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12au7 phase splitter/driver advice
12au7 phase splitter/driver advice
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Old 27th July 2019, 10:36 AM   #1
sumotan is offline sumotan  Indonesia
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Default 12au7 phase splitter/driver advice

Hi Guys,
My Primaluna Dialgue uses the above, was wondering if you guys can recommend a good tube for this application. Was thinking of trying out the E80CC/6085 but without amplifier schematics am not sure if the PS can handle
the extra current. Yes wrote to PrimaLuna but zero reply.

Thanks in advance
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Old 27th July 2019, 01:09 PM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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Extra 300mA to find.
Why not try a 12AY7
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Old 27th July 2019, 01:27 PM   #3
sumotan is offline sumotan  Indonesia
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I know nuts about other series accept the 12au7 & E80CC. Hence seeking for advice. Thanks Jon for the advice. Im also curious why Primaluna uses 2x 12ax7 in gain stage & 2 x 12au7 in phase splitter/driver stage. Do wonder if they parallel up the tubes. Have not open up bottom plate to view yet.

Thank again Jon
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Old 28th July 2019, 02:22 AM   #4
ejp is offline ejp  Australia
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Have you considered a 12AU7? What exactly is your objective?
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Old 28th July 2019, 02:54 AM   #5
sumotan is offline sumotan  Indonesia
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Hi EJP,
It's about time to change I think. Hence trying to get advice to see if there's better for this application. Manual notes for replacement : 12AU7: ECC82, ECC802S, E82CC, 5814, 6189, CV4003. If I follow which will be a better choice ?

Thanks again

Ooops for got EJP, would like to get more ooomph if possible.

Thks
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Old 28th July 2019, 03:00 AM   #6
ejp is offline ejp  Australia
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'Oomph' is not a well-defined technical term. Please elaborate, or define. Gain? Current? Voltage swing? ...

Last edited by ejp; 28th July 2019 at 03:01 AM. Reason: Typo
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Old 28th July 2019, 03:10 AM   #7
sumotan is offline sumotan  Indonesia
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Since it is a driver, I would like to get more out of it like dynamics etc. My experience is only with E80CC/6085. I would use this tube without question if possible but without schematics or reply from Primaluna, Short of killing the amp, I've got to stay on the safe side.

Many thanks
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Old 28th July 2019, 03:43 AM   #8
wiseoldtech is online now wiseoldtech  United States
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Quote:
Originally Posted by JonSnell Electronic View Post
Extra 300mA to find.
Why not try a 12AY7

I agree on the 12AY7 too.
I use them in an amp I built and they can sound sweet.
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Old 28th July 2019, 03:47 AM   #9
45 is offline 45  Italy
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Quote:
Originally Posted by sumotan View Post
I know nuts about other series accept the 12au7 & E80CC. Hence seeking for advice. Thanks Jon for the advice. Im also curious why Primaluna uses 2x 12ax7 in gain stage & 2 x 12au7 in phase splitter/driver stage. Do wonder if they parallel up the tubes. Have not open up bottom plate to view yet.

Thank again Jon
mmmh....If 2x 12ax7 are you sure the phase splitter is done with the 12AU7? 2 tubes of each type sounds more like an input LTP phase splitter with the 12AX7 and a differential drive with the 12AU7. In such case you might get an improvement with the E80CC only if the power tubes need large signal and/or the 12AU7s in your amp are poor quality.
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Old 28th July 2019, 03:52 AM   #10
sumotan is offline sumotan  Indonesia
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12Ax7 is gain stage, 12au7 is driver.

Thks 45
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