Dynaco St35 /SCA-35 Output Transformer Upgrade (Pair).

The transformers are suitable for upgrading dynaco ST35 /SCA-35 amplifier or build a project based on ST35 topology. Please note that the transformers are not a drop through replacement. The transformers are built in a bigger core to ensure improved overall performance.

TECHNICAL FEATURES:

Primary Impedance: 8K (Anode to Anode)

Ultralinear :23%

Secondary Impedance: 4/8 Ω

Primary Dc resistance: 276 Ohm

Primary Inductance :305H@17Vrms 50hz

Max Dc current per tube :160mA (Anode to CT)

Maximum output power : 18W

Frequency Response: 5hz-60Khz -3bB

Core size :EI75/40

Lead wire lengths: 400mm

Color code of lead wires:

    Anode 1:White

    Anode 2:Black

    UL1:Grey

    UL2:Orange

    B+:Red

    0:Blue

    4Ohm:Yellow

    8 Ohm:Green

Core material: M6 Grain Oriented Silicon Steel made in Europe.

Lamination thickness: 0.35mm

Dynaco ST70 Output Transformer Upgrade (Pair).

The transformers are suitable for upgrading dynaco ST70 amplifier or build a project based on ST70 topology.

Please note that the transformers are not a drop through replacement.

The transformers are built in a bigger core area with more interleaving between primaries and secondaries to ensure improved overall performance , lower distortion and wider frequency response.

TECHNICAL FEATURES:

Primary Impedance: 4k3(Anode to Anode)

Secondary Impedance: 4/8/16 Ω

Ultralinear taps : 33% (or any percentage on request)

Primary Inductance Lp=100H @17Vrms/50hz 

Primary Dc resistance: 170 Ohm

Max Dc current per tube :240mA (Anode to CT)

Output power : 60W 

Frequency Response: 10Hz-48Khz -3dB

Core material: high quality silicon steel made in Europe

Core size : EI96 /60 Lamination thickness :0.35mm

Dimensions :129mmx97mmx86mm

Weight :3.6Kgr per transformer

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe Wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: vertical placement.

Dynaco St35 /SCA-35 Output Transformer Upgrade (Pair).

The transformers are suitable for upgrading dynaco ST35 /SCA-35 amplifier or build a project based on ST35 topology. Please note that the transformers are not a drop through replacement. The transformers are built in a bigger core to ensure improved overall performance.

TECHNICAL FEATURES:

Primary Impedance: 8K (Anode to Anode)

Ultralinear :23%

Secondary Impedance: 4/8 Ω

Primary Dc resistance: 276 Ohm

Primary Inductance :305H@17Vrms 50hz

Max Dc current per tube :160mA (Anode to CT)

Maximum output power : 18W

Frequency Response: 5hz-60Khz -3bB

Core size :EI75/40

Lead wire lengths: 400mm

Color code of lead wires:

    Anode 1:White

    Anode 2:Black

    UL1:Grey

    UL2:Orange

    B+:Red

    0:Blue

    4Ohm:Yellow

    8 Ohm:Green

Core material: M6 Grain Oriented Silicon Steel made in Europe.

Lamination thickness: 0.35mm

TECHNICAL FEATURES:

Primary Impedance: 8K (Anode to Anode)

Secondary Impedance: 4/8 Ω

Ultralinear tap:25%

Primary Inductance Lp=147H @17Vrms/50hz

Leakage inductance : 6mH

Primary Dc resistance: 172 Ohm

Max Dc current per tube :170mA (Anode to CT)

Maximum output power : 15W

Frequency Response: 10Hz-96Khz -3dB

Core material: high quality grain oriented silicon steel M6 (19Kilogauss)

Core size : EI75/40, Lamination thickness /0.35mm

Weight 1.3Kgr per transformer

Dimensions : 75mmx64mmx91mm

Winding Wire: Double coated Grade 2 enamelled copper wire Wound in Precision Multi section winding, for reduced leakage inductance and high dielectric strength.

TECHNICAL FEATURES:

Primary Impedance: 8K5 (Anode to Anode)

Secondary Impedance: 4/8 Ω

Ultralinear taps : 25%

Primary Inductance Lp=133H @17Vrms/50hz

Leakage inductance : 6mH

Primary Dc resistance: 186 Ohm

Max Dc current per tube :120mA (Anode to CT)

Maximum output power 10W

Frequency Response: 12hz-54Khz -1bB at 1W output power.

Lead wire lengths: 400mm

Color code of lead wires

  White :Anode 1

  Black:Anode 2

  Red :B+

  Gray :Ultralinear1

  Orange:Ultralinear2

  Brown :o

  Yellow:4 Ohm

  Green :8 Ohm

Core material: high quality , low loss silicon steel made in Europe. 

Core size :EI60/30.

Lamination thickness: 0.50mm 

Dimensions: 62mx51.5mmx55mm (86mm foot distance) 

Footprint hole 5x6mm

Weight: 750gr per transformer

Winding Wire: Double coated Grade 2 enamelled copper wire Wound in Precision Multi section winding, for reduced leakage inductance and high dielectric strength.

