Show us you COMPACT tube amps ! - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 19th September 2010, 12:38 AM   #21
CLS is offline CLS  Taiwan
diyAudio Member
 
Join Date: Jun 2005
Location: Taiwan
Totally unimaginable!

------------

Say, how about DHT? Any compact DHT amp?
  Reply With Quote
Old 19th September 2010, 02:27 AM   #22
diyAudio Member
 
indianajo's Avatar
 
Join Date: Jan 2010
Location: Jeffersonville, Indiana USA
Default compact tube amps?

I thought I would see pictures of nuvistor amps, but I apparently am the only person with a bin full of 7895's pulled out of the trash in original boxes. I've never seen sockets for sale for them, just one lonely socket on the Triplett tube tester. Your 9 pin tubes are tubas compared to the piccolo trumpets of nuvistors.
You remember, the US was putting tubes in anti-aircraft shells in 1945. What they were was a big secret, but I would nominate the nuvistor.
__________________
Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,1.3K, SP2-XT's, T-300 HF Proj's, Steinway console, Herald RA88a mixer, Wurlitzer 4500, 4300

Last edited by indianajo; 19th September 2010 at 02:40 AM.
  Reply With Quote
Old 19th September 2010, 02:32 AM   #23
diyAudio Member
 
aardvarkash10's Avatar
 
Join Date: Mar 2007
Location: Auckland, NZ
i guess compact is a relative term. We always laughed over here in New Zealand when we read about GM or Fords' "compact" models - you know, the ones that only seated 6 people and got 12 mpg...
__________________
"Folks, you can't prove truthiness with information. You prove truthiness with more truthiness. In a process known as truthinessiness." - Stephen Colbert, The Colbert Report
  Reply With Quote
Old 19th September 2010, 02:41 AM   #24
diyAudio Member
 
indianajo's Avatar
 
Join Date: Jan 2010
Location: Jeffersonville, Indiana USA
My second best friend's 66 falcon got 22 mpg, as long as only the two of us rode in it.
__________________
Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,1.3K, SP2-XT's, T-300 HF Proj's, Steinway console, Herald RA88a mixer, Wurlitzer 4500, 4300
  Reply With Quote
Old 19th September 2010, 02:47 AM   #25
diyAudio Member
 
tubelab.com's Avatar
 
Join Date: Jul 2005
Location: West Virginia panhandle
Quote:
Say, how about DHT? Any compact DHT amp?
While not terribly compact, it is smaller than at least one of the amps shown here. It is about 12 inches by 11 inches by 7 inches tall and weighs about 25 pounds. 23 of them are iron and copper! The OPT's are Electra - Print. It is the smallest amp that I currently have and the best sounding.

It makes 2 WPC with 45's or 483's and 6 WPC with 300B's
Attached Images
File Type: jpg Lexan_3_A.jpg (289.1 KB, 639 views)
File Type: jpg Lexan_2_A.jpg (249.2 KB, 615 views)
File Type: jpg TubelabSE_NX-483_640.jpg (337.9 KB, 597 views)
__________________
Too much power is almost enough! Turn it up till it explodes - then back up just a little.
  Reply With Quote
Old 19th September 2010, 02:52 AM   #26
diyAudio Member
 
Ty_Bower's Avatar
 
Join Date: Mar 2007
Location: Newark, DE
Quote:
Originally Posted by indianajo View Post
I thought I would see pictures of nuvistor amps
Everybody knows there hasn't been a nuvistor amp worth talking about since the "Big Bang" single ended triode amplifier.
  Reply With Quote
Old 19th September 2010, 04:45 AM   #27
diyAudio Member
 
wrenchone's Avatar
 
Join Date: Feb 2004
Location: Silicon Valley
My "No Light District" 6CW5 P-P amp will be pretty compact, though not as compact as I wanted. I went to a larger case to make life easier for myself (I have another small amp in the works that's crowded inside and a right bastard to debug), though it's still reasonably small. Output iron is inside the case, as it