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easy_cv [2016/08/14 00:39] phatline [Example for a Filterbank] |
easy_cv [2016/08/22 02:03] (current) phatline [VCA-VCF] |
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the VCF are a 303 18dB for the 24db Filter it will be a SSM2044, where bords are available.\\ | the VCF are a 303 18dB for the 24db Filter it will be a SSM2044, where bords are available.\\ | ||
- | === Original Schematics 303 - VCA-VCF === | ||
- | {{ :phatline:VCA-VCF-303-orginal.png?direct&900 |}} | ||
In order to not use those **overprized MATCHED-PAIR-TRANSISTORS** (over 2€ on the cheapest place) i have to use standart Transistors and make a **VBE-MATCH** on my own, i have already a PCB from here - to measure the transistors with a Multimeter: | In order to not use those **overprized MATCHED-PAIR-TRANSISTORS** (over 2€ on the cheapest place) i have to use standart Transistors and make a **VBE-MATCH** on my own, i have already a PCB from here - to measure the transistors with a Multimeter: | ||
https://midisizer.com/other/vbe-matching/ | https://midisizer.com/other/vbe-matching/ | ||
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{{:phatline:easy-cv-filterbox.png|}} | {{:phatline:easy-cv-filterbox.png|}} | ||
+ | Filterbox OneChannel > first idea of Block-shematic: | ||
+ | {{:phatline:filterbank-channelstrip.jpg|}} | ||
===== General Design ===== | ===== General Design ===== | ||