Re: [Elecraft] Microphone Setup Confusion
On 5/16/2023 6:40 PM, Alan Geller via Elecraft wrote: Is what Elecraft calls mike “bias” in the K3 and K3s Owners handbooks Equivalent to the “48 volt ghost voltage” required for condenser mikes et al In the broadcast and music industry ? Yes, both provide power for active electronics that boost the mic element's output and make an impedance transformation (the mic element is VERY high Z) to drive the mic preamp (in the case of the unbalanced mics used in ham radio), or to drive a long length of cable (for balanced pro mics). The two systems are very different though -- the bias circuitry used for unbalanced electret mic elements won't work for balanced pro mics, and the "phantom power," a positive DC voltage applied equally to both sides of the balanced cable (pins 2 and 3) with negative to the cable shield (pin 1) won't work with unbalanced electret elements. Those pro mics have a gain stage and low-Z balanced line driver built into them, which operates from phantom power. Indeed, there are unbalanced, capsule-only versions of miniature pro mics that are used with wireless mics, using the same unbalanced "bias" method we use in ham radio, and the bias is provided by the wireless transmitter. This is what you're seeing with clip-on mics worn by on-air people, and by musicians with clip-on mics. 73, Jim K9YC __ 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] Microphone Setup Confusion
The mic bias is +3.3 V on the tip. On the KX3, there is also a logic level DC voltage on the ring. This is not as clean as the mic bias and can cause some noise on mics that short those. You can split out those signals with a TRS plug or a stereo-to-mono splitter. See this blog post (from me) for details. https://observer.wunderwood.org/2015/08/16/yamaha-cm500-headset-with-ptt-on-elecraft-kx3/ Phantom power for studio mics is quite different. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On May 16, 2023, at 6:40 PM, Alan Geller via Elecraft > wrote: > > Is what Elecraft calls mike “bias” in the K3 and K3s Owners handbooks > Equivalent to the “48 volt ghost voltage” required for condenser mikes et al > In the broadcast and music industry ? > > It is mentioned that “mike bias” needs to to be turned on for condenser type > mikes > But off for dynamic types which is also equivalent for the more common > Term “48 volt ghost voltage” > > Thanks for any help > > Alan/K6ADG > __ > 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 wun...@wunderwood.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] Microphone Setup Confusion
Bias is a much lower voltage than phantom power. John KK9A Alan Geller K6ADG Is what Elecraft calls mike "bias" in the K3 and K3s Owners handbooks Equivalent to the "48 volt ghost voltage" required for condenser mikes et al In the broadcast and music industry ? It is mentioned that "mike bias" needs to to be turned on for condenser type mikes But off for dynamic types which is also equivalent for the more common Term "48 volt ghost voltage" Thanks for any help Alan/K6ADG __ 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] Microphone Setup Confusion
No. "Elecraft bias" is a low voltage applied to electret mics. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County Alan Geller via Elecraft wrote on 5/16/2023 6:40 PM: Is what Elecraft calls mike “bias” in the K3 and K3s Owners handbooks Equivalent to the “48 volt ghost voltage” required for condenser mikes et al In the broadcast and music industry ? It is mentioned that “mike bias” needs to to be turned on for condenser type mikes But off for dynamic types which is also equivalent for the more common Term “48 volt ghost voltage” Thanks for any help Alan/K6ADG __ 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 k6dg...@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
[Elecraft] test sri cu at dayton
__ 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] Microphone Setup Confusion
Is what Elecraft calls mike “bias” in the K3 and K3s Owners handbooks Equivalent to the “48 volt ghost voltage” required for condenser mikes et al In the broadcast and music industry ? It is mentioned that “mike bias” needs to to be turned on for condenser type mikes But off for dynamic types which is also equivalent for the more common Term “48 volt ghost voltage” Thanks for any help Alan/K6ADG __ 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] KPA500 Fan Question
"The issue: The fan comes on in a very short time - less than 20 seconds - and the temp display runs up to 50+ degrees. If I start calling CQ or get into a QSO, it doesn’t take long for the temp to show over 60 degrees and the fan is running at max." Max fan speed of a KPA500 is setting 6. With a PA temperature between 60 and 65 deg C the fan should be running at level 3. Transition to level 4 is at about 65 deg C on my KPA500. It has to get quite a bit hotter that 60 deg C for the fan to be running "at max". What is making the fan come on in a very short time before you start calling CQ? Are you saying the fan runs after you power the KPA500 but before you transmit? If so, check that KPA500 is not being continuously keyed. That will cause enough PA dissipation to run the fans even with no RF output. Andy, k3wyc __ 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] K3/0
Howdy all, I have a spare K3 that I am considering using it in remote from my second QTH, with much better location to the west.! I guess I need the K3/0 mini remote to make it go so, the question is if anybody out there have one of those systems that due to a change in his configuration doesn’t need it anymore, so I could maybe get it. Thanks all, 73, Josep EA6BF BUG #256 - CWops #3072 - FOC #2182 (ex 1724) __ 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