TECHNICAL FEATURES:

Primary Impedance: 8K (Anode to Anode)

Secondary Impedance: 8Ω

Primary Inductance Lp=350H @230Vrms/50hz

Leakage inductance : 5.6mH/1Khz

Primary Dc resistance:137 Ohm

Max Dc current per tube :350mA (Anode to CT)

Maximum output power : 100W

Frequency Response: 4Hz-77Khz -3bB (test condition 2x6L6 triode mode, 1.5W output/8R)

core material: high quality  silicon steel, made in Europe

core size : EI120 /60

Lamination thickness :0.35mm

dimensions :120mmx105mmx120mm

weight :5.6Kgr per transformer

Winding method :layer wound with insulation insertion between every layer.

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe, wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: vertical

TECHNICAL FEATURES:

Primary Impedance: 16K (Anode to Anode) or 21K (depending on the secondary load)

Secondary Impedance: 6 Ω or 8Ω

Primary Inductance Lp=350H @17Vrms/50hz

Leakage inductance : 150mH Primary

Dc resistance:180 Ohm

Max Dc current per tube :350mA (Anode to CT)

Maximum output power : 100W

Frequency Response: 7.2Hz-62Khz -3bB

core material: high quality grain oriented silicon steel (19000Gauss) annealed, made in Europe

core size : EI120 /70

Lamination thickness :0.35mm

dimensions :120mmx105mmx120mm

weight :6.6Kgr per transformer

Winding method :layer wound with insulation insertion between every layer.

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe, wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: vertical or horizontal placement

TECHNICAL FEATURES:

Primary Impedance: 4k5 (Anode to Anode)

Secondary Impedance: 4/8 Ω (all secondaries are independed and the user can wire the transformer's secondary to have 4Ohm or 8Ohm load match ,without wasting any part of secondary , according to the schematic provided with the transformers)

Ultralinear taps : 42%

Primary Inductance Lp=91H @17Vrms/50hz

Leakage inductance : 12mH

Primary Dc resistance: 165 Ohm

Max Dc current per tube :240mA (Anode to CT)

Maximum output power : 60W

Frequency Response: 10Hz-120Khz -3bB

Core material: high quality silicon steel made in Europe

Core size : EI96 /50

Lamination thickness :0.35mm

Dimensions :110mmx96mmx83mm

Weight :2.95Kgr per transformer

Winding method :layer wound with insulation insertion between every layer.

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe Wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: horizontal or vertical placement

Wide bandwidth, push pull ultralinear Output transformers,60W (pair)

Designed for EL34, KT88,6550 (or others with similar impedance) push-pull amplifiers

TECHNICAL FEATURES: Primary Impedance: 4k3(Anode to Anode)

Secondary Impedance: 4/8/16 Ω

ultralinear taps : 42%

Primary Inductance Lp=100H @17Vrms/50hz

Leakage inductance : 6mH

Primary Dc resistance: 150 Ohm

Max Dc current per tube :240mA (Anode to CT)

Maximum output power : 60W Frequency Response: 10Hz-48Khz -3dB

Core material: high quality silicon steel made in Europe

Core size : EI96 /60

Lamination thickness :0.35mm

Dimensions :129mmx97mmx86mm

Weight :3.42Kgr per transformer

Winding method :layer wound with insulation insertion between every layer.

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe

Wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: horizontal placement.

TECHNICAL FEATURES:

Primary Impedance: 9K (Anode to Anode)

Secondary Impedance: 8 Ω

Ultralinear tap:50%

Primary Inductance Lp=147H @17Vrms/50hz

Leakage inductance : 6mH

Primary Dc resistance: 172 Ohm

Max Dc current per tube :170mA (Anode to CT)

Maximum output power : 15W

Frequency Response: 10Hz-96Khz -3dB

Core material: high quality grain oriented silicon steel M6 (19Kilogauss)

Core size : EI75/30,

Lamination thickness /0.35mm

Weight 1.2Kgr per transformer

Dimensions : 75mmx64mmx72.5mm

Winding Wire: Double coated Grade 2 enamelled copper wire Wound in Precision Multi section winding, for reduced leakage inductance and high dielectric strength.

Mounting: open frame clamps suitable for vertical or horizontal placement

TECHNICAL FEATURES:

Primary Impedances: 850R-1k2-1k7-2k-2k5-3k5-3k9- 5k-6k9-7k2-7k8-10K-15k7(Anode to Anode) ,for further possible load matches info please refer to impedance table provided with the transformers.

Secondary Impedances: 1/2/3.6/4/5.2/5.7/8/16Ω.

For all available load matches in the transformers ,all secondary windings are connected in combinations, leaving no unused part of the secondary as in classic tap approach. Detailed connection diagram is provided with the transformers.

Ultralinear taps : 25%-37%-50%

Primary Inductance Lp=156H @17Vrms/50hz

Primary Dc resistance:52 Ohm

Max Dc current per tube :500mA (Anode to CT)

Maximum output power :100W

Frequency Response: 5Hz-120Khz -3bB at 75W

Output power , depending on chosen load match.

Core material: high quality grain oriented silicon steel(19000 Gauss) made in Europe

Core size : EI150 /50 ,partially airgaped for better handling any Dc imbalance.

