KT66/EL34 single end class A integrated amplifier

Musik007 · 20th April 2010, 05:34 PM

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.

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.

Musik007 · 21st April 2010, 02:47 PM

Great!

Quote:

Originally Posted by AlejandroR

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.

KT66 @ The National Valve Museum

Musik007 · 05:37 AM

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

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.

20th April 2010, 05:34 PM	#1
Musik007 diyAudio Member Join Date: Nov 2009	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.

21st April 2010, 05:02 PM	#8
Musik007 diyAudio Member Join Date: Nov 2009	Electron KT66 (Made by Shuguang, China) is a nice KT66 with good construction. The price is affordable. Last edited by Musik007; 22nd April 2010 at 05:37 AM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
EF95-EL84 single end integrated amplifier	Musik007	Twin Audio	42	7th December 2019 07:43 AM
6L6 class A single end amplifier	Musik007	Twin Audio	33	28th April 2010 06:18 PM
6SL7-EL34 single end integrated amplifier	Musik007	Twin Audio	4	11th March 2010 03:35 PM

New To Site?	Need Help?
Register to Participate Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

20th April 2010, 07:39 PM	#2
AlejandroR diyAudio Member Join Date: Jun 2006 Location: Santiago, CHILE	Can you please add more information. output power, number of inputs, price ?

21st April 2010, 02:24 PM	#3
Musik007 diyAudio Member Join Date: Nov 2009	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.

21st April 2010, 02:36 PM	#4
AlejandroR diyAudio Member Join Date: Jun 2006 Location: Santiago, CHILE	The amp is flying from Miami to Santiago according to DHL tracking. Hope to receive it tomorrow.

21st April 2010, 02:41 PM	#5
Musik007 diyAudio Member Join Date: Nov 2009	3 inputs and 4 ohms and 8 ohms outputs for speakers. The AC input is 220V.

21st April 2010, 03:27 PM	#7
Musik007 diyAudio Member Join Date: Nov 2009	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. KT66 @ The National Valve Museum

23rd April 2010, 06:17 PM	#9
Musik007 diyAudio Member Join Date: Nov 2009	Dimension of the amplifer: 340W x 280D (including knob and binding post) x 185H mm N. W.: 12.5 KG

24th April 2010, 06:09 PM	#10
Musik007 diyAudio Member Join Date: Nov 2009	Russia re-issued Tung-sol KT66 is also worth to try.