6L6 class A single end amplifier

Musik007 · 25th March 2010, 06:10 PM

There are lots of 6L6 class A single end circuits. We designed this special circuit which used the classic pentode tube, 6SJ7 as voltage amplifying stage and drive 6L6 or 5881, with tube rectifier 5Z4 or 5Y3. The output power is 6.5W in pentode connection of class A. It is powerful enough to drive loudspeakers at and over 87 dB. It well-matches Mark Audio full range drivers like CHR-70 and Alpair 7.

Specification:
AC input: 220V
Power output: 6.5W
Output impedance: 4 & 8 ohms
3 signal inputs
Frequency Response: 25Hz - 30KHz (-1 dB)
Power consumption: 80W
Dimension: 340W x 230D x 160H mm
N.W.: approx. 10KG

Special Price: USD290.

Musik007 · 26th March 2010, 03:29 PM

150W EI power transformer gives enough power for 6L6 single end amplifier.

Musik007 · 26th March 2010, 05:04 PM

The output transformers for 6L6 single end:
Output power: 13W
Frequency response: 20Hz-25KHz
Primary impedance: 3.5K
Secondary impedance: 4 ohms and 8 ohms

Choke: 10H/300mA

johngalt47 · 26th March 2010, 09:42 PM

Is $290 for a completely finished amplifier?

Musik007 · 27th March 2010, 03:36 AM

Yes, USD290 for a completely finished amplifier with Chinese tubes.

Thanks.
Tony.

Musik007 · 05:20 PM

Need to clear some stocks before new models come in. Only one left for this model.

freddi · 27th March 2010, 04:42 PM

what's shipping to US?

Musik007 · 27th March 2010, 05:22 PM

Quote:

Originally Posted by freddi

what's shipping to US?

Let me check the shipping cost.

Thanks.
Tony.

Musik007 · 30th March 2010, 08:54 AM

Quote:

Originally Posted by freddi

what's shipping to US?

The shipping cost from Hong Kong to USA is around USD180 via Speedpost.

Thanks.

Musik007 · 30th March 2010, 09:02 AM

The amplifier was designed and soldered by Thomas.

25th March 2010, 06:10 PM	#1
Musik007 diyAudio Member Join Date: Nov 2009	6L6 class A single end amplifier There are lots of 6L6 class A single end circuits. We designed this special circuit which used the classic pentode tube, 6SJ7 as voltage amplifying stage and drive 6L6 or 5881, with tube rectifier 5Z4 or 5Y3. The output power is 6.5W in pentode connection of class A. It is powerful enough to drive loudspeakers at and over 87 dB. It well-matches Mark Audio full range drivers like CHR-70 and Alpair 7. Specification: AC input: 220V Power output: 6.5W Output impedance: 4 & 8 ohms 3 signal inputs Frequency Response: 25Hz - 30KHz (-1 dB) Power consumption: 80W Dimension: 340W x 230D x 160H mm N.W.: approx. 10KG Special Price: USD290.

26th March 2010, 09:42 PM	#4
johngalt47 RIP Join Date: Mar 2004 Location: Kentucky	Is $290 for a completely finished amplifier? __________________ Any technology sufficiently advanced is indistinguishable from magic

27th March 2010, 03:56 PM	#6
Musik007 diyAudio Member Join Date: Nov 2009	Need to clear some stocks before new models come in. Only one left for this model. Last edited by Musik007; 27th March 2010 at 05:20 PM.

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26th March 2010, 03:29 PM	#2
Musik007 diyAudio Member Join Date: Nov 2009	150W EI power transformer gives enough power for 6L6 single end amplifier.

26th March 2010, 05:04 PM	#3
Musik007 diyAudio Member Join Date: Nov 2009	The output transformers for 6L6 single end: Output power: 13W Frequency response: 20Hz-25KHz Primary impedance: 3.5K Secondary impedance: 4 ohms and 8 ohms Choke: 10H/300mA

27th March 2010, 03:36 AM	#5
Musik007 diyAudio Member Join Date: Nov 2009	Yes, USD290 for a completely finished amplifier with Chinese tubes. Thanks. Tony.

27th March 2010, 04:42 PM	#7
freddi diyAudio Member Join Date: Aug 2005	what's shipping to US?

30th March 2010, 09:02 AM	#10
Musik007 diyAudio Member Join Date: Nov 2009	The amplifier was designed and soldered by Thomas.