JLH Class A headphone amplifier

jamesfeline · 24th August 2010, 08:18 PM

Hello

Please find some pics of my recently completed JLH class A headphone amplifier. The unit uses volume remote control, and all mains power wiring are hidden under the suspended chassis .. I done this to try and make the wiring more neater. I will be upgrading to burr dog agapters with better omp amps soon. The panel has been laser engraved on the back, the feet I made myself etc, the sound is 1st class.

all the best

JamesFeline

kannan_s · 24th August 2010, 08:39 PM

You make Linseley Hood proud - outstanding workmanship -better than many comercial product -
congratulations
you can make this service available to other DIyers !
kannan

jamesfeline · 24th August 2010, 08:52 PM

Hello

I was thinking of putting this unit on ebay if any one was interested? the volatge is 230v but I can convert to 110 or 120. The unit comes with a mini remote as well. I have been making DIY amplifiers for the last 25 years .. so practice makes purfect I suppose. The sound of this unit is amazing, watch this space for more builds from my log cabin ...

burbeck · 25th August 2010, 12:10 AM

great looking construction James, which version of J L Hood amp is it?

regards
bob

colin.hepburn2 · 25th August 2010, 12:34 AM

Hi All
Well JLH Headphone Fans

Here is a Headphone version of the JLH single ended Class A speaker Amp that you all maybe interested in I am collecting the parts so haven’t build it as yet

jamesfeline · 25th August 2010, 10:57 AM

The version is the class a Chairria version single ended, the op amps will be the 627 version (metal can type) these are very expensive at £27 each. The remote pcb was purchased from Altronics. At the time I did not have a blue velvet alps pot so used the one that came with the kit .. sounds good to my ears and all who listened to the unit.

regards

Nick

Mario_JR · 28th August 2010, 07:43 PM

How much one of this would cost?
Do you have the specs?
Thanks!

jamesfeline · 29th August 2010, 04:41 PM

Hello

I will be putting this unit on ebay to make way for my next project, this unit is made to the highest standards. The start bid will be £100, trust me what ever the unit does sell for will still be well below the cost that it would be if you made the unit yourself. If anyone is interested in a special comission of the headphone amp (i.e I make the kit for you) please email me or send me a private PM

regards

Nick

Dr. Popo · 4th September 2010, 03:32 PM

i do not see any op amp in jlh schematic? where would you use 627? thanks peter

owenhamburg · 5th September 2010, 01:38 PM

A little off topic but ....

I saw this a "JHL Class A headphone amplifier earphone AMP / preamp" in the ebay store of along1986090 from china. It looks like a normal JLH 10W amplifier with the bias current terned down for head phone use at least from the large picture. I will let you know when it arrives. For 20 UKP including shipping (approximately 25 euro) I thought it was worth a try anyway.

24th August 2010, 08:18 PM	#1
jamesfeline diyAudio Member Join Date: Feb 2006 Location: Essex	JLH Class A headphone amplifier Hello Please find some pics of my recently completed JLH class A headphone amplifier. The unit uses volume remote control, and all mains power wiring are hidden under the suspended chassis .. I done this to try and make the wiring more neater. I will be upgrading to burr dog agapters with better omp amps soon. The panel has been laser engraved on the back, the feet I made myself etc, the sound is 1st class. all the best JamesFeline

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24th August 2010, 08:39 PM	#2
kannan_s diyAudio Member Join Date: Jun 2009	You make Linseley Hood proud - outstanding workmanship -better than many comercial product - congratulations you can make this service available to other DIyers ! kannan

24th August 2010, 08:52 PM	#3
jamesfeline diyAudio Member Join Date: Feb 2006 Location: Essex	Hello I was thinking of putting this unit on ebay if any one was interested? the volatge is 230v but I can convert to 110 or 120. The unit comes with a mini remote as well. I have been making DIY amplifiers for the last 25 years .. so practice makes purfect I suppose. The sound of this unit is amazing, watch this space for more builds from my log cabin ...

25th August 2010, 12:10 AM	#4
burbeck diyAudio Member Join Date: Aug 2004 Location: Ratae Coritanorum	great looking construction James, which version of J L Hood amp is it? regards bob

25th August 2010, 10:57 AM	#6
jamesfeline diyAudio Member Join Date: Feb 2006 Location: Essex	The version is the class a Chairria version single ended, the op amps will be the 627 version (metal can type) these are very expensive at £27 each. The remote pcb was purchased from Altronics. At the time I did not have a blue velvet alps pot so used the one that came with the kit .. sounds good to my ears and all who listened to the unit. regards Nick

28th August 2010, 07:43 PM	#7
Mario_JR diyAudio Member Join Date: Jan 2005 Location: Sao Paulo	How much one of this would cost? Do you have the specs? Thanks!

29th August 2010, 04:41 PM	#8
jamesfeline diyAudio Member Join Date: Feb 2006 Location: Essex	Hello I will be putting this unit on ebay to make way for my next project, this unit is made to the highest standards. The start bid will be £100, trust me what ever the unit does sell for will still be well below the cost that it would be if you made the unit yourself. If anyone is interested in a special comission of the headphone amp (i.e I make the kit for you) please email me or send me a private PM regards Nick

4th September 2010, 03:32 PM	#9
Dr. Popo diyAudio Member Join Date: Apr 2009	i do not see any op amp in jlh schematic? where would you use 627? thanks peter

5th September 2010, 01:38 PM	#10
owenhamburg diyAudio Member Join Date: Oct 2009 Location: Hamburg	A little off topic but .... I saw this a "JHL Class A headphone amplifier earphone AMP / preamp" in the ebay store of along1986090 from china. It looks like a normal JLH 10W amplifier with the bias current terned down for head phone use at least from the large picture. I will let you know when it arrives. For 20 UKP including shipping (approximately 25 euro) I thought it was worth a try anyway.

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