For very low capacitance and excellent high frequency response our High-End bobbin transformers are wound chambered (topology adopted in BV8 and some other expensive transformers). Each layer of winding is soaked and molded in varnish to significantly reduce distortions caused by the coil movement as a result of mechanical interaction with lamination core. Because we use CNC winding machinery, the layers are laid perfectly even and the density of the winding is much improved, which allows us to use thicker gage wire to get lower DCR and copper losses.
These transformers are of very high quality design and can take 7.5V on 20Hz at 3% distortions. Their size allows using them as a direct drop in to popular Chinese FET microphones, such as MXL2001 and V67G, or tube microphones, such as Nady 1050, 1150, Apex 460 and many others. Of course, they can be used in DIY projects.
10:1 transformer can be used for converting the MXL2001/V67G (and many others) microphones into Neumann U87 type of circuit. Those microphones already have the U87 EQ section (de-emphasis, to remove the boost introduced by K67/87 capsules and their clones), so all you need to do is to remove emitter follower driver stage, replace some capacitors for high quality ones, and connect the new transformer. The transformers will also fit Oktava MK319. We can provide instructions for modification.
- CT5 5:1 --$109 (for use with cathode follower tube microphones)
- CT6 6.5:1 --$109 (for use with EF86, 6AK5, 5840 tubes)
- CT10 10:1 --$109 (for use with 12AT7 tube, or with FET microphones--KM84, or U87 type of circuit)
- CT12 12:1 --$109 (for use with 6072/12AY7, 12AX7)
These transformers have a bigger core and even higher overload. Our design has 4 chambers for symmetry, very low capacitance and excellent high frequency response. Currently we have two models: LT1/1 and LT1/2. The LT1/1 has 4 identical windings of 150 Ohm each, and LT1/2 is 150:150:600:600 Ohm. Each layer of winding is molded in varnish. Because we use CNC winding machinery, the layers are laid perfectly even and the density of the winding is much improved, which allows using thicker gage wire to get lower DCR and copper losses.
Pin through design, fits perforated boards, or use your own PCB. Leads are possible for extra charge.
Besides being used for balancing the signals, galvanic isolation, and step-up step down, the LT1/1 can also be used as splitter, or MS matrix converter:
Can be configured as:
1:1:1:1 (150:150:150:150 Ohm)
1:1 (600:600 Ohm)
1:2/2:1(150:600/600:150 Ohm)
Can be configured as:
1:1 (600:600 Ohm)
1:2/2:1 (150:600/600:150 Ohm)
1:2/2:1 (600:2,400/2,400:600 Ohm)
1:4/4:1 (150:2,400/2,400:150 Ohm)