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Tuesday, November 24, 2015

15K Primary Impedance Output Transformer

High primary impedance (>10K Ohm) has always been a challenge for most winders. Unfortunately, such high primary impedance are required for older tubes, like 6J5G, 6SN7, 801A and etc, that have Rp (internal plate impedance) of ~4K Ohm.


Here's a preview of the upcoming 15K OPT for 801A and similar tubes: 


20Hz to 20kHz TOTALLY FLAT
Full bandwidth: 10Hz (-0.5dB) to 60kHz (-3dB), measured with 801A tube in actual performing circuit.

J&K Audio Design

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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.

Monday, November 16, 2015

输出变压器review

Greetings.

We have another output transformer (输出变压器) review from one of our customers. Sri is using our ALIS-5SE Ultimate for his 300B project.

Attached is the picture of his creation, and also the schematic for your reference. 

It is a 2 stage all direct heated Triode amplifier. It is using EML 30 tube to drive 300B. Interesting minimalism design!





Kudos to Sri for his effort, and 5% discount on his next purchase for sharing the details with us on using our products. Again, for those that are new to our blog, we offer 5% discounts for feedback obtained, sharing the details on the design, pictures and any that our users would like to publish.

J&K Audio Design

Product Lists  

Level 0

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.

11/16/2015

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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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