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Old 28th November 2012, 10:45 PM   #1
aldovan is offline aldovan  Brazil
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Default 6AS6 is useful for audio ?

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If I connect the G3 of the 6AS6 to cathode , this pentode can work fine for audio pre-amplification ?

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Aldovan
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Old 28th November 2012, 10:58 PM   #2
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The spec sheet mentions this specifically: connect G3 to the cathode, and use as any other small signal pentode. Whether or not it works as a decent audio voltage amp remains to be seen.
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Old 28th November 2012, 10:58 PM   #3
TheGimp is offline TheGimp  United States
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It is a sharp cutoff pentode, so it should be possible. How linear it will be is up for grabs.
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Old 28th November 2012, 11:07 PM   #4
AJT is offline AJT  Philippines
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yes...connect G2 to plate and you have a triode...
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Old 28th November 2012, 11:27 PM   #5
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Old 28th November 2012, 11:36 PM   #6
aldovan is offline aldovan  Brazil
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Quote:
Originally Posted by Tony View Post
yes...connect G2 to plate and you have a triode...
Tony

Yes, I want use as triode.

Aldovan
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Old 29th November 2012, 02:10 AM   #7
wa2ise is offline wa2ise  United States
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Quote:
Originally Posted by aldovan View Post
If I connect the G3 of the 6AS6 to cathode , this pentode can work fine for audio pre-amplification ?
You can make it into an electronic volume control if you connect G3 to a variable source of DC, like 0 to -18V or so. See the schematic below:
Click the image to open in full size.
pw2.netcom.com/~wa2ise/radios/elvctube.jpg
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Old 29th November 2012, 10:13 AM   #8
DF96 is offline DF96  England
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I believe the 6AS6 is essentially a 6AK5/EF95 with a tighter pitch on g3. That would mean that you have to be careful about grid stoppers etc. as it is happy amplifying/oscillating at UHF.
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