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Old 12th October 2007, 09:37 PM   #1
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Default 6AG7 UL Curves

does anybody have them, or have the equipment to trace them out? Standard 40% winding ratio...
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Old 14th October 2007, 08:55 AM   #2
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Default 6AG7 UL Curves

Not sure if this is what you're after?

http://www.r-type.org/pdfs/6ag7.pdf

Cheers, James.
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Old 14th October 2007, 05:34 PM   #3
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Thanks, but those are regular pentode curves..
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Old 15th October 2007, 08:41 PM   #4
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Hi,

tracing UL-curves is not a big deal per se, but picking a suitable operation point for any UL ratio in advance (before doing the tracing) is. But some experience helps, especially if one has the trioded curves already.

Sadly, I donīt have any thrustworthy 6AG7 (or 6AK7) in the drawers.

Regards,

Tom

P.S: Among others, some of my UL tracings you can find here. F.e, have a look at the ECL82 set of UL tracings to see how critical the OP (Ea, Ia, Eg1) can be when it comes to chose on an UL ratio.
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Old 15th October 2007, 11:20 PM   #5
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Thanks for the very informative page! I didn't know you were Tom - you post on AA now and then, right? Anyway I'm kind of putting aside the 6AG7 project at the moment, in favor of a PP 6S19P amplifier.. As good as pentodes in UL can sound, I've been bitten by the triode bug.

The problem is, I should probably load up on 6S19P's before finishing this project, because as far as I know, this will have been the first project to implement 6S19P's in push-pull accessible by Google. And that means price hiking! Within a year or so I've seen the prices of those Russian PIO caps skyrocket on eBay, they know what they're doing
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Old 16th October 2007, 05:15 AM   #6
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Quote:
I didn't know you were Tom - you post on AA now and then, right?
Sorry, no - I donīt even know what AA is, except for a battery size

Tom
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Old 16th October 2007, 05:17 AM   #7
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audio asylum? maybe I'm mistaken.. or is it audiokarma? no big deal.
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