Telos

Phono


Step-up Transformers


Ypsilon: MC Stepup

MC Step Up Transformer

MOVING COIL STEP UP TRANSFORMERS

The MC series moving coil step-up transformers are used to amplify the low level output signal from a moving coil cartridge bringing it to the appropriate level to drive a moving magnet phono preamp.

 

The MC5 provides 5 times transformation ratio or 14db of gain

The MC10 provides 10 times transformation ratio or 20db of gain.

The MC16 provides 16 times transformation ratio or 24db of gain.

The MC20 provides 20 times transformation ratio or 26db of gain.

When terminated in 47k which is the standard input impedance of MM phono preamps the equivalent input impedance of each one would be:

MC5 2K ohm

MC10 500 ohm

MC16 200 ohm

MC20 140 ohm

If additional loading is needed, it can be done through the parallel input RCA connectors.

The MC series transformers are large size single C-core double coil transformers using a proprietary amorphous core material. Special winding techniques were developed in order to minimize inter-winding capacitances and maintain wide frequency response. They are optimized sonically to be as invisible as possible.

The transformers are shielded with mu-metal and are potted in 10mm thick soft iron nickel coated enclosures providing immunity to outside magnetic fields and a quiet and noise free performance.

The MC transformers were developed in conjunction with the VPS100 phono preamp. They can be used with most of the moving coil cartridges. For optimum performance the MC transformers can be used within a specific range of cartridge output levels.

MC5 may be used with cartridges from 0.8 - 1.2mv

MC10 may be used with cartridges from 0.4 - 0.6mv

MC16 may be used with cartridges from 0.3 - 0.4mv

MC20 may be used with cartridges from 0.2 - 0.3mv

 

SPECIFICATIONS MC STEP UP

FREQUENCY RESPONSE -3db
(source impedance<50ohm)
8Hz-70khz
INPUT IMPEDANCE
When terminated @ 47kohm
2Kohm

GAIN

14db
INDUCTANCE
(measured @ secondary)
80H<<
MAX. LEVEL @ 20Hz
(measured @ secondary)
+20dbu
DIMENSIONS 100x120 (H x D) mm
WEIGHT 4 Kgr

FREQUENCY RESPONSE -3db
(source impedance<50ohm)
8Hz-70khz

INPUT IMPEDANCE
When terminated @ 47kohm

500ohm

GAIN

20db

INDUCTANCE
(measured @ secondary)

80H<<
MAX. LEVEL @ 20Hz
(measured @ secondary)
+20dbu
DIMENSIONS 100x120 (H x D) mm
WEIGHT 4 Kgr

FREQUENCY RESPONSE -3db
(source impedance<50ohm)

8Hz-65khz
INPUT IMPEDANCE
When terminated @ 47kohm
200ohm

GAIN

24db
INDUCTANCE
(measured @ secondary)
80H<<
MAX. LEVEL @ 20Hz
(measured @ secondary)
+20dbu
DIMENSIONS 100x120 (H x D) mm
WEIGHT 4 Kgr

FREQUENCY RESPONSE -3db
(source impedance<50ohm)
8Hz-60khz
INPUT IMPEDANCE
When terminated @ 47kohm
140ohm

GAIN

26db
INDUCTANCE
(measured @ secondary)
80H<<
MAX. LEVEL @ 20Hz
(measured @ secondary)
+20dbu
DIMENSIONS 100x120 (H x D) mm
WEIGHT 4 Kgr

These are in our opinion some of the best MC Step Up transformers money can buy. Also available in custom Silver Versions for extreme performance when coupled to Ypsilon Phono stages or other quality phono stages reduce the noise floor significantly and allow the music to flow effortlessly.

 



My Sonic Lab: Stage 303 Step-Up

MC Step-Up Transformer

The Stage 303 is a high-quality step-up transformer to enhance the output signal level of low-impedance (1Ω~6Ω)MC cartridges up to that of standard high-output cartridges.

Step-up Transformer for Low-Impedance MC Cartridges.

The EMINENT - an epoch-making MC cartridge developed by My Sonic Lab offers an unprecedented 1.8Ω low impedance. To make the most of the high output energy under such an amazingly low impedance, the MC transformer of low internal loss plays the most suitable and effective role, which has been a common knowledge among all the designers & engineers versed in MC cartridges.

As a matter of course, no problem is envisaged in terms of step-up ratio or amplification voltage when used in combination with normal low-impedance MC transformer or good head-amp, but in the case of an MC cartridge featuring low internal impedance, you can expect an ideal reproduction only with a low-loss MC transformer designed in the same concept.

For this reason, we decided to introduce the matching MC transformer named the "Stage 303". This Stage 303 uses unusual stout wires, Φ0.55mm at the primary side & Φ0.18mm at the secondary, for which we need larger core to provide wider winding space.

On the other hand, large core causes ferrite loss due to longer magnetic paths, thus inevitably deteriorating response speed to weak signals. To solve this problem, the magnetic characteristics of the core had to be ameliorated.

Eventually developed is our super Hi-μ core material "PC-SX" offering such stupendous magnetic characteristics that are 6.5 times larger in initial permeability & more than 1.5 times higher in magnetic flux density compared to conventional JIS PC material.

Our exclusive core thus avoiding deterioration of response speed ensures distortion-free reproduction with good phase characteristics as well as affluent dynamics.

The Stage 303 derives the full potential of any low-impedance cartridges not to mention the EMINENT.

My Sonic Lab Stage 303 - SPECIFICATIONS :

Frequency bandwidth

10Hz - 100kHz (2Ω/47kΩ)

Step-up ratio

 22dB (2Ω/47kΩ, 1kHz)

Input impedance

1Ω - 6Ω (applicable cartridge impedance)

Load resistance

47kΩ 
Channel balance 0.1dB (1kHz)

Channel separation

more than 100dB (1kHz)

Connectors

Rhodium-plated (RCA & GND terminals)

Other features

: Floating selector, Hi-μ core PC-SX, Terminate resistor VISHAY S102K

Weight

1.8kgs

The Stage 303 has been developed to provide the most suitable and effective step-up performance to the Eminent, low-impedance MC cartridge from My Sonic Lab, but thanks to its inherently low internal loss characteristics an outstanding voltage enhancement is possible with other low-impedance cartridges as well.

However bear in mind that the higher the load impedance, the lower the step-up ratio due to the load impedance set at 2Ω for 22dB step-up ratio.

At the time of interconnection, you may choose the primary side (input) between the Floating Input circuitry (Floated Balance) and Unbalanced (GND) circuitry. MC cartridges employ the balanced output circuit without grounding and normally the selector is set at the "FLOATING" position. In case of noises caused by grounding conditions of tonearm & turntable, however, set the selector at the "GND" position.

The secondary side (output) configures the Floating Output circuit without grounding, allowing one to interconnect the output to an MM input of a phono amp by means of a high-quality line cable. This offers stable grounding connection.

These Step Up's are high quality devices in the best Japanese tradition of moving coil step up transformers. Lower noise floor and better dynamics.