KT66/EL34 single end class A integrated amplifier - diyAudio
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Old 20th April 2010, 04:34 PM   #1
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Default KT66/EL34 single end class A integrated amplifier

This is our another EL34/KT66 single end class A amplifier. Thomas designed circuit of 6SJ7 pentode in triode connection to drive KT66 or EL34. The rectifier is 5AR4 or 5U4G.

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Old 20th April 2010, 06:39 PM   #2
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Can you please add more information. output power, number of inputs, price ?
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Old 21st April 2010, 01:24 PM   #3
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Hi Alejandro,

In this single end class A amplifier, KT66 is under pentode connection and output power is 7W. There are 3 inputs and 4 ohms and 8 ohms ouptut for speakers.
This KT66 amplifier was well designed and soldered by Thomas. The capacitors were seriously selected. I bought NOS TCC Metalpack 0.25uF capacitors and used between 6SJ7 and KT66. Mcap electrolytic capacitor, 33+33uF/450VDC was used for power filtering. The price is USD650 including Chinese tubes.

Have you received the 6L6 amp?

Thanks.
Tony.
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Old 21st April 2010, 01:36 PM   #4
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The amp is flying from Miami to Santiago according to DHL tracking. Hope to receive it tomorrow.
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Old 21st April 2010, 01:41 PM   #5
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3 inputs and 4 ohms and 8 ohms outputs for speakers. The AC input is 220V.

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Old 21st April 2010, 01:47 PM   #6
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Great!

Quote:
Originally Posted by AlejandroR View Post
The amp is flying from Miami to Santiago according to DHL tracking. Hope to receive it tomorrow.
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Old 21st April 2010, 02:27 PM   #7
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KT66 is a high slope, indirectly heated beam tetrode designed principally for use in the output stage of audio amplifier. The KT66 was essentially a 6L6 redesigned with a larger cathode and a shorter, fatter anode.

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KT66 @ The National Valve Museum
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Old 21st April 2010, 04:02 PM   #8
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Electron KT66 (Made by Shuguang, China) is a nice KT66 with good construction. The price is affordable.

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Last edited by Musik007; 22nd April 2010 at 04:37 AM.
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Old 23rd April 2010, 05:17 PM   #9
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Dimension of the amplifer: 340W x 280D (including knob and binding post) x 185H mm
N. W.: 12.5 KG
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Old 24th April 2010, 05:09 PM   #10
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Russia re-issued Tung-sol KT66 is also worth to try.

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