single endedtransformer coupled 6sn7 mic preamp

gurpreet · 14th February 2009, 07:32 PM

Hello

I am designing a mic preamp, having all the stages transformer coupled and single ended, without any negative feedback.
I am planning to use 3 stages of parallel 6sn7, as i like its sweet and smooth sound. Has anyone ever tried this type of configuration and any problem related to this type of design.

Gurpreet

Gordy · 14th February 2009, 08:06 PM

I have not tried that configuration, however a friend had decent results with a Gyraf Audio mic pre. For info on that (and a schematic) go here and look in the diy-projects section for G9 micpre:
http://www.gyraf.dk/index.html

Good luck,
G.

korneluk · 15th February 2009, 08:18 AM

You can try the Aikido mic project from Boozhound Laboratories:

http://boozhoundlabs.com/microphone-preamp-aikido/

Other mic projects:

http://boozhoundlabs.com/microphone-preamp/

http://boozhoundlabs.com/microphone-preamp-2/

Enjoy,

gurpreet · 15th February 2009, 08:55 AM

i have made those types of preamps but i want to try this all transformer coupled preamp. I am little confused for selecting the right tube and transformers. I have tried the circuit with sowter interstage, line output and microphone input transformer. Its sounding quite close to what i want. But the preamp is little thick sounding in the midrange i don,t know if this is due to the transformer or the tube.
Has anybody tried the lundahls.

Gurpreet

14th February 2009, 07:32 PM	#1
gurpreet diyAudio Member Join Date: Feb 2009	single endedtransformer coupled 6sn7 mic preamp Hello I am designing a mic preamp, having all the stages transformer coupled and single ended, without any negative feedback. I am planning to use 3 stages of parallel 6sn7, as i like its sweet and smooth sound. Has anyone ever tried this type of configuration and any problem related to this type of design. Gurpreet

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14th February 2009, 08:06 PM	#2
Gordy diyAudio Member Join Date: Nov 2006	I have not tried that configuration, however a friend had decent results with a Gyraf Audio mic pre. For info on that (and a schematic) go here and look in the diy-projects section for G9 micpre: http://www.gyraf.dk/index.html Good luck, G.

15th February 2009, 08:18 AM	#3
korneluk diyAudio Member Join Date: Jan 2005 Location: South Florida	You can try the Aikido mic project from Boozhound Laboratories: http://boozhoundlabs.com/microphone-preamp-aikido/ Other mic projects: http://boozhoundlabs.com/microphone-preamp/ http://boozhoundlabs.com/microphone-preamp-2/ Enjoy,

15th February 2009, 08:55 AM	#4
gurpreet diyAudio Member Join Date: Feb 2009	i have made those types of preamps but i want to try this all transformer coupled preamp. I am little confused for selecting the right tube and transformers. I have tried the circuit with sowter interstage, line output and microphone input transformer. Its sounding quite close to what i want. But the preamp is little thick sounding in the midrange i don,t know if this is due to the transformer or the tube. Has anybody tried the lundahls. Gurpreet

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