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Thursday, February 20, 2014

Vintage Series Price List



Vintage Series Price List (updated 20/2/2014)

Please use this page for your price reference. Due to the ever increasing price of iron and copper, we will try to keep our price to be reasonable but we can’t do so forever. So, order early to save more money. If you have other specifications, please contact us.



1.35K single ended output transformer

  • ·        For 6AS7, 6080 low impedance double triode and similar tubes
    ·        Japanese Z11 core, EI-66x36 core, encapsulated with wires drawn out
    ·        1.35K – 1K dual-taps, 0-4-8 Ohm output
    ·        100mA primary current
    ·        20Hz – 20kHz @ +/- 0.5dB @ 8 Ohm 1W
    ·        Size 68mm (L) x 68mm (W) x 58mm (H)
    ·        U$131/pair

5K single ended output transformer version 1.0

  • ·        For 45, EL84, 5687, 5842, 6C45PI
    ·        Japanese Z11 core, encapsulated with wires drawn out
    ·        5K with 43% SG ultra linear tap for Pentode, 0-4-8-16 Ohm output
    ·        Size 68mm (L) x 68mm (W) x 58mm (H)
    ·        U$131/pair

5K single ended output transformer version 2.0

  • ·        For 45, EL84, 5687, 5842, 6C45PI, 6L6, 6V6
    ·        Japanese Z6 0.3mm lamination EI-66x30 core, Teflon/Nomex insulation
    ·        5K, 0-4-8-16 Ohm output
    ·        Primary DCR 326 Ohm
    ·        20Hz – 20kHz +/- 0.5dB @ 1W
    ·        Size 68mm (L) x 68mm (W) x 58mm (H)
    ·        U$171/pair

10K single ended output transformer

  • ·        For 10, 10Y, VT25A, 801A and similar tubes
    ·        Z6 EI-66x36 core, 0.3mm lamination, Teflon/Nomex insulation
    ·        10K : 0 – 8 – 16 Ohm
    ·        Precision primary winding with low tolerance
    ·        Wide bandwidth – 20Hz – 20kHz @ +/- 0.5dB (50kHz -3dB)
    ·        U$209/pair

1:1 interstage transformer

  • ·        For 5842, 6C45, 5687, 6H30 and similar tubes
    ·        5K: 5K @ 30mA
    ·        U$119/pair

1: 0.5 + 0.5 interstage transformer (phase splitting)

  • ·        Multiple configuration possibilities
    o   For single ended to push-pull configuration, single ended to single ended
    o   1:1, 1:0.5,  1:0.5+0.5
    ·        Z11 core
    ·        Secondary can be in parallel for lower impedance output
    ·        Primary 5K, primary DCR 370 Ohm, secondary DCR 265 Ohm + 265 Ohm
    ·        Maximum primary current 30mA
    ·        20Hz – 20kHz +/- 0.5dB
    ·        Size 59mm (L) x 55mm (W) x 51mm (H)
    ·        U$169/pair

5:1 or 1:5 Permalloy or Z11 input transformer

  • ·        80% nickel iron core, permalloy!
    ·        Encapsulated with solder taps
    ·        Teflon tape insulation
    ·        Usage: galvanic isolation, system with too much/less gain, for driving low impedance stages / cables (step down configuration)
    ·        15k: 600 Ohm (5:1) step-down or step-up
    ·        Size 50mm (L) x 43mm (W) x 59mm (H)
    ·        U$276/pair (Permalloy); US$138/pair (Z11)

10:1 or 1:10

  • ·        80% nickel iron core EI-48x16, permalloy!
    ·        Encapsulated with solder taps
    ·        Teflon tape insulation
    ·        Usage: galvanic isolation, system with too much/less gain, for driving low impedance stages / cables (step down configuration)
    ·        60k: 600 Ohm (5:1) step-down or step-up
    ·        20Hz – 20kHz @ +/- 0.1dB
    ·        Size 50mm (L) x 43mm (W) x 43mm (H)
    ·        U$276/pair
 
1+1 : 1+1 inter-stage transformer

  • ·        Japanese Z11 EI-57x30 core
    ·        Solder taps
    ·        DCR 400 Ohm per winding
    ·        4K + 4K : 4K + 4K (output ~100V rms)
    ·        Maximum primary current 30mA
    ·        Recommended for driver tubes with <4K Rp
    ·        20Hz – 20kHz @ +/- 0.1dB
    ·        Size 59mm (L) x 57mm (W) x 51mm (H)
    ·        U$137/pair

