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-   -   KT66/EL34 single end class A integrated amplifier (http://www.diyaudio.com/forums/twin-audio/165463-kt66-el34-single-end-class-integrated-amplifier.html)

Musik007 20th April 2010 05:34 PM

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.

http://i30.photobucket.com/albums/c3...an/KT66-01.jpg

http://i30.photobucket.com/albums/c3...an/KT66-02.jpg

http://i30.photobucket.com/albums/c3...an/KT66-03.jpg

AlejandroR 20th April 2010 07:39 PM

Can you please add more information. output power, number of inputs, price ?

Musik007 21st April 2010 02:24 PM

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.

AlejandroR 21st April 2010 02:36 PM

The amp is flying from Miami to Santiago according to DHL tracking. Hope to receive it tomorrow.

Musik007 21st April 2010 02:41 PM

3 inputs and 4 ohms and 8 ohms outputs for speakers. The AC input is 220V.

http://i30.photobucket.com/albums/c3...an/KT66-18.jpg

http://i30.photobucket.com/albums/c3...an/KT66-19.jpg

http://i30.photobucket.com/albums/c3...an/KT66-21.jpg

Musik007 21st April 2010 02:47 PM

Great!

Quote:

Originally Posted by AlejandroR (Post 2161278)
The amp is flying from Miami to Santiago according to DHL tracking. Hope to receive it tomorrow.


Musik007 21st April 2010 03:27 PM

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.

http://i30.photobucket.com/albums/c3...an/KT66-04.jpg

http://i30.photobucket.com/albums/c3...an/KT66-05.jpg

KT66 @ The National Valve Museum

Musik007 21st April 2010 05:02 PM

Electron KT66 (Made by Shuguang, China) is a nice KT66 with good construction. The price is affordable.

http://i30.photobucket.com/albums/c3...an/KT66-08.jpg

http://i30.photobucket.com/albums/c3...an/KT66-07.jpg

Musik007 23rd April 2010 06:17 PM

Dimension of the amplifer: 340W x 280D (including knob and binding post) x 185H mm
N. W.: 12.5 KG

Musik007 24th April 2010 06:09 PM

Russia re-issued Tung-sol KT66 is also worth to try.

http://i30.photobucket.com/albums/c3.../KT66SE-38.jpg


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