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Sunday, June 12, 2016

Power Transformer Price List

Level  2 & level 3 Power Transformer Price List

  • EI power transformers - Z0 and Z11 cores (level 2)
  • "SHiB" - Super Hi-B Double C core (level 3) 
  • Level 0 and level 1 - please email

  • Multiple electrostatic shields
  • Using the best quality materials - imported OFC wires, insulation, bobbin, and etc
  • Multiple mains possible 100Vac - 240Vac
  • Balanced / bi-filial winding for center-tapped taps (not for ultra high voltage)
  • Regulation ~5%, low temperature, low noise, high efficiency design 
  • Secondary taps - user defined (up to 6 sets, depending on core size) 
  • Power transformers - can be configured and used as isolation transformers
  • Designed for 24/7 operation 
  • Other sizes / VA - please email us for availability or customization
  • Potting - standard colors only. Other colors with extra charge - ask us for details

Level 1 Power Transformer Price List (unlisted - POA) 

  • EI Z11 (0.35mm 35JG155), EI Z10 (0.27mm 27JG120, 27JG130), EI Z9 (0.23mm 23JGSD085(laser stripe), 23JGH095) 
  • Better accuracy and quality than Level 0
  • Potting available at extra charge - depends on size (up to EI 114) - potted with high grade potting compound (high strength, high temp, corrosion resistant, high insulation strength, high heat dissipation), with nickel plated copper turrets 
  • Dupont Nomex T410 teflon film for high voltage transformers

Level 0 Power Transformer Price List
  • H15 0.35mm lamination 
  • Best bang or the buck 
  • Machine wind, high temperature bobbin, vacuum impregnation, oven backed 
  • Hipot tested and outputs verified

General notes / tips

  • Users should keep 10-20% VA unused from total core VA for lower operating temperature and stability - 75% will be ideal. 
  • Higher number of secondary taps will lower efficiency.
  • Mixture of high and low voltage, or high and low current will lower efficiency.
  • Please provide clear schematic if you are unsure of what to order.
  • Separate the B+ transformers and DC filament transformers into 2 transformers for lowest noise. High current bridge or solid state diodes for DC rectification generates A LOT of noise.
J&K Audio Design

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Product Lists

Product Lists

Level 0: link 1

Level 1: link 1, link 2, link 3, link 4

Level 2: link 1, link 2, link 3, link 4, link 5, link 6, link 7, Link 8, link 9

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

Power-trans: link 1

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.

* Our product lines are always improving and increasing. If you do not see what you want, contact us!

* Please email for volume discounts, distributor and OEM pricing.