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Old 22nd September 2015, 03:22 PM   #1
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Smile single channel 12ax7 , F-2B, cathode follower using 5670

I've finished building a single channel F-2B using a 12ax7, I have some 5670 tubes laying around and I was wondering, if I could use one of these as a cathode follower/buffer? What would be the best cathode follower design using a 5670 tube that will buffer the output a bit and increase the gain a tad.

Thanx so much
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Old 23rd September 2015, 10:21 AM   #2
DF96 is offline DF96  England
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What is an F-2B? If it is single channel, should this thread perhaps be in the Instruments & Amps section?
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Old 23rd September 2015, 01:25 PM   #3
mike567 is offline mike567  United States
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Alembic F2B is used frequently used as a bass guitar preamp
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Old 23rd September 2015, 03:12 PM   #4
JMFahey is offline JMFahey  Argentina
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Yes, why not
Lower output impedance?

Increase gain?

What do you use that preamp for?
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