Signal Transformer & MagneTek Triad transformers, made in USA

 

Signal Transformer DP-241-6-20
Mounting Chassis Mount
Power (VA) 30
Input (V) 115V/230V
Frequency (Hz) 50/60Hz
Output Series 20VCT
Length 3.25 in. (82.6 mm)
Width 1.74 in. (44.2 mm)
Height 1.96 in. (49.8 mm)
Weight 1.1 lbs (0.5 kg)

Hammond Transformer 735496-01 Rev. G H300968 Rev. 16, made in Canada

 

Anode Transformer TC 109, 1970s, made in Japan

Анодный трансформатор, Япония. Абсолютно бесшумный, идеален для кенотрона.

Напряжения указаны для DC, измеренные напряжения АС меньше ровно на 1,2.
Трансформатор позволяет реализовать БП с возможностью подстройки напряжения на выходе.

Возможно такое решение было обосновано, при производстве трансформатора под конкретное устройство с рассчитанными параметрами нагрузки

Трансформатор залитый в кожухе, соответственно он не разбирался и не перематывался

Измерения производились в нашей сети с напряжением 235-240V

Choke Oil Filled 5H current up to 200mA

 

Link:

5H 200mA DC
Oil Filled Choke
C Core Construction
DC Resistance 100 Ohms
Weight 1kg
Ceramic terminals and threaded bushings for fastening.

Audio Note Choke-160 10H 125mA, made in UK

Link: hificollective

High quality 10H, 125mA suitable for valve power supply for low/medium powered amplifier. Vacuum impregnated to keep lamination vibration to a minimum.

Flying leads up to 40cm in length. open framed style transformer, for mounting upright, on side on top or inside of the chassis.

DC resistance:
64R

Overall weight:
1.6kg

Overall size:
80mm(w) x 69mm(d) x 69mm(h).

Fixing holes:
Both Footprints: centers on a rectangle of 54mm x 57mm

RAKK DAC mk1 D/A Converter | К&К Audio PCM1794 24bit/192kHz, made in USA

Link: kandkaudio

DAC на основе заводских плат К&К Audio на PCM1794 с I/U преобразованием на трансформаторах с аморфными сердечниками Lundahl LL1674. Вход spdif, входной трансоформатор Lundahl 1572.

Edcor XPWR 195-230, made in USA

Link: edcorusa

Вторичная обмотка удобна для кенотрона, накальная со средней точкой.

Specifications:
Primary (input) Voltage: Depends on model
Secondary (output) Voltage: 500V(250-0-250)@175mA, 6.3V(3.15-0-3.15)@4A & 5V@2A
Winding Configuration: Primary-Secondary
Bobbin Material: Nylon 6/6 GF-30
Flammability Rating: Class HB
Coil Finish Wrapping: Polyester Film Electrical Insulating Tape
Core Size: EI125 (1.25" x 1.5")
Core Material: M-6 29 ga. grain oriented lamination steel
Secondary Insulation: Clear air dry polyester varnish
Termination: 15" (38cm) UL1015, 18 ga. lead wire
Mounting: Steel end bell covers
Mounting Orientation: Vertical
Weight: 6 lbs.
Compliance: RoHS & REACH
Dimensional Drawing: 15000-EI125-150-0X

Edcor GXSE10-8-5K output transformer, 2009, made in USA

 

Link: don-audio

10W, single ended tube output transformer for 5K Ohms to 8 Ohms. 10 Watts

Specification:
Wattage: 10W
Primary (input) Impedance: 5K Ohms (5000 Ohms)

Primary (input) DCR: 149 Ohms

Primary (input) Inductance: 6H

Screen/Grid Tap: 40%

Secondary (output) Impedance: 8 Ohms

Secondary (output) DCR: 1.2 Ohms

Frequency Response: 40~18K Hz., <1dBu

THD+Noise: <0.1% @ 1K Hz.
Bobbin Material: Glass Filled Nylon 6/6
Flamability Rating: Class B 130°C

Core Material: M6 29 ga. line grain oriented steel

Termination: UL1015, 20 ga. lead wire

Mounting: Powder coated steel end bells

Weight: 1.75 lbs.

Compliance: RoHS & REACH

Hashimoto HC-203U SE output transformer, 2005, made in Japan

Link: acoustic-dimension

The Hashimoto HC-203U is for applications that require 2.5K or 3.5K Ohms primary with up to 20 Watts output level into 4, 8, 16 Ohms. The HC-203U is equipped with an Ultra-Linear tap for both 2.5K and 3.5k Ohms primary, and its frequency response covers between 30Hz and 60,000Hz (+-3db) - please click the right thumbnail to see the actual chart. The HC-203U is called a universal type because it can be used under 2.5K or 3.5K Ohms of primary through separate B+ terminals. Since the HC-203U has separate B+ terminals, it also has independent Ultra-Linear taps for each primary impedance. The HC-203U is suitable for single-ended applications that utilize popular vacuum tubes, such as 300B, 2A3, KT-88, 6550, EL34 (6CA7), 6B4G, 6A3, and 6L6-GC. The HC-203U is a brand new product that Hashimoto introduced at the 11th Tube Audio Fair in Tokyo on October 8, 2005. The HC-203U is a cost down version of the Hashimoto's best seller, the H-20-3.5U.

The differences between these two models are:

1. The HC-203U does not have the protective outer shield that is filled with the special pitch to protect the core from the electro-magnetic interferences and noises.

2. Because of the less protection from the electro-magnetic interferences and noises, the core is designed a little more conservative way to satisfy narrower frequency response.

Otherwise, the HC-203U has the very similar sound characteristics to the famed H-20-3.5U.

The HC-203U measures 90 (W) x 90 (D) x 83 (H) mm, and weighs 2.0Kg (4.4 LB).

The Primary Inductance can be chosen between 10H/100mA (2.5K Ohms) and 13H/80mA (3.5K Ohms). The Maximum DC Current can be up to 130mA.