12at7 and 6x5gt Rectifier Tubes in the Leben RS-30EQ RIAA

Jan Philips 6X5GT tube for rectifier function in Leben RS30EQ Riaa.
Jan Philips 6X5GT tube for rectifier function in Leben RS30EQ Riaa.

Tubes used in the Leben RS-30EQ RIAA

Beautiful vintage 6X5GT rectifier tube from RCA (Radio Corporation of America). For use in for example Lebens' RS30-EQ RIAA.
Beautiful vintage 6X5GT rectifier tube from RCA (Radio Corporation of America). For use in, for example, Lebens’ RS30-EQ RIAA. A true vintage NOS (New Old Stock) tube acquired from an American surplus inventory dealer. At or above NOS value. 6X5GT tubes are also used in Audio Note UK products, e.g. the Audio Note DAC 3.

In addition to the Leben CS-600 amplifier, I’m a delighted owner of Leben’s only RIAA model, named the RS-30EQ, which sounds both looks and sounds stunning.

The RS-30EQ is based on a circuit including a 6X5GT rectifier tube and two 12AT7s Jan Philips tubes. The European designation for the 12AT7 is ECC81.

Tung-Sol 6X5GT tube for Leben RS30-EQ

 

12AT7T from Jan-Philips, RFT Germany & Siemens Halske

Leben HiFi Company has recently switched from Jan Philips military grade tubes to RFT Germany 12AT7 tubes.

On my wish & to-do list is trying NOS Siemens Halske triple-mica tubes for the RIAA, as I’ve had good results with this producer in my old tube-based preamplifier (an Audio Note M1).

JAN Chs 6X5GT/G – Acceptance Data – 6-45 made for the US Navy

6X5GT rectifier tube. Marked Jan CH '6X5GT/G VT-126B. Acceptance date 6-45. US Army. Rarely seen in pairs with identical serial numbers. For use in e.g. the Leben RS-30EQ and some Audio Note DAC's too.
6X5GT rectifier tubes in original boxes. Marked Jan CH ‘6X5GT/G VT-126B. Acceptance date 6-45. US Army. They are rarely seen in pairs with identical serial numbers. For use in for example the Leben RS-30EQ and some tube-based DACs from Audio Note UK.

 

Manual for the Leben RS30-EQ RIAA (from June 2023)