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6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
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Old 14th August 2011, 04:17 PM   #1
tiefbassuebertr is offline tiefbassuebertr  Germany
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Default 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)

German's manufacturer for tube amps "Welter" use in his no longer available single ended power amplifier model "WT-500" (Welter Triode 500) a "6C33C"-based tube (WT530-S) with even exactly the same outline than the 6C33C from Ulyanov - see the pictures in the test report from German's hifi magazine "hifi exclusiv" about
The main different to the standart version is the enhanced value of the forward transconductance.
According the picture in this test report the type number is WT-530S, WT500-S or WT520-5.

The main advantage is the significantly lower demand to the gain-factor of the "front end" (VAS) stage so as it's tube.

Unfortunately this model can not be longer produce for the German manufacture "Welter" - so I have heard.

I want to know an overview from additional custom made versions of this tube in the outline of the 6C33C and the manufacturer, that produces currently this custom made versions for other companies (which develope and produce similar single ended amplifiers).

Additional I need all schematics of all Welter's "WT-500" versions (PM's you can send directly
to my e-mail address - kirschner-hifi@tiefbasswiedergabe.de)

Thank you for your efforts in advance.

Similar single ended amp (but with standart version of 6C33C and an additional 6C33C tube for voltage regulation) are the follow:
Lamm ML2.2 (Brooklyn, NY)
ML2.2 spec
Ultra High-End Audio and Home Theater Forum
Audio Federation - Audio Federation Blog Blog Archive CES 2011 - Lamm / Verity - High-end Audio Blog
Ayon Audio Spark III (Austria)
Spark III : Ayon Audio
PhaSt "triode SE" (Ukraine)
Phase Style Ltd. ::: PhaSt amplifiers ::: Verstrker ::: PhaSt triode SE ::: Deutsch
Phase Style Ltd. ::: PhaSt ::: ::: PhaSt triode SE :::
Quest For Sound Bravo 2.3 (BENSALEM, PA 19020)
Quest For Sound - High End Audio
Prometheus Audio 6C33 SE Amp (Malaysia)
6C33 18Watts of Pure Triode Power
Almarro A318A and A318B interated amplifier (Japan)
almarro of Japan : products

BTW - Very interesting to read is this topic from an other forum:
The short "6C33C Survival Guide"
GoodSoundClub - Romy the Cat's Audio Site - The short "6C33C Survival Guide".

More threads about the 6C33C:
6C33C – Lampa ipo ????? ? ??????? ????
Amplificador de PhaSe 1
GoodSoundClub - Romy the Cat's Audio Site
6C33C -
633 - "", 633- - "" ? -
Ulyanov currently manufacturing the 6c33C?
Graaf GM20 mods - help!
Eintakt Rhrenverstrker mit 6C33 taugt das was - Allgemeines zur analogen Technik und Wiedergabe - Analog-Forum
Erfahrungen mit Welter ACPP 60 - Verstrker, Lautsprecher, Zubehr - Analog-Forum
life in a vacuum
ѹشҤ 2 SE6C33 Ѻ

Last edited by tiefbassuebertr; 14th August 2011 at 04:22 PM.
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