diyAudio

diyAudio (https://www.diyaudio.com/forums/index.php)
-   Digital Source (https://www.diyaudio.com/forums/digital-source/)
-   -   Pioneer PD-6500 audio output (https://www.diyaudio.com/forums/digital-source/205193-pioneer-pd-6500-audio-output.html)

GoranB 24th January 2012 08:35 AM

Pioneer PD-6500 audio output
 
2 Attachment(s)
Hello,
Does anyone know if i could implement a tube output instead of opamps?

Osvaldo de Banfield 24th January 2012 10:56 AM

Yes, it is possible, but what about space (Transformers, capacitors, tubes, sockets, etc), and a high voltage source availability inside the apparatus??

GoranB 24th January 2012 11:01 AM

I have some ECC82, ECC83, ECC81 also PCC88, i have socketc for them too, the anode voltage 200-250V. Space wont be a problem as I can build a PSU in a separated box.

Osvaldo de Banfield 24th January 2012 11:18 AM

Quote:

Originally Posted by GoranB (https://www.diyaudio.com/forums/digital-source/205193-pioneer-pd-6500-audio-output-post2875944.html#post2875944)
I have some ECC82, ECC83, ECC81 also PCC88,

None of the tubes above mentioned is a power stage, they can work as headphone drivers, but no loudspeakers. Think n a triode-pentode like ECL82/85 for a 3-5W audio output. And 200V DC 100Ma for stereo, and 6.3V 2Amper for heaters.

GoranB 24th January 2012 01:16 PM

Quote:

Originally Posted by Osvaldo de Banfield (https://www.diyaudio.com/forums/digital-source/205193-pioneer-pd-6500-audio-output-post2875959.html#post2875959)
None of the tubes above mentioned is a power stage, they can work as headphone drivers, but no loudspeakers. Think n a triode-pentode like ECL82/85 for a 3-5W audio output. And 200V DC 100Ma for stereo, and 6.3V 2Amper for heaters.

Well, maybe my english is a problem here to describe what i need. I dont need a power amp, but schematic for audio circuit based on tubes which will replace the opamps based audio analog circuit in this player.

stephensank 24th January 2012 04:57 PM

The dac is differential output, but it is voltage output, so you simply need a differential input tube stage that is fairly low gain. Alternatively, you could use the dac's voltage outs to drive a transformer, then feeding a single ended tube stage.

GoranB 25th January 2012 04:53 AM

Quote:

Originally Posted by stephensank (https://www.diyaudio.com/forums/digital-source/205193-pioneer-pd-6500-audio-output-post2876298.html#post2876298)
The dac is differential output, but it is voltage output, so you simply need a differential input tube stage that is fairly low gain. Alternatively, you could use the dac's voltage outs to drive a transformer, then feeding a single ended tube stage.

Thanks for the reply Stephensank

Yes, its differential, probably it means i have to build a differential input stage , then gain stage and in the end the buffer stage. I wonder if there is some tested schematic where all these stages are included. Could you help about this?

SoNic_real_one 25th January 2012 10:29 AM

Having OpAmps inside the DAC, as I/V converters, there is absolutelly no real purpouse to use tubes after that.


All times are GMT. The time now is 04:28 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 17.65%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio

Wiki