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Old 13th December 2006, 03:55 AM   #1
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Default Tube Output Full digital Amplifier

I think it is possible to conbine good old Tubes and today's full digital technologies.

maybe I'm so tired with heavy working right before holiday??
(everyone says before holiday! before holiday! how about you?)
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Old 14th December 2006, 04:20 AM   #2
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Location: Wisconsin....what did you expect?
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Default Re: Tube Output Full digital Amplifier

Quote:
Originally posted by KOON3876
I think it is possible to conbine good old Tubes and today's full digital technologies.

maybe I'm so tired with heavy working right before holiday??
(everyone says before holiday! before holiday! how about you?)

Unless you've got a tube that can switch at 600khz or more, then I don't think there's much point.
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Old 14th December 2006, 06:10 AM   #3
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Default Re: Re: Tube Output Full digital Amplifier

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Originally posted by Spasticteapot
Unless you've got a tube that can switch at 600khz or more, then I don't think there's much point.
That is easy..
Tubes are used for Transmitter for AM/FM/Ham or GHz Radars.
Don't you remember old TVs had many tubes inside?
They were working for TV frequency.

Anyway just a tired businessman's daydream
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Old 14th December 2006, 08:59 AM   #4
Pano is offline Pano  United States
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There was a thread on this subject about a year or more ago.

Didn't it come up in search?
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Old 14th December 2006, 10:31 AM   #5
Pano is offline Pano  United States
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Ah Ha! Here it is:

Tubes in Class-D

Almost exactly a year ago. A fun idea, tho not very practical. You might want to read thru it. It's worth a try, if for nothing more than the fun factor.
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Old 14th December 2006, 12:06 PM   #6
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IIRC, Norman Crowhurst wrote about this in the early '60s. It may be worth poking around to see if you can find his papers. They may have been reprinted in Audio Amateur.
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Old 14th December 2006, 03:50 PM   #7
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You can see Sullivan's patent on an all tube amp. It includes a schematic.
Go to: http://patft.uspto.gov/netahtml/PTO/search-bool.html
And search all fields for 03011025
Select the date: 1790 to present
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Old 14th December 2006, 04:18 PM   #8
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Quote:
Originally posted by panomaniac
Ah Ha! Here it is:

Tubes in Class-D

Almost exactly a year ago. A fun idea, tho not very practical. You might want to read thru it. It's worth a try, if for nothing more than the fun factor.
Oh I did not search because I posted as reply on "Forum for issues related to the design of Class D amplifiers" then moved by moderator to new thread.
Nothing more than the fun, but maybe sound will have Tube fravor
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Old 14th December 2006, 05:54 PM   #9
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You can add a "tube flavor" with signal processing. (distortion, compression, EQ)
Trying to add it on the output stage would be a mistake. Especially when you want to turn it off.
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