Lyra Kleos & Jean Hiraga's Pre-Pre-Amp (from Magazine "L'AUDIOPHILE")
A good friend of mine would like to operate this cartridge under
Lyra Kleos Phono Cartridge | Analog LP + MC Cartridge
Lyra Kleos - Kleos bedeutet „Ruhm“ - FIDELITY online
Mein Lyra Kleos SL ist da - mein Gott, was fur ein Erlebnis !! - Seite 5 - Tonabnehmer und Tonarme - Analogue Audio Association
with this moving coil head amp, described in English under
Project | Homebuilt Hi-Fi - A user submitted image showcase of high quality home built hi-fi components.
Hiraga MC Preamp
https://web.archive.org/web/20110106161058/http://diy-audio-world.com/HiragaPrepre.htm
https://www.lencoheaven.net/forum/index.php?topic=12916.0
http://leachlegacy.ece.gatech.edu/headamp/
and in German under
https://www.rstaudio.de/mc1-hiraga-mc-vorvorverstaerker/
http://www.stereoxl.de/images/PDFRezensionen/analog_2013_1_58 - 63_Der PrePre_Hiraga.pdf.pdf
http://methe-family.de/phonopre.htm
https://www.analog-forum.de/wbboard...nehmer-in-basisschaltung-wie-hiraga-mc-pream/
https://www.analog-forum.de/wbboard/index.php?thread/39811-hiraga-prepre/&pageNo=6
https://www.analog-forum.de/wbboard...nehmer-in-basisschaltung-wie-hiraga-mc-pream/
https://www.analog-forum.de/wbboard/index.php?thread/116012-stromversorgung-für-le-prepre/
https://www.analog-forum.de/wbboard...21-hiraga-le-prepre-für-niederohmige-systeme/
https://www.analog-forum.de/wbboard/index.php?thread/95290-mc-prepre-im-selbstbau/
https://www.audiovintage.fr/leforum/viewtopic.php?t=36238
According the schematic there is no capacitor between the cartridge coils and the emitter (comon base) input.
This means, there is a certain risk that could be caused an issue by residual DC and noise by switch-on.
Maybe there are countermeasures (as an extension of Hiraga's circuit) to avoid resp prevent such issues.
Thank you very much for advices.
Check out in this case this threads:
DC Coupling for MC Cartridges - how much error voltage before coil damaging
Audio Research MCP 33
Allowable DC Current for a Phono Cartridge
A good friend of mine would like to operate this cartridge under
Lyra Kleos Phono Cartridge | Analog LP + MC Cartridge
Lyra Kleos - Kleos bedeutet „Ruhm“ - FIDELITY online
Mein Lyra Kleos SL ist da - mein Gott, was fur ein Erlebnis !! - Seite 5 - Tonabnehmer und Tonarme - Analogue Audio Association
with this moving coil head amp, described in English under
Project | Homebuilt Hi-Fi - A user submitted image showcase of high quality home built hi-fi components.
Hiraga MC Preamp
https://web.archive.org/web/20110106161058/http://diy-audio-world.com/HiragaPrepre.htm
https://www.lencoheaven.net/forum/index.php?topic=12916.0
http://leachlegacy.ece.gatech.edu/headamp/
and in German under
https://www.rstaudio.de/mc1-hiraga-mc-vorvorverstaerker/
http://www.stereoxl.de/images/PDFRezensionen/analog_2013_1_58 - 63_Der PrePre_Hiraga.pdf.pdf
http://methe-family.de/phonopre.htm
https://www.analog-forum.de/wbboard...nehmer-in-basisschaltung-wie-hiraga-mc-pream/
https://www.analog-forum.de/wbboard/index.php?thread/39811-hiraga-prepre/&pageNo=6
https://www.analog-forum.de/wbboard...nehmer-in-basisschaltung-wie-hiraga-mc-pream/
https://www.analog-forum.de/wbboard/index.php?thread/116012-stromversorgung-für-le-prepre/
https://www.analog-forum.de/wbboard...21-hiraga-le-prepre-für-niederohmige-systeme/
https://www.analog-forum.de/wbboard/index.php?thread/95290-mc-prepre-im-selbstbau/
https://www.audiovintage.fr/leforum/viewtopic.php?t=36238
According the schematic there is no capacitor between the cartridge coils and the emitter (comon base) input.
This means, there is a certain risk that could be caused an issue by residual DC and noise by switch-on.
Maybe there are countermeasures (as an extension of Hiraga's circuit) to avoid resp prevent such issues.
Thank you very much for advices.
Check out in this case this threads:
DC Coupling for MC Cartridges - how much error voltage before coil damaging
Audio Research MCP 33
Allowable DC Current for a Phono Cartridge
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What is the maximum permissible voltage drift (in order to offset adjust)?
And what is the best approach against DC and switch-on pops on cartridge coils, if one want to use Jean Hiraga's Pre-Pre-Amp ?
Thanks for upload an appropriate circuit.
The mentioned projects in post #1 don't use any protect steps for the DC connected MC cartridge.
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