James Audio Transformer Review

Anyone familiar with James output transformers? | diyAudio

https://www.diyaudio.com/community/threads/anyone-familiar-with-james-output-transformers.34961/

James audio transformer 6123HS is a 20W output transformer. This is the cheapest version that they manufactured. Better sounding one with telfon as isolation. 6123HS is using mylar as isolation material. •••

James output transformers | diyAudio

https://www.diyaudio.com/community/threads/james-output-transformers.170335/

Testing audio output transformers with square wave is useless, it will be never used to do so (it makes sense for high-frequency transformers used in switch mode power supplies). Instead, you should look for frequency response curve 10Hz - 100KHz, sinewave THD % measured between primary/secondary, leakage inductance and stray/inter-winding ...

James 300B

http://www.timebanditaudio.com/james300b/James300B.htm

The James transformers outperform the Hammonds I've used in the past, though the Hammonds aren't slouchy. The power transformer is a Hammond unit, rated at 400-0-400 at 465mA. It weighs in at about 12 pounds. The power supply is filtered by 50uF motor run capacitors paralleled with a 100/100uF at 500V JJ electrolytic. ...

James Audio Output Transformers - OCTAVE ELECTRONICS

http://www.octave-electronics.com/Parts/james.shtml

20 rows

Cube - 6moons.com

https://6moons.com/audioreview_articles/mysound/3/

These photos from James Transformer show a basic ED core without windings at left and with completed windings and mount at right. Toroidal audio output transformers are far less common with more ambitious high-end amplifiers even though Shigeki Yamamoto of the eponymous Japanese retro firm does use two in his 300B SET.

James Audio Transformer | Products & Suppliers ...

https://www.globalspec.com/industrial-directory/james_audio_transformer

JAMES - SINGLE END OUTPUT TRANSFORMER

https://www.novotone.be/_site/projets/Projet57/Fig06.pdf

JAMES - SINGLE END OUTPUT TRANSFORMER MODEL Primary DC Bias Current Impedance B-P Power Frequency Response Suitable Tube Dimension Weight (Kg) JS-6112HS 70mA 2.5K / 3.5K 10W 32Hz~62KHz-2dB 2A3 L 1.7 JS-6113HS 60mA 3.5K / …

James Loudspeaker

https://www.jamesloudspeaker.com/

James Loudspeaker. …an industry leader in both high-performance residential and commercial speaker solutions for indoor, outdoor, and marine applications. Designing and manufacturing since 1999, we take great pride in our innovative solutions, unprecedented customization capabilities, flawless sonic reproduction and superior fit and finish.

Measurements of Output Transformers for 300B Single End

https://www.diyparadiso.com/lundahl/fiches_transfos_final2.pdf

Transformer N°4 , Sullerot Julien , James JH2123 Frequency response (N°4 = red, blue = reference) Scores: 0 = bad , 10 = excellent frequencyresponse distortion 10kHz square wave width flatness symmetry weighted H3 H2 weighted HF resonance overshoot weighted 9,39,88,79,36,35,35,98,16,67,6