Coupling Transformer Interstage Transformer

Level 2 (medium-high end) Transformers 

* Representative data but not comprehensive. Please email us if you do not find what you need.
* Permalloy Cut core (C core) is available too with 10% additional charge, not for all sizes. Please email.

Model	Specifications	Price
L2-PRE626	Usage: input coupling, input step-up (no DC) Imp: 600 Ohm: 26K Ohm DC: 0mA, no DC allowed Gain: 6.8   Freq: 20Hz - 20kHz @-0.18dB Freq: 5Hz - 50kHz @ -3dB Loss: 0.25dB Weight: ~6KG/pair  * OFC copper wire, hybrid EI Permalloy core, potted in square grey case * Good for input coupling, or input step-up to drive driver/power tubes (with capable drivers)	U$490/pr
L2-PRE197A L2-PRE246	Usage: preamp / linestage output transformer Imp: 24K (6K+6K) Ohm: 600 Ohm DC: 0mA, no DC allowed Gain: 5:1 * L2-PRE197A freq: 25Hz - 30kHz @ -3dB (high impedance triode 6J8P) * L2-PRE246 freq: 5Hz - 50kHz @ 3dB (low impedance triode 6SN7) * For low impedance Triode, eg. 5687/6SN7, please use L2-PRE246 for better frequency response Primary DCR: 1308 Ohm, Sec DCR: 62 Ohm Primary DC: 20mA max, Sec DC: 30mA max Output: 35V max Loss: 0.6dB Weight: ~6KG/pair  * L2-PRE197A - improve over WE 197A. OPT with original WE 197A design is available too.  * OFC copper wire, hybrid EI Permalloy core, potted in square grey case * Good for input coupling, or input step-up to drive driver/power tubes (with capable drivers)	U$690/pr

Model	Specifications	Price
L2-IT35 (standard)	Usage: (2A3) power tube driver power tube (interstage) Power: 15W (20Hz, SE) Imp: 3.5K: 1.5K+1.5K (6K); 1:0.66+0.66 (1.32) DCR: pri 120 Ohm, sec 200 Ohm (sec in series) DC: primary 110mA max,secondary 30mA + 30mA max (or 60mA paralleled)  *Freq: 20Hz - 20kHz @-0.3dB (flat with 2A3 in circuit) *Freq: 10Hz - 60kHz @-3dB (in circuit with 2A3)  THD: <0.2% (at 1KHz, 2K Ohm load at 0dB)  Loss: 0.3dB Weight: ~9KG/pair  * OFC copper wire, hybrid EI Permalloy core, potted in square grey case	U$890/pr (std)
L2-IT45 (standard) L2-OIT45 (oil filled)	Usage: (300B) power tube driver power tube (interstage) Power: 20W (20Hz, SE) Imp: 5K: 20K; or 5K: 5K + 5K DCR: pri 100 Ohm, sec 400 Ohm (sec in series) DC: primary 170mA max,secondary 30mA + 30mA max (or 60mA paralleled)  *Freq: 20Hz - 20kHz @-0.3dB (flat with 300B in circuit) *Freq: 10Hz - 60kHz @-3dB (in circuit with 300B)  THD: <0.2% (at 1KHz, 2K Ohm load at 0dB)  Loss: 0.3dB Weight: ~10KG/pair  * OFC copper wire, hybrid EI Permalloy core, potted in square grey case	U$990/pr (std) U$1690/pr (oil)

J&K Audio Design
5/8/2016

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

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

Iso-trans: link 1, link 2

* 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.