Class A headphone amp

HiFi, LoFi, Tubes, Transistors, ICs, Commercial, DIY

Postby tekko » Wed May 30, 2007 12:00 am

Hello!

I found this amp in the basement for some time ago and descided to replace the output transistors that i had stolen a few years ago and connect it to a cd-rom drive and a pc power supply, and sure thing it worked on the first try.

Unfortunately this amp was given to me few years back while hunting heatsinks so i have no documentation on it what so ever

I must say it has very good sound quality, i have it hooked up to a pair of old 4ohm speakers.

Heres a pic:
[IMG]http://hififorum.knaak.dk/Tekko/class%20a%20hp%20amp/stereo.JPG[/IMG]
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Postby Guest » Wed May 30, 2007 12:00 am

The PCB number is 83022, my EIT tells me it's the Interlude amplifier from the April 1983 issue. Wow that seems like ages ago. I guess Elektor sales will be able to supply a copy of the article.

hope this helps,
GonzoR


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Postby tekko » Wed May 30, 2007 12:00 am

I emailed EE a week ago and got the answer that they would supply a copy of the article, but a week has passed and they havent came back to me yet.
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Postby nigeljking » Wed May 30, 2007 12:00 am

If they are unable to assist I can scan the original article and email it to you (yes a very long term Elektor reader, starting in 1980 and going ever since).

I actually built all of the modules in this amp but then never used them (they are still sitting forlornly in my garage) as I became enthused about a Ben Duncan design, building and using that until now. This unit is about to be replaced by the Elektor High End Preamp.

I guess my failing enthusiasm for the design was the fear over the crosstalk figures published at the time (around 45dB if I recall), and the related considerable PCB switching paths. But good to hear that you are still impressed with the sound quality of one of the sub modules. I have been extremely impressed with the sound quality of other Elektor projects I have built. I still continue to be impressed with the Crescendo compared to other commercial offerings.

Nigel
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Postby tekko » Wed May 30, 2007 12:00 am

Yes please.

Email to: optran_4k@hotmail.com
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Postby nigeljking » Wed May 30, 2007 12:00 am

Done - all 2.5Mb
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Postby tekko » Wed May 30, 2007 12:00 am

Thanx
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Postby arindamcc » Sun Feb 24, 2008 12:00 am

If anybody have prelude complete article which is published 1983. PCB number 83022-1 to 83022-10. I have the complete article in spanish format but donot know spanish. Please send me the complete article in PDF format. My email address is arindamcc@gmail.com. Please Help me.
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Postby Elektor Editor » Mon Feb 25, 2008 12:00 am

send a request to

sales at elektor dot com

Jan
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