MEC-50 and MEC-100 miniature electronic chokes

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E-choke better protected

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Auto-bias module improved

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New record buffer isolates the MCML05 from its environment

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Second modification of the MCML05 line stage
with ECC99: MCM-MOD-2

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New Vanderveen Electronic Choke.

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Improve the MCML05 valve pre amplifier with
an ECC99: MCM-MOD-1.

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Change the UL40-S2 into the UL40-S2P power amplifier.

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Tentlabs and Vanderveen introduce a new and advanced auto bias module for valve amplifiers.

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The Vanderveen high-end all valve pre amplifier is available as a DIY kit.

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TubeSociety TS-VV-2006 valve preamp designed and constructed by Tubesociety students.

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Construction of the PR20HE valve power amp, Now available as DIY-KIT.

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The UL40-S2 valve audio-amplifier DIY kit.

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MODIFY THE UL40-S2 STEP BY STEP.

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Modify the UL40-S2 into a Super-Triode amplifier.

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Screen Grid Modification.

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Improved drive of the UL40-S2 power valves in ST-mode plus auto-bias.

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Auto-bias largely improves base and micro detail reproduction.

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