I always wanted.. - diyAudio
Go Back   Home > Forums > Member Areas > The Lounge

The Lounge A place to talk about almost anything but politics and religion.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th August 2013, 04:27 AM   #1
diyAudio Member
 
Join Date: Aug 2013
Location: Melbourne
Default I always wanted..

what have you always to buy or build that may or may not be silly, pointless, or asked other idea that gets the ol' "why would you bother? " or "what a waste of time!" response from most.

I've been thinking for a while how hilarious, awesome and pointless it would be to build a pure class D valve amp. all the style and beauty of a valve amp, with efficiency of class D, counteracted by the power hungry valve, with the additional of lowered Fidelity of the class D.

all you would really need to do is remove the output filter network from an existing class D amp and connect the output to the valve. if you had an audio output transformer in there too, it would likely filter out the "carrier wave" or whatever you want to call it, and help with back emf.

point is, it would be uber cool.

what are yours?
  Reply With Quote
Old 14th August 2013, 05:54 AM   #2
zane is offline zane  Australia
diyAudio Member
 
Join Date: Jul 2013
Location: Melbourne
I always wanted to start a silly thread in "The Lounge", but I've done that! Now back to the serious stuff...
  Reply With Quote
Old 14th August 2013, 07:27 AM   #3
Johno is offline Johno  Australia
diyAudio Member
 
Johno's Avatar
 
Join Date: Oct 2010
Location: Up in the alps - motorcycle heaven
Impossible to resist saying 'Gotcha', at the appropriate moment.
  Reply With Quote
Old 17th August 2013, 01:11 AM   #4
tvrgeek is offline tvrgeek  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Md
"Lowered fidelity of class D". Hmmm A year ago I would have agreed. DIfferent for sure. Having only heard the Rotel, I kind of liken it to the difference of a digital vs film picture. Once digital got over 16 Meg, they surpassed ASA 200 35mm film in resolution. But they are different. Is it the sensitivity to IR? Different color rendering? Don't know but different. The Rotel was quiet. Seemed clean and detailed. It did not make me feel comfortable. Maybe I expected the older soft Rotel sound from the 9's and 10's.

Why not use the tubes as switches and actually build a class D amp? An RF output tube should be fast enough. LC output coupling and filter in one. You may need an RF bandwidth tube driver stage to get the voltage swing.
  Reply With Quote
Old 17th August 2013, 01:29 AM   #5
diyAudio Member
 
Join Date: Aug 2013
Location: Melbourne
ya, i guess it shouldnt be too hard to replace the power transistors with rf tubes. i was just trying to think of the simplest way to do it. would be a gigle to see XD
  Reply With Quote
Old 17th August 2013, 10:52 PM   #6
tvrgeek is offline tvrgeek  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Md
Look at PWM microwave transmitters from the early pre-silicon days.
  Reply With Quote
Old 17th August 2013, 10:56 PM   #7
Pano is online now Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Kona, Hawaii
Blog Entries: 4
I always wanted a wire recorder to do field recording with. Why? Just for the retro silliness of it.

Now I have one and am spending more time making the damn thing work right than doing any recording.
  Reply With Quote
Old 17th August 2013, 11:03 PM   #8
Jsixis is offline Jsixis  United States
diyAudio Member
 
Join Date: Feb 2011
Location: Columbus Ohio
I always wanted a Reel to Reel, finally 3 years ago the timing was perfect and I have a Teac 3340s reel to reel.
Bought a dozen tapes off ebay. Made some great recordings, then promptly switched to digital.
Now the R2R just sits there.
  Reply With Quote
Old 17th August 2013, 11:11 PM   #9
nezbleu is offline nezbleu  Canada
diyAudio Member
 
nezbleu's Avatar
 
Join Date: Dec 2009
Location: Halifax, Nova Scotia, Canada
It's probably been done, but I always wanted to build a power amp that was roughly like a Quad 404, but the low-current part made from an output-transformerless tube amp, and MOSFET current dumpers. No reason, just always thought it would be cool. (Not "temperature cool" but just cool.)
  Reply With Quote
Old 18th August 2013, 12:26 PM   #10
tvrgeek is offline tvrgeek  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Md
Quote:
Originally Posted by Jsixis View Post
I always wanted a Reel to Reel, finally 3 years ago the timing was perfect and I have a Teac 3340s reel to reel.
Bought a dozen tapes off ebay. Made some great recordings, then promptly switched to digital.
Now the R2R just sits there.
Did you grab one of their Dolby units or a DBX to use with it? I have fond memories of mine. Of course, I went digital as soon as the Sony Beta worked as a PCM audio deck.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wanted: Wanted to buy california Audio Lab Tempest II Special Edition Power Supply Un ebxb Swap Meet 0 22nd February 2012 03:51 PM
Wanted Mordaunt-short MSW20 Schematic Wanted simon dart Subwoofers 0 22nd May 2009 09:19 AM
CDM3 wanted , most wanted! Gasho Swap Meet 1 31st March 2006 06:48 AM
Just wanted to say... anelar Solid State 0 11th May 2002 12:33 PM


New To Site? Need Help?

All times are GMT. The time now is 06:50 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2