Need Schematic for 12 Volt Tube Buffer

becki200 · 16th January 2009, 08:46 PM

Hi everybody, i hope you can help me. I need a schematic for a tube buffer with a gain of 0 dB. Id like to use the 6AK5/EF 95.
It doesnt have to be a line stage, just want to add some tube sound. Thx Thorsten

nigelwright7557 · 16th January 2009, 10:04 PM

Why not use a soft limiter ?
Same sound as a tube but much cheaper and less lethal to build !

becki200 · 17th January 2009, 02:12 PM

Hi Nigel, what is a soft limiter? I dont want to build a buffer with lethal voltages, the EF95 really works with 12 Volt. And it will cost a few Euros 2 Tubes 2 Sockets some resistors and some caps
maybe 10 Euros will do. Best regards Thorsten

nigelwright7557 · 17th January 2009, 08:42 PM

Quote:

Originally posted by becki200
Hi Nigel, what is a soft limiter? I dont want to build a buffer with lethal voltages, the EF95 really works with 12 Volt. And it will cost a few Euros 2 Tubes 2 Sockets some resistors and some caps
maybe 10 Euros will do. Best regards Thorsten

If your valve works with 12 volts then I would use that.

A soft limiter basically rounds off the top of the waveform instead of squaring it off.

Sadly I cant find the cct diagram of the one I used to use.
But it was an opamp amplifier with two transistors in the feedback loop with a rounding off level set by a pot.

16th January 2009, 08:46 PM	#1
becki200 diyAudio Member Join Date: Dec 2008	Need Schematic for 12 Volt Tube Buffer Hi everybody, i hope you can help me. I need a schematic for a tube buffer with a gain of 0 dB. Id like to use the 6AK5/EF 95. It doesnt have to be a line stage, just want to add some tube sound. Thx Thorsten

16th January 2009, 10:04 PM	#2
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	Why not use a soft limiter ? Same sound as a tube but much cheaper and less lethal to build ! __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

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17th January 2009, 02:12 PM	#3
becki200 diyAudio Member Join Date: Dec 2008	Hi Nigel, what is a soft limiter? I dont want to build a buffer with lethal voltages, the EF95 really works with 12 Volt. And it will cost a few Euros 2 Tubes 2 Sockets some resistors and some caps maybe 10 Euros will do. Best regards Thorsten

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