@gmail.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 Message delivered tok6dg...@gmail.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] IF OUT - Same as just sharing the antenna?
It's around 8.15 MHz. It's ahead of the ADC and 15 kHz 2nd IF, the RF is over 200 kHz wide and is nominally there for connection to a P3. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County Ed Parish wrote on 3/9/2024 12:57 PM: IF means Intermediate Frequency. It is the result of mixing the RF with a local oscillator, LO. So, no, it isn't sharing an antenna. On Sat, Mar 9, 2024, 15:39 JHR wrote: Please help me understand how the IF OUT works on an Elecraft radio. Is it the same thing as sharing the antenna with a T/R switch, or does it tap the RF processing chain later down the line. Does the IF OUT merely share the antenna, or does it come later in the circuit - are there any practical reasons why one is better than the other? I presume the IF OUT is better, but wonder why. [It matters and will settle a bet who eats steak and who eats hot dog.] Thanks in advance K8JHR __ 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 Message delivered tok1ep.l...@gmail.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 Message delivered tok6dg...@gmail.com -- This email has been checked for viruses by AVG antivirus software. www.avg.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] IF OUT - Same as just sharing the antenna?
IF means Intermediate Frequency. It is the result of mixing the RF with a local oscillator, LO. So, no, it isn't sharing an antenna. On Sat, Mar 9, 2024, 15:39 JHR wrote: > Please help me understand how the IF OUT works on an Elecraft radio. Is > it the same thing as sharing the antenna with a T/R switch, or does it > tap the RF processing chain later down the line. Does the IF OUT merely > share the antenna, or does it come later in the circuit - are there any > practical reasons why one is better than the other? I presume the IF > OUT is better, but wonder why. > > [It matters and will settle a bet who eats steak and who eats hot dog.] > > Thanks in advance K8JHR > __ > 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 > Message delivered to k1ep.l...@gmail.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 Message delivered to arch...@mail-archive.com
[Elecraft] IF OUT - Same as just sharing the antenna?
Please help me understand how the IF OUT works on an Elecraft radio. Is it the same thing as sharing the antenna with a T/R switch, or does it tap the RF processing chain later down the line. Does the IF OUT merely share the antenna, or does it come later in the circuit - are there any practical reasons why one is better than the other? I presume the IF OUT is better, but wonder why. [It matters and will settle a bet who eats steak and who eats hot dog.] Thanks in advance K8JHR __ 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 Message delivered to arch...@mail-archive.com
