Description
Preamplifier RagnaMos 1.5
This preamplifier is built around a small MOSFET, the BS170. The current source is composed of a JFET 2SK170. The gain is just under 4x. The power supply is filtered by a simulated inductor and then divided into two capacitance multipliers. The input and output decoupling capacitors are of audio-grade quality.
This preamplifier is very dynamic with a slightly warmer tone and a very detailed sound.
Schematic and Layout

Apr 24,2023
1,694 views
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Preamplifier RagnaMos 1.5
Mosfet preamplifier srpp
1694
4
3
Published: Apr 24,2023
Standard PCB
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File Last Updated: 2023/04/25 (GMT+8)
File update record
2023-04-2506:17:54
Gerber file is updated.
2023-04-2506:14:29
Gerber file is updated.
2023-04-2506:11:54
Gerber file is updated.
2023-04-2506:07:28
Gerber file is updated.
2023-04-2419:22:53
Gerber file is updated.
2023-04-2419:20:07
Gerber file is updated.
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Engineer Aug 06,2024
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Engineer Jun 02,2023
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Giuseppe Garufi May 18,2023
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Engineer May 12,2023
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The gainclone LM3875 The Gainclone LM3875https://phonoclone.com/diy-gc.html
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Preamplifier RagnaMos 1.5 This preamplifier is built around a small MOSFET, the BS170. The current source is composed of a JFE...
-
LM1875 high current +TIP35+TIP36 This amplifier is based on the LM1875 integrated circuit, which respectively drives a TIP35 and a TI...
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LM3875 Amplifier This amplifier is based on the LM3875. The signal ground has been separated from the GND, and a high...
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Amplifier MX5OnisA (THE BLAMELESS AMPLIFIER CONCEPT) Questa versione di amplificatore è molto simile al "THE BLAMELESS AMPLIFIER CONCEPT"http://www.dougl...
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Amplifier LoniTip100 Questo amplificatore è il 2° della linea LoniTip100ha una potenza di 100w rmsalimentazione +-45vrego...
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Amplifier Loni Tip50 Questo amplificatore, il più piccolo LoniTip50ha una potenza di 50w rmsalimentazione +-35vregolazion...
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