Comments on: A Vacuum Fluorescent Display as a headphone amplifier http://www.5volt.eu/archives/62 A mean to organize, document and share some of the things I do Sun, 27 Jun 2010 17:51:32 +0200 http://wordpress.org/?v=2.9.1 hourly 1 By: admin http://www.5volt.eu/archives/62/comment-page-1#comment-443 admin Mon, 17 May 2010 10:14:06 +0000 http://www.5volt.eu/?p=62#comment-443 @Palomar Jack, the project is old but the parts are still there : I'll try your idea when I have time. Thank you for pointing this out. For now I'm after a russian 3" cathodic ray tube ! Alessandro @Palomar Jack, the project is old but the parts are still there : I’ll try your idea when I have time. Thank you for pointing this out.
For now I’m after a russian 3″ cathodic ray tube !
Alessandro

]]> By: Palomar Jack http://www.5volt.eu/archives/62/comment-page-1#comment-442 Palomar Jack Mon, 17 May 2010 03:23:20 +0000 http://www.5volt.eu/?p=62#comment-442 I know this project is rather old. But, if you put a 100ohm resister between the cathode and ground, move the coupling capacitor and headphone lead there you'll get more power to the phones. This is a low impedance point, about 100 ohms, about the same as the headphones. Adjust the resistance of the plate or anode resistor for the same current as in your displayed circuit. I did this using a 6AQ5 tube in a headphone amplifier in home brew pre-amp I built instead of using dummy load and dropping resistors in the vacuum tube P-P output stage. It sounded very good. You make me proud, "Don't just think outside the box, build a new box". I know this project is rather old. But, if you put a 100ohm resister between the cathode and ground, move the coupling capacitor and headphone lead there you’ll get more power to the phones. This is a low impedance point, about 100 ohms, about the same as the headphones. Adjust the resistance of the plate or anode resistor for the same current as in your displayed circuit. I did this using a 6AQ5 tube in a headphone amplifier in home brew pre-amp I built instead of using dummy load and dropping resistors in the vacuum tube P-P output stage. It sounded very good.

You make me proud, “Don’t just think outside the box, build a new box”.

]]> By: admin http://www.5volt.eu/archives/62/comment-page-1#comment-426 admin Fri, 23 Apr 2010 13:06:41 +0000 http://www.5volt.eu/?p=62#comment-426 Thanks Alex Thanks
Alex

]]> By: Wilin http://www.5volt.eu/archives/62/comment-page-1#comment-425 Wilin Fri, 23 Apr 2010 08:13:29 +0000 http://www.5volt.eu/?p=62#comment-425 You can try using a mosfet as the second stage, making it a hybrid amplifier. Something like this: http://diyaudioprojects.com/Solid/12AU7-IRF510-LM317-Headamp/ (Btw, nice hack!) You can try using a mosfet as the second stage, making it a hybrid amplifier.
Something like this: http://diyaudioprojects.com/Solid/12AU7-IRF510-LM317-Headamp/
(Btw, nice hack!)

]]> By: EllisGL http://www.5volt.eu/archives/62/comment-page-1#comment-423 EllisGL Thu, 22 Apr 2010 19:37:47 +0000 http://www.5volt.eu/?p=62#comment-423 As a speaker: http://www.youtube.com/watch?v=pBZjsUFcKDs&feature=related As a speaker: http://www.youtube.com/watch?v=pBZjsUFcKDs&feature=related

]]> By: VFD as a sound amplifier - Hack a Day http://www.5volt.eu/archives/62/comment-page-1#comment-422 VFD as a sound amplifier - Hack a Day Thu, 22 Apr 2010 15:25:01 +0000 http://www.5volt.eu/?p=62#comment-422 [...] vacuum flourescent displays that he pulled from junked VCRs. His latest project is an experiment to use one of the VFDs as a headphone amplifier. This means he’s trying to use them as vacuum triode amplifiers, aka vacuum tubes. He did get [...] [...] vacuum flourescent displays that he pulled from junked VCRs. His latest project is an experiment to use one of the VFDs as a headphone amplifier. This means he’s trying to use them as vacuum triode amplifiers, aka vacuum tubes. He did get [...]

]]> By: VFD HP amp - Head-Fi: Covering Headphones, Earphones and Portable Audio http://www.5volt.eu/archives/62/comment-page-1#comment-164 VFD HP amp - Head-Fi: Covering Headphones, Earphones and Portable Audio Sun, 04 Jan 2009 18:07:20 +0000 http://www.5volt.eu/?p=62#comment-164 [...] Vacuum Fluorescent Displays (kinda tubes) and thought others here would find it interesting. A Vacuum Fluorescent Display as a headphone amplifier Enjoy, Regards, [...] [...] Vacuum Fluorescent Displays (kinda tubes) and thought others here would find it interesting. A Vacuum Fluorescent Display as a headphone amplifier Enjoy, Regards, [...]

]]> By: Your Gadget Guide » Blog Archive » VFD from VCR generates 40 VDC to power DIY amp http://www.5volt.eu/archives/62/comment-page-1#comment-149 Your Gadget Guide » Blog Archive » VFD from VCR generates 40 VDC to power DIY amp Wed, 10 Dec 2008 03:39:20 +0000 http://www.5volt.eu/?p=62#comment-149 [...] Read | Permalink | Email this | Comments [...] [...] Read | Permalink | Email this | Comments [...]

]]> By: VFD from VCR generates 40 VDC to power DIY amp | Gadgetorium! http://www.5volt.eu/archives/62/comment-page-1#comment-148 VFD from VCR generates 40 VDC to power DIY amp | Gadgetorium! Wed, 10 Dec 2008 02:14:35 +0000 http://www.5volt.eu/?p=62#comment-148 [...] Read | Permalink | Email this | Comments [...] [...] Read | Permalink | Email this | Comments [...]

]]> By: VFD from VCR generates 40 VDC to power DIY amp | The Current Buzz - Tech http://www.5volt.eu/archives/62/comment-page-1#comment-147 VFD from VCR generates 40 VDC to power DIY amp | The Current Buzz - Tech Wed, 10 Dec 2008 01:04:13 +0000 http://www.5volt.eu/?p=62#comment-147 [...] appeared on Engadget on Tue, 09 Dec 2008 12:34:00 EST. Please see our terms for use of feeds.Read | Permalink | Email [...] [...] appeared on Engadget on Tue, 09 Dec 2008 12:34:00 EST. Please see our terms for use of feeds.Read | Permalink | Email [...]

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