June 04, 2023, 08:24:49 PM

Author Topic: S3Xline  (Read 804 times)

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Offline Tom-s

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« on: October 24, 2020, 11:57:53 AM »
My first steps into the X of eXperimentation led me to this.

Inspired by the Mainline spud headphone amplifier; I rebuild my S3X with E55L tubes (triode connected).

See here:

It's a very popular tube to use as a spud, with a large following in France.

It works like a charm on the first try! Only missing some bass (OPT's now wired for only 2 Ohm, need to change this). And i still need to check it with a scope (also to double check for oscillation).
« Last Edit: October 24, 2020, 12:08:28 PM by Tom-s »

Offline Paul Birkeland

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Re: S3Xline
« Reply #1 on: October 24, 2020, 03:25:48 PM »
That's a nice linear tube, but man are they pricey!
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Tom-s

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Re: S3Xline
« Reply #2 on: October 26, 2020, 10:44:56 AM »
E55L is indeed very linear and sometimes expensive. I was lucky to find a good number in my collection.

For those interested. I've tried my hand at a schematic.

Any suggestions (by the BH crew) for improvements for this amplifier? Do let me know!

I started with the a very basic setup as a first try.

With the HD800's it's perfectly silent and has adequate power (even from the 2Ohm tap); a perfect single watt.

I enjoy it a lot! Here it is with Mullard Mitcham factory E55L's. I prefer these over the Amperex USA build E55L's for now.
Those are the only two plants for E55L I know about. That's it for tube rolling...