100V EL34 Single End Class A amplifier - diyAudio
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Old 31st May 2010, 02:31 PM   #1
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Default 100V EL34 Single End Class A amplifier

This new EL34 single end class A integrated amplifier is 100V version and specially made for a Japanese customer. The circuit is classic 6SL7 twin triode drive EL34 in SRPP mode. It is a typical EL34 class A amplifier in pentode connection. The output power of this amp is 7W.

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Last edited by Musik007; 26th September 2011 at 03:15 PM.
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Old 1st June 2010, 03:29 PM   #2
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The dimension of the amplifier is 365W x 300D x 200H mm.
Net Weight: approx. 13 KG.
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File Type: jpg EL34-100V-06.jpg (815.1 KB, 764 views)
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Old 5th June 2010, 05:22 PM   #3
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Russian 6H9C (made in CCCP) and China Shuguang EL34-B and 5AR4 recitier.
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Old 8th June 2010, 04:45 PM   #4
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The current meter displays the total plate current in ma for all the tubes in the amp.
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Old 13th June 2010, 04:59 AM   #5
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The power supply for EL34 SE amplifer, a 250VA EI power transformer, Cornell Dubiler 320uF/450VDC electrolytic capacitors and 10H/250mA choke were used. The CLC filtering circuit and the parts we seriously selected and applied keep high S/N ratio and very low noise of this amp. I can not hear any hum from my speakers.
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File Type: jpg EL34-100V-11.jpg (809.3 KB, 44 views)
File Type: jpg EL34-100V-10.jpg (808.5 KB, 30 views)
File Type: jpg EL34-100V-09.jpg (797.9 KB, 20 views)
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Old 13th June 2010, 05:05 AM   #6
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This is the power transformer which is custom-made for this amplifer.
Power: 250VA.
Steel core: EI H14 in 0.35 mm thickness
Core size: 96x67mm.
Attached Images
File Type: jpg EL34-09.jpg (795.7 KB, 23 views)
File Type: jpg EL34-06.jpg (822.3 KB, 37 views)
File Type: jpg EL34-11.jpg (804.1 KB, 30 views)

Last edited by Musik007; 13th June 2010 at 05:08 AM.
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Old 23rd June 2010, 05:09 PM   #7
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The rear panel of this amp is simple.
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File Type: jpg EL34-100V-14.jpg (801.7 KB, 45 views)
File Type: jpg EL34-100V-15.jpg (787.3 KB, 81 views)
File Type: jpg EL34-100V-16.jpg (783.2 KB, 87 views)
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Old 2nd July 2010, 03:42 PM   #8
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4 ohms and 8 ohms speaker outputs are for option.
One set signal input.
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File Type: jpg EL34-100V-21.jpg (786.5 KB, 54 views)
File Type: jpg EL34-100V-17.jpg (742.6 KB, 24 views)
File Type: jpg EL34-100V-18.jpg (743.0 KB, 26 views)
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Old 7th July 2010, 03:29 PM   #9
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Thanks Thomas to make a lot effort to make this pretty amp. The internal structure is organized and tidy.
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Old 7th July 2010, 06:26 PM   #10
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Quote:
Originally Posted by Musik007 View Post
Thanks Thomas to make a lot effort to make this pretty amp. The internal structure is organized and tidy.

cute enough, indeed:

if this product is for sale, what is the price and shipping origin?
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