0.5H / 0.5A choke for DAC power supply

  • ·        <4 Ohm DCR
    ·        Nickel plated copper encapsulation for extreme low noise emission
    ·        Solder taps
    ·        Suitable for either CLC or LCL topology
    ·        Size 50mm (L) x 43mm (W) x 34.5mm (H)
    ·        U$31

8H / 150mA choke for tube power supply

  • ·        100 Ohm DCR
    ·        Encapsulated with solder taps
    ·        Size 59mm (L) x 52mm (W) x 51mm (H)
    ·        U$28

5H / 220mA choke for tube power supply

  • ·        47 Ohm DCR
    ·        Encapsulated with solder taps
    ·        For CLC or LC (400V below)
    ·        Size 59mm (L) x 57mm (W) x 51mm (H)
    ·        U$37

60H / 30mA plate choke (audio frequency)

  • ·        Japanese Z11 core
    ·        Encapsulated with solder taps
    ·        Primary DCR 1095 Ohm
    ·        20Hz – 20kHz @ +/- 0.5dB
    ·        Maximum primary current 30mA
    ·        Suitable for 6C45, 5842, 5687 and similar tubes
    ·        Size 50mm (L) x 57mm (W) x 43mm (H)
    ·        U$103 MATCHED PAIR

20H / 50mA choke for tube power supply

  • ·        Nickel plated copper encapsulation for extreme low noise emission
    ·        For choke-input (LC) or cap-input (CLC)
    ·        U$29

7H / 350mA @120Hz

  • ·        Especially for choke input / can be used as cap input too.
    ·        High stability and linearity, maintain 90% inductance at full load.
    ·        High durability build – selected high temperature and high insulation strength wires
    ·        EI-76x50 core, encapsulated with wires drawn
    ·        DRC 77 Ohm, 400mA max
    ·        Size 81mm (L) x 89mm (W) x 69mm (H)
    ·        U$78

Choke for filament/solid-state amplifier

  • ·        2mH 15A DCR 30 mOhm
    o   EI-66x30, 2mm cable size, for CLC use
    o   Tolerate up to 120% overloading
    o   Size 92mm (L) x 63mm (W) x 58mm (H)
    o   US$41

  • ·        230mH 1.6A DCR 1.5 Ohm
    o   EI-66x30, for CLC or LC (choke in)
    o   Tolerate up to 120% overloading
    o   Size 92mm (L) x 63mm (W) x 58mm (H)
    o   U$41

Grid Choke

  • ·        80% nickel iron core, permalloy!
    ·        Encapsulated with solder taps
    ·        Teflon tape insulation
    ·        1200H / 120Hz
    ·        U$104/pair
Special Edition: PX3.5SE MK2 - U$259/pair
  • For: 300B, EL34, and etc
  • Pri: 3.5K, 
  • Sec: 4/8/16 Ohm, 
  • 20W, 90mA.
  • Z11 core, Nylon bobbin
  • Official frequency response: 20Hz – 20kHz +/- 3dB or better (tested to be ~+/- 1.5dB)
  • Special Edition – better bass, flatter frequency response, but lower output power headroom.
Special Edition: PX-3.5SE, PX-5SE - U$399/pair
  • For: 300B, 2A3, EL34, 45 and etc
  • Pri: 3.5K or 5K, 
  • Sec: 4/8/16 Ohm, 
  • 65W, 170mA.
  • Z11 core, Nylon bobbin.
Special Edition: PX2.5SE - U$249/pair
  • For: 300B, 2A3
  • Pri: 2.5K, 
  • Sec: 4/8/16 Ohm, 
  • 25W, 170mA.
  • Z11 core, Nylon bobbin.
Special Edition: Chokes (with end bells)
  • PCH5       - 5H 400mA                   - U$89
  • PCH10A  - 10H 300mA                 - U$89
  • PCH10B  - 10H 250mA (211 use)  - U$89

For custom specifications, or Precision Series price, please email us for quotation.

J&K Audio Design
24/12/2013



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

Iso-trans: link 1, link 2

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* 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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