Various / Other TONA 20/40 Step Up Transformer

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The TONA T20/40 SUT step-up transformer, is targeted enthusiasts and intended for moving-coil type cartridges. These traditionally provide a very low signal, and are difficult to amplify without noise.

Four different versions available:
RCA input, RCA output
XLR input, XLR output
RCA input, XLR output
XLR input, RCA output

The transformer is a match for tube amplifiers, as the very high gain at 1:40 can be an advantage at low volume, and can also be used with a (tube) MM RIAA with a good dynamic range at high levels.
At the same time, 1:20 with a more all-round gain, is usable for most cartridges with low output.
Tona T 20/40 has two separate inputs with separate windings on the primary side.

Further information: www.tona.dk or www.sallingboeaudio.com


Specifications:
• Two inputs 1:20 and 1:40
• Connectors can be customized as well the choice of balanced / unbalanced operation
• Laminated soft iron case with 8 to 20 mm overall thickness
• Wideband toroidal nanocrystalline transformers wound inhouse
• Primary resistance 0.13 Ω (1:40)
• Secondary resistance 35 Ω (1:40)
• The transformers are induction matched in stereo pairs before and after winding
• Low noise and wide frequency spectrum -3dB 5Hz-90kHz at 4Ω/10KΩ
• Matched in stereo 0.2 dB 20Hz-20kHz
• Litz primary winding
• Connectors : Rhodium plated RCA connectors, gold plated XLR connectors
• Stable heavy base accepts all XLR and RCA cables
• Tested individually
• CE and ROHS approved
• 2 years warranty
• Hand made in Aarhus, Denmark
Dimensions:
159 x 184 x 50 mm with frame
Total height: 63 mm
Weight: 4.6 Kg

Since the transformer transmits power magnetically, it also avoids the transmission of hum and other noise that can degrade sound quality.
The cabinet is laser-cut from a soft iron type with very low magnetic resistance – and with a wall thickness of between 8 and 20 mm. This effectively blocks hum of any kind – whether it be of electrostatic or magnetic origin.
The large amount of soft iron in the shielding leads to a rather high overall weight of 4.6 kg, which also slows down unwanted vibrations and provides a stable base even when heavy cables have to be connected.