GOLDEN MIDDLE

Designing and manufacturing of High Fidelity audio systems

We design and build transformers for any amplifier tubes.

All types of our transformers have a limited guarantee period 6 months.


Output transformers

 

SE (single-ended)

TYPE

NOTES

SIZE

2,5kW/8 W125mA 20W

Recommended tubes: 2*6S4S/2A3, 300B, 2*300B, EL34, 2*EL84, 6550, 6L6, 6P3S, 6P3S-E, 2*6P14P

dimensions
100´130´110mm
weight
3 .5 kg

3kW/8, 16W 80mA 20W

Recommended tubes: 6S4S/2A3, 300B, EL34, 6550, 6L6, 6P3S, 6P3S-E

dimensions
100´130´110mm
weight
3.5 kg

3,5kW/8W 125mA 20W

Recommended tubes: 6S4S/2A3, 2*6S4S/2A3, 300B, EL34, 6550, 6L6, 6P3S, 6P3S-E

dimensions
100´130´110mm
weight
3.5 kg

3,5kW/8W 135mA 30W
Super series

Recommended tubes: 2*6S4S/2A3, 300B, 2*300B, 2*6550, 6550, RB300-3CX, 2*RB300-3CX

dimensions
130´130´145mm
weight
6 kg

4kW/8, 16W 125ìÀ 20W

Recommended tubes: 300B, 2*300B, RB300-3CX, 6L6, KT66, KT88, 6P3S, 2*EL84, EL84, 2*6P14P, 6P14P

dimensions
100´130´110mm
weight
3.5 kg

4,5kW/8,16W110mA 20W

Recommended tubes: 300B, RB300-3CX, G807, KT66, KT88, 6P14P, EL84

dimensions
100´130´110mm
weight
4 kg

8kW/8W 140mA 30W
Super series

Recommended tubes: SV572, GM70, GK71

dimensions
130´130´145mm
weight
9 kg

Notes: 1. For SE transformers type 3413 EI-core
2.Max current
3.Freqency response: 20Hz-35Hz (-3db)
4.In box + potted / filled in with sand - EUR10-30 additional    payment
5.The maximum output power in single-ended output stage

PP (push-pull)

TYPE

NOTES

SIZE

5kW/8W 20W
Recommended tubes: 6P3S, 6L6, 6S4S/2A3, 300B

dimensions
100´130´110mm
weight
4 kg

5kW/8 W40W Recommended tubes: 6P3S, 6L6, 6S4S/2A3, 300B, 6550, EL34, 6P41S, 6P36S, 6P45S, KT66, KT88, G807, GU50, 6R3S, GU19

dimensions
100´130´110mm
weight
4 kg

8kW/8 W 20W Recommended tubes: EL84, 6P14P, 6P6S, 6P9, 4P1L, GU17, 6P43P

dimensions
80´ 90´110mm
weight
2.5 kg

6kW/8 W 50W Recommended tubes: RB300-3CX, KT66, KT88, 6550, GU50

dimensions
100´130´110mm
weight
4 kg

12kW/8 W 100W Recommended tubes: GM70, SV572, GK71

dimensions
130´ 130´145mm
weight
9 kg

3kW/30 W 5W Recommended tubes: 2*6N6P, 6S45P, 6S19P
Recommended for headphone amps or as output interstage for preamp.
Torroidal core,ceresine potted in box

dimensions
100´100´80mm
weight
2kg

Notes:

1.For PP transformers type 3413 double C-core
2.Max current in output push-pull stage
3.Freqency response 15Hz-35Hz (-3db)
4.In box + potted - EUR10-40 additional payment
  


Signal transformers

 
INTERSTAGE

TYPE

NOTES

SIZE

5kW/5kW 50 mA 1.Type 3413 EI-core
2.Max current
3.Freqency response: 15Hz-35kHz (-3db)
4.Potted in box

dimensions
70´ 80´90mm
weight
2.5 kg

3kW/2x3kW 50 mA 1.Type 3413 EI-core
2.Max current
3.Freqency response: 15Hz-35kHz (-3db)
4.Potted in box

dimensions
70´ 80´90mm
weight
2.5 kg

3kW/2x3kW Torroidal core,ceresine potted in box
Recommended tubes: 6N6P, 2*6S45P

dimensions
120´ 120´80mm
weight
2 kg


 
INPUT

TYPE

NOTES

SIZE

MC-1/8, 1:8
Step-up transformer, MC head		 Kt=8, Umax=3mV, R1=120W, P-permalloy 79HM,potted in box

dimensions
70´40´25mm
weight
0.2 kg

FSI-1/3x2
Step-up transformer, symmetrical		 Kt=2x3 full sim., Umax=700mV, R1=2k W, G-permalloy 79HM, potted in box

dimensions
70´ 40´25mm
weight
0.2 kg



 
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