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Tube SPDIF output
Tube SPDIF output
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Old 19th May 2013, 09:33 PM   #21
Pano is offline Pano  United States
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Tube SPDIF output
Well there we go, then! A 6CH6 is indeed designed for 75 ohm video lines. Perfect for SPDIF.
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Old 19th May 2013, 10:18 PM   #22
kevinkr is offline kevinkr  United States
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Tube SPDIF output
Ideal I'd say.. Certain high transconductance triodes configured in SRPP might be good for driving a 75 ohm line as well since this topology saw use for video line driving as well. VHC family cmos logic is so much easier, and undoubtedly would work better without the complication.. lol
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Old 19th May 2013, 10:24 PM   #23
Pano is offline Pano  United States
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Tube SPDIF output
Complication??? Were talking tubes here, buddy.
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Old 6th August 2013, 08:44 AM   #24
hubee is offline hubee  Europe
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Quote:
Originally Posted by Pano View Post
Well there we go, then! A 6CH6 is indeed designed for 75 ohm video lines. Perfect for SPDIF.
Ayon has made a Network Transport (a network music player) with "Vacuum-tube buffered digital output stage". The data sheet says "6H14 tube (digital output - signal buffer)" Network-Transport : Ayon Audio
Is this SPDIF design really bad ?

(the Ayon CD-T is using also 6H14, but that's not important for me... http://www.ayonaudio.com/products/cd...ayer/cd-t.html)

Last edited by hubee; 6th August 2013 at 08:56 AM.
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Old 6th August 2013, 09:00 AM   #25
SY is offline SY  United States
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Tube SPDIF output
See posts 15 and 17. Yes, it will probably work since digital signals are quite robust and can function even through ideas as technically stupid as theirs.
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Old 31st December 2017, 11:37 AM   #26
Lowrideris is offline Lowrideris
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hello, i did lampizator scheme tube output, and ques whtat it sounds better that original spdif output, tryied on philips cd player.
sound is faster, more alive, energetic... totaly recomendet mod... at the same time no digital sound, its more like good vinyl player.
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Old 31st December 2017, 11:52 AM   #27
kodabmx is online now kodabmx  Canada
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I bought and use one of these to connect the computer to the audio system. I like it a lot. 24bit/192KHz TUBE DAC DIY KIT - Lampucera1.0 + Lampizator CS8416 + CS4397 | eBay
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Old 31st December 2017, 01:00 PM   #28
DF96 is offline DF96  England
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Expectation bias is a powerful thing, even when you are aware of expectation bias. It is much more powerful when you deny it.
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Old 31st December 2017, 01:10 PM   #29
Lowrideris is offline Lowrideris
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nope, im profesional electronic specialist. i measured diferences on both spidif outputs.rise times, overshoots and etc.
original has about 8ns rise time , tube out has only 4.5ns, tubehas more ringing on flat ,but thats not important, becouse dac reads only "rise,drop" fronts of signal.
On MCU originaly was also 4.5ns rise time. sooo.... ? tube is like speed of light ....
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Old 31st December 2017, 01:22 PM   #30
DF96 is offline DF96  England
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Rise time which is too fast can increase cable-related jitter.
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