6AN8 Triode connection + EL 84 PP - diyAudio
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Old 1st May 2007, 12:55 PM   #1
Tobruk is offline Tobruk  Italy
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Default 6AN8 Triode connection + EL 84 PP

Hi
do you think this schematic needs some corrections ??
I thank you in adance
regards
Franco.-
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Old 1st May 2007, 09:50 PM   #2
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Fine as I can see Franco!

I presume you have checked the voltages - I do not have 6AN8 data as triode. You use this as a low gain amplifier, directly from CD etc. I presume. You could use the 6AN8 as pentode if ever more gain is desired - don't be discouraged by urban legends regarding pentode input stages.

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Old 1st May 2007, 11:08 PM   #3
rdf is offline rdf  Canada
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A resistor from the wiper pot to ground provides a good safety in case the volume control goes intermittent. I'll leave it to those who like global negative feedback ):P but the high pass frequency into the final stage seems high at >16 Hz.
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Old 2nd May 2007, 02:42 AM   #4
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Agreed Rdf - I think you have suggested that in the past?

I really have to remember that myself; good hint. Also on bias wipers, so as to take g1 full negative for the same reason.

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