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Old 7th October 2007, 08:37 AM   #1
00940 is offline 00940  Belgium
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Default Audiovalve RKV schematic (hybrid headphones amp)

A long time ago I was asked by someone on this board if this schematic was available. I just discovered a website on which it is yesterday. The website got the authorization to publish it from the designer (Helmut Becker).

So, the schematic (and everything else you could need) is here : http://www.jogis-roehrenbude.de/Vers.../PCL805-KH.htm

It's a very good headphones amplifier as is, at least for the mid to high impedance headphones (120ohms and above). Well, maybe it could be improved for low impedance ones. With other tubes ?
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Old 7th October 2007, 09:35 AM   #2
Gordy is offline Gordy  United Kingdom
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I may not understand the language but I can read a circuit diagram!

The home page of the site, from the link at the bottom of the page, also has much information.

Thanks for posting this.
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Old 8th October 2007, 12:04 AM   #3
KaDe is offline KaDe  Germany
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Default Audio Valve RKV

Yeah, this amp is great for OTL with Philips 800 Ohm fullrange speakers as well.
I have build mine in the 1980th when it was available from Helmut Becker as a kit.
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