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Saturday, May 7, 2016

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.



ModelSpecificationsPrice
 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


ModelSpecificationsPrice
L2-IT35 (standard)
L2-OIT35 (oil filled)
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)
U$1590/pr (oil)
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  

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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.


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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.

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