E88C (6DL4/ 8255), any circuit for it? - diyAudio
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Old 18th September 2004, 11:36 AM   #1
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Default E88C (6DL4/ 8255), any circuit for it?

I bought some of these triodes by mistake (overlooking the missing final "C"), and then discovered that they aren't half of E88CC as their part number might suggest....

However they seem to be very good quality tubes (and so worthwhile the effort to use them), but searching here and there couldn't find a schematic employing them.

Does anybody have a link to a schematic or a suggestion on how to use them?

Cheers

Andrea
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Old 18th September 2004, 11:55 AM   #2
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That Gm is outrageous for a triode of that gain factor

Linedriver maybe? If it's not too noisy or microphonic, how 'bout a GG mic preamp like here?

http://www3.telus.net/small_business/Geek/DynMic.png
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Old 18th September 2004, 12:22 PM   #3
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I was rather thinking about a preamp or, even better, a output stage for a TDA1541A DAC....

Which tubes (or half of) can it substitute without too many modifications?

Cheers

Andrea
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Old 18th September 2004, 01:30 PM   #4
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Hi,

Quote:
Which tubes (or half of) can it substitute without too many modifications?
The only one I know of that's "similar" is its cousin, the EC86.

If you decide on using the EC88, stay clear from too low bias voltage. This tube isn't linear in that region.

Otherwise the kinds of applications you could use it for are similar to the ones for the USSR 6C45-P.

Also keep in mind that it has multiple gridpin connections and may tend to oscillate without properly used gridstopper resistors.

A sample circuit:

EL34 SE

Cheers,
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