Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Sound\s+Card\s+Impedance\s*$/>

Return to KLUBNL.PL main page

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Sound\s+Card\s+Impedance\s*$/: 7 ]

Total 7 documents matching your query.

1. LF: Sound Card Impedance (score: 1): Author: "Ken" <[email protected]>; Date: Wed, 15 Dec 2010 21:11:24 +0100; Hello all. Does anyone know the approximate impedance of the mic input jack on a pc sound card. 73. Ken M0KHW; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-12/msg00095.html (10,189 bytes)
2. Re: LF: Sound Card Impedance (score: 1): Author: Stefan Schäfer <[email protected]>; Date: Thu, 16 Dec 2010 14:46:22 +0100; Johan, Am 16.12.2010 13:26, schrieb Johan H. Bodin: I measured the input impedance of the mic input on a Dell laptop: AC input impedance: 4.3 kOhms (-6dB with 4k3 resistor in series) Mic bias voltage; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-12/msg00202.html (10,211 bytes)
3. Re: LF: Sound Card Impedance (score: 1): Author: "Johan H. Bodin" <[email protected]>; Date: Thu, 16 Dec 2010 13:26:54 +0100; I measured the input impedance of the mic input on a Dell laptop: AC input impedance: 4.3 kOhms (-6dB with 4k3 resistor in series) Mic bias voltage: +3.8V (open circuit) Output current: 809uA (shorte; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-12/msg00498.html (9,634 bytes)
4. RE: LF: Sound Card Impedance (score: 1): Author: Rik Strobbe <[email protected]>; Date: Thu, 16 Dec 2010 14:13:03 +0100; Johan, at what frequency did you measure. I have measured a significant C (up to some nF) in parallel to R at the input of some soundcards. 73, Rik ON7YD - OR7T ______________________________________; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-12/msg00633.html (10,881 bytes)
5. Re: LF: Sound Card Impedance (score: 1): Author: "Clemens Paul" <[email protected]>; Date: Thu, 16 Dec 2010 21:05:55 +0100; Rik, in parallel to R at the input of some soundcards. I can confirm this. I've digged out a VNA plot (starting at 5kHz) of my onboard soundcard. You can see that at 10kHz Z is around 3kOhm, R 2,5kOh; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-12/msg00674.html (12,666 bytes)
6. Re: LF: Sound Card Impedance (score: 1): Author: John Bruce McCreath <[email protected]>; Date: Wed, 15 Dec 2010 16:21:32 -0500; Hi Ken, I've been told that it varies from board to board and is between 1K and 10K. Wish I had a better answer for you. 73, J.B., VE3EAR LowFER Beacon "EAR" 188.830 kHz. QRSS30 EN93dr; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-12/msg00803.html (9,132 bytes)
7. Re: LF: Sound Card Impedance (score: 1): Author: Daniele Tincani <[email protected]>; Date: Thu, 16 Dec 2010 05:59:00 -0800 (PST); Hi LF, very interesting info. However, often the line input of a sound card is used to connect a pre-amp (rather than the mic input which is more prone to overload). Am I wrong? Best regards Daniele; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-12/msg01074.html (12,088 bytes)

Current List: 1 - 7
Page: [1]