From 88170f9ba8e0eec3facd3bfd3ca8a125b7e52c31 Mon Sep 17 00:00:00 2001 From: mattbk Date: Wed, 3 Jul 2024 15:00:38 -0500 Subject: [PATCH] Fix MP3 link in Appendix --- Open-Headset-Interconnect-Standard.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Open-Headset-Interconnect-Standard.md b/Open-Headset-Interconnect-Standard.md index 0900b5c..51f3c70 100644 --- a/Open-Headset-Interconnect-Standard.md +++ b/Open-Headset-Interconnect-Standard.md @@ -409,7 +409,7 @@ This simple design is included in the Standard for all to use with no obligation * Q1: S9013, or similar NPN BJT transistor. * Tests were performed (by Mark Smith in 2022-08) using an S9013 transistor, but nearly any small signal NPN BJT should work. For example, a 2N3904 (through hole) or MMBT3904 (surface mount) should work equally well. -An example recording of audio through this microphone preamp design is [here](https://halibut-electronics.github.io/Open-Headset-Interconnect-Standard/2022-08-18%20First%20Test%20Of%205%20Component%20Preamp.mp3). +An example recording of audio through this microphone preamp design is [here](https://open-headset-interconnect-standard.github.io/ohis/2022-08-18%20First%20Test%20Of%205%20Component%20Preamp.mp3). This circuit is only a slight modification of a conventional common emitter transistor amplifier, similar to what's analyzed [here](http://www.guitarscience.net/calcs/ce.htm). The difference being that we are using the 2.2k ohm resistor in the Radio side (upper right corner above) as the collector resistor. This means the top-side base resistor (R1 above) connects to the output, not to Vcc. @@ -419,4 +419,4 @@ This circuit is only a slight modification of a conventional common emitter tran ## 7.2. OHIS to Dynamic Microphone Pad -**TODO** Document a 10 to 15dB pad to bring Electret level down to Dynamic level. Also block DC. \ No newline at end of file +**TODO** Document a 10 to 15dB pad to bring Electret level down to Dynamic level. Also block DC.