Lamination thickness :0.35mm

Dimensions :130mmx155mmx14mm

Weight :8.05Kgr per transformer

Winding method :layer wound with insulation insertion between every layer.

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe Wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: vertical or horizontal placement

High Quality ,Wide bandwidth, push pull ultralinear/cathode feedback Output transformers,70W (pair) , splitbobbin topology.

Designed for EL34, KT88,6550 (or others with similar impedance) push-pull amplifiers operating in ultralinear mode or in cathode feedback mode.

All primaries sections are terminated separately in pins giving the benefit of series or cross connection between anodes in each section of bobbin providing better coupling according to the chosen class of operation.The transformers can be connected to give also 1k9:8R load match. An analytic connection diagram is provided with the transformers.

TECHNICAL FEATURES:

Primary Impedance: 7k4 (Anode to Anode) or 1K9 (depending on the secondary wiring connection)

Secondary Impedance: 8 Ω

Ultralinear taps : 16.6%&50%

Cathode feedback : 16.6%

Primary Inductance Lp=102H @17Vrms/50hz

Leakage inductance : 8mH

Primary Dc resistance: 108 Ohm

Max Dc current per tube :300mA (Anode to CT)

Maximum output power : 70W

Frequency Response: 14Hz-70Khz -3bB at 40W output power core material: high quality silicon steel made in Europe

Core size : EI120 /50

Lamination thickness :0.35mm

Dimensions :125mmx105mmx110mm

Weight :4.79Kgr per transformer

Winding method :splitbobbin -layer wound with insulation insertion between every layer.

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe, wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: vertical or horizontal placement

TECHNICAL FEATURES:

Primary Impedance: 8K8 (Anode to Anode)

Secondary Impedance: 8 Ω

Ultralinear taps : 42%

Primary Inductance Lp=91H @17Vrms/50hz

Leakage inductance : 12mH

Primary Dc resistance: 162 Ohm

Max Dc current per tube :240mA (Anode to CT)

Maximum output power : 50W

Frequency Response: 12Hz-76Khz -3bB power

Core material: high quality silicon steel made in Europe

Core size : EI96 /50

Lamination thickness :0.35mm

Dimensions :100mmx96mmx83mm

Weight :2.9Kgr per transformer

Winding method :layer wound with insulation insertion between every layer.

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe Wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: open frame clamps suitable for vertical or horizontal placement

Wide bandwidth, push pull ultralinear Output transformers,30W (pair) Designed for EL34, 6L6,KT88,6550 (or others with similar impedance) push-pull amplifiers

TECHNICAL FEATURES:

Primary Impedance: 6k6 (Anode to Anode)

Secondary Impedance: 4/8 Ω

Ultralinear taps : 42% (or any other percentage on request)

Primary Inductance Lp=123H @17Vrms/50hz

Leakage inductance : 8mH

Primary Dc resistance: 153 Ohm

Max Dc current per tube :240mA (Anode to CT)

Maximum output power: 30 W

Frequency Response: 5.8Hz-78Khz -3bB (tetrode/pentode connection)

Core material: high quality silicon steel made in Europe

Core size : EI84/50

Lamination thickness :0.35mm

Dimensions :112mmx90mmx70mm

Weight :2.24Kgr per transformer

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe Wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: Vertical placement

TECHNICAL FEATURES:

Primary Impedance: 6k6 (Anode to Anode)

Secondary Impedance: 4/8 Ω (all secondaries are independed and the user can wire the transformer's secondary to have 4Ohm or 8Ohm load match ,without wasting any part of secondary , according to the schematic provided with the transformers)

ultralinear taps : 42%

Primary Inductance Lp=114H @17Vrms/50hz

Leakage inductance : 12mH

Primary Dc resistance: 173 Ohm

Max Dc current per tube :240mA (Anode to CT)

Maximum output power : 60W

Frequency Response: 10Hz-74Khz -3bB at 30W output power core material: high quality silicon steel made in Europe

Core size : EI96 /60

Lamination thickness :0.35mm

Dimensions :129mmx97mmx86mm

Weight :3.42Kgr per transformer

Winding method :layer wound with insulation insertion between every layer.

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe Wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.

Mounting: horizontal placement

TECHNICAL FEATURES:

Primary Impedance: 5K5 (Anode to Anode)

Secondary Impedance: 8 Ω

Ultralinear taps : 42%

Primary Inductance Lp=91H @17Vrms/50hz

Leakage inductance : 8mH

Primary Dc resistance: 159 Ohm

Max Dc current per tube :240mA (Anode to CT)

Maximum output power : 60W

Frequency Response: 10Hz-76Khz -3bB at 30W output power

Core material: high quality silicon steel made in Europe

Core size : EI96 /50

Lamination thickness :0.35mm

Dimensions :100mmx96mmx83mm

Weight :2.9Kgr per transformer

Winding method :layer wound with insulation insertion between every layer.

Winding Wire: Double coated Grade 2 enamelled copper wire made in Europe Wound in Precision Multi section winding, for reduced leakage inductance, low parasitic capacitance and high dielectric strength.