Tube Output Full digital Amplifier

KOON3876 · 13th December 2006, 04:55 AM

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?)

Spasticteapot · 14th December 2006, 05:20 AM

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.

KOON3876 · 14th December 2006, 07:10 AM

Quote:

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

Pano · 14th December 2006, 09:59 AM

There was a thread on this subject about a year or more ago.

Didn't it come up in search?

Pano · 14th December 2006, 11:31 AM

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.

SY · 14th December 2006, 01:06 PM

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.

raintalk · 14th December 2006, 04:50 PM

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

KOON3876 · 14th December 2006, 05:18 PM

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

raintalk · 14th December 2006, 06:54 PM

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.

14th December 2006, 09:59 AM	#4
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	There was a thread on this subject about a year or more ago. Didn't it come up in search? __________________ Take the Speaker Voltage Test!

14th December 2006, 11:31 AM	#5
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	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. __________________ Take the Speaker Voltage Test!

14th December 2006, 01:06 PM	#6
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	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. __________________ "...we stumble and get up, we are sad, confident, insecure, feel loneliness and joy and love. There is nothing more; but I want nothing more.” - Christopher Hitchens 1949-2011

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14th December 2006, 04:50 PM	#7
raintalk diyAudio Member Join Date: Jul 2004 Location: Seattle USA	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

14th December 2006, 06:54 PM	#9
raintalk diyAudio Member Join Date: Jul 2004 Location: Seattle USA	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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