New EL34/6CA7/KT66 integrated amplifier

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Our second new tube amplifier in May is available now. The circuit is 6SN7 SRPP drive EL34 class A single end. It's a simple EL34 single end circuit with pure class A sound. The output power is 7W. 6CA7 and KT66 are also suitable for this amplifier.

Dimension of the amp: 365W x 320D(inclu. binding posts and knobs) x 200H mm.
Net Weight: 11.8 KG

Can directly replace KT66 onto the amplifier. It is very easy to listen and experience different sound on the power tubes.

 

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We now offer a promotional price for this amplifier, USD438 including Russia 6H8C(=6SN7), China Shuguang EL34-B and 5Z3P(=5U4G). The amplifier was designed, made and soldered by Thomas.

 

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This is one of typical layout of tube amp.

 

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These are old 6H8C twin triodes which were made in Soviet Union. The specification of 6H8C is same as 6SN7.

 

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The output transformers are made with H10 EI 86 x 40 mm x 0.35mm steel cores. The primary impedance is 3.8K and secondary impedance is 0-4-8 ohms. The output power is 15W.

 

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Italy made Itelcond 470uF/450VDC electrolytic capacitors handle CLC filtering with choke. High quality and stable.

 

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The power transformer is 200VA EI 96 x 60 x 0.35mm steel core. The output voltage is 290V-0-290V/250mA.

We can order the power transformers in other voltages like 100V, 110V and 230V, etc.

 

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One pair audio input and no selector used ensures direct signal path. The RCA sockets are CMC long style.

 

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There is a speaker output switch at the back. Can select either 4 ohms or 8 ohms on the switch.

 

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The voltage of this amp is 220V.

 

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We selected this solid aluminium knob in size 33 dia. x 22H mm for this series.

 

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Can directly replace KT66 onto the amplifier to experience different sound with EL34.

 

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The chassis is fine quality steel case in 1.5 mm thickness in black color.

 

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Side view.

 

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Have a view at the rear panel.

 

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This is China Shuguang KT66. Nice sound. Still can buy in the market.

 

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See the internal design and structure of the circuit. This is the workmanship of Thomas.

 

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The heart of this tube amplifier.

 

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Japanese Matsushita 100uF/100V capacitors (blue caps) for the cathodes of 6SN7 and EL34 are used in this amp.

 

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The coupling capacitors between 6SN7 and EL34 are red TRW 0.20uF film caps. The performance of TRW is neutral and stable. The caps' long feet is very easy to use to make tube amp.