Help! High gain, low noise fet advice needed!

Lenin · 16th February 2002, 01:35 AM

I desperately need some recommendations for a high gain, low noise fet for a phono stage I'm pulling together.

Its made up of 2 linear gain stages, with passive eq. The gain stage topology is essentially a very simple triode type circuit. (Yep, you read that right). With just 1 device in each stage.

I'm trying to achieve extremely high MC gain (good enough for low o/p Ortofons, etc) and I'm just terrified about ensuring that in particular, the first stage is treated with the care it requires. (Hence my search for a high gain, low noise device).

I understand Toshiba fets have a decent sonic reputation . Any recommendations anyone? (Toshiba or anything else)

HarryHaller · 16th February 2002, 01:53 AM

The Toshiba 2SK170 or 2SK389 (dual). The 2SK147 is even lower noise but not in production anymore. (nobody is getting any of my stash) For more info:

www.passdiy.com

www.borbelyaudio.com

http://site.pcmagazine.com.tw/audio/parts/parts.htm (data sheets)

H.H.

16th February 2002, 01:35 AM	#1
Lenin diyAudio Member Join Date: Feb 2002 Location: London	Help! High gain, low noise fet advice needed! I desperately need some recommendations for a high gain, low noise fet for a phono stage I'm pulling together. Its made up of 2 linear gain stages, with passive eq. The gain stage topology is essentially a very simple triode type circuit. (Yep, you read that right). With just 1 device in each stage. I'm trying to achieve extremely high MC gain (good enough for low o/p Ortofons, etc) and I'm just terrified about ensuring that in particular, the first stage is treated with the care it requires. (Hence my search for a high gain, low noise device). I understand Toshiba fets have a decent sonic reputation . Any recommendations anyone? (Toshiba or anything else)

16th February 2002, 01:53 AM	#2
HarryHaller Banned Join Date: Feb 2002 Location: Dallas,Texas	Fets The Toshiba 2SK170 or 2SK389 (dual). The 2SK147 is even lower noise but not in production anymore. (nobody is getting any of my stash) For more info: www.passdiy.com www.borbelyaudio.com http://site.pcmagazine.com.tw/audio/parts/parts.htm (data sheets) H.H.

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