New EL34/6CA7/KT66 integrated amplifier - diyAudio
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Twin Audio Twin Audio is a manufacturer of hand made audiophile tube amplifiers.

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Old 21st May 2010, 05:25 PM   #1
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Default New EL34/6CA7/KT66 integrated amplifier

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.

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Dimension of the amp: 365W x 320D(inclu. binding posts and knobs) x 200H mm.
Net Weight: 11.8 KG
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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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Last edited by Musik007; 26th May 2010 at 04:16 PM. Reason: adding new photos
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Old 21st May 2010, 05:33 PM   #2
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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.

Last edited by Musik007; 4th December 2010 at 03:54 AM.
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Old 23rd May 2010, 04:20 PM   #3
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This is one of typical layout of tube amp.
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Old 26th May 2010, 03:46 PM   #4
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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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Old 26th May 2010, 04:27 PM   #5
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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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Last edited by Musik007; 26th May 2010 at 05:00 PM.
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Old 26th May 2010, 04:53 PM   #6
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Italy made Itelcond 470uF/450VDC electrolytic capacitors handle CLC filtering with choke. High quality and stable.
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File Type: jpg 6sn7-el34-07.jpg (742.8 KB, 76 views)
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Old 26th May 2010, 05:41 PM   #7
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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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Old 27th May 2010, 04:05 PM   #8
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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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Old 28th May 2010, 04:45 PM   #9
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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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File Type: jpg 6sn7-el34-15.jpg (809.0 KB, 68 views)
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Old 29th May 2010, 04:47 PM   #10
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The voltage of this amp is 220V.
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