Re: [Elecraft] OT: 2 port 50 ohm RX splitters ---TNX
I Purchased 5 used Mini Circuits 3dB splitters from China for about $28 on eBay including shipping from half way round the world. 5-500 MHZ with SMA connectors Model ZFSC-2-1 Lots of uses for them, splitting 10MHz standards, dual receivers on single antenna etc. I did previously build a 3dB hybrid from a design in an ARRL handbook many years ago when I wanted to do some 2 tone testing on a receive converter, but with the availability of good quality surplus nowadays it isn't worth the time and effort! David Anderson GM4JJJ On 1 Jan 2014, at 14:15, als...@nc.rr.com wrote: Thanks guys. Looks like the W8JI design is easiest to build. Mouser has the binocular cores needed. 73 de Brian/K3KO als...@nc.rr.com wrote: A while back there were some postings on recommended commercial 50 ohm two port splitters for receiver use. Can't find the postings. Cheaper is better. Loss for my application is relatively unimportant since they will be signal generator driven and followed by step attenuators. Simple HB designs may also be of interest. Kits would be ideal. Of course the K3 has one built in to route the main RX antenna to both the main and sub rx. 73 de Brian/K3KO __ 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] OT: 2 port 50 ohm RX splitters ---TNX
Thanks guys. Looks like the W8JI design is easiest to build. Mouser has the binocular cores needed. 73 de Brian/K3KO als...@nc.rr.com wrote: A while back there were some postings on recommended commercial 50 ohm two port splitters for receiver use. Can't find the postings. Cheaper is better. Loss for my application is relatively unimportant since they will be signal generator driven and followed by step attenuators. Simple HB designs may also be of interest. Kits would be ideal. Of course the K3 has one built in to route the main RX antenna to both the main and sub rx. 73 de Brian/K3KO __ 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] OT: 2 port 50 ohm RX splitters ---TNX
Jack Smith has a kit - everything except case and connectors: http://cliftonlaboratories.com/z10050a_3_db_hybrid.htm 73, ... Joe, W4TV On 1/1/2014 9:15 AM, als...@nc.rr.com wrote: Thanks guys. Looks like the W8JI design is easiest to build. Mouser has the binocular cores needed. 73 de Brian/K3KO als...@nc.rr.com wrote: A while back there were some postings on recommended commercial 50 ohm two port splitters for receiver use. Can't find the postings. Cheaper is better. Loss for my application is relatively unimportant since they will be signal generator driven and followed by step attenuators. Simple HB designs may also be of interest. Kits would be ideal. Of course the K3 has one built in to route the main RX antenna to both the main and sub rx. 73 de Brian/K3KO __ 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] OT: 2 port 50 ohm RX splitters ---TNX
I would note that if you intend to use combiners with signal generators for intermodulation measurements care has to be taken with core selection if high performance amplifiers are to be evaluated. After a great deal of experimentation, the limit of my 2nd and 3rd order IMD measurement capability is +100 dBm (2nd order) and +55 dBm (3rd order) but that required evaluating a half dozen or more 3 dB combiners and quite a few other components as well. The best of my Norton amplifiers press against these limits. Some discussion and measured data for various 3 and 6 dB combiners at my web site: http://www.cliftonlaboratories.com/6_db_hybrid_combiner.htm http://www.cliftonlaboratories.com/Documents/Notes%20on%20Building%20a%20Z10050A.pdf I've modified my test equipment setup since the first page link was written - presently use a pair of HP 8657A signal generators and an HP 8568B spectrum analyzer. But the ZHL-3A amplifiers remain in use and are essential. Jack K8ZOA On 1/1/2014 9:35 AM, Joe Subich, W4TV wrote: Jack Smith has a kit - everything except case and connectors: http://cliftonlaboratories.com/z10050a_3_db_hybrid.htm 73, ... Joe, W4TV On 1/1/2014 9:15 AM, als...@nc.rr.com wrote: Thanks guys. Looks like the W8JI design is easiest to build. Mouser has the binocular cores needed. 73 de Brian/K3KO als...@nc.rr.com wrote: A while back there were some postings on recommended commercial 50 ohm two port splitters for receiver use. Can't find the postings. Cheaper is better. Loss for my application is relatively unimportant since they will be signal generator driven and followed by step attenuators. Simple HB designs may also be of interest. Kits would be ideal. Of course the K3 has one built in to route the main RX antenna to both the main and sub rx. 73 de Brian/K3KO __ 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 __ 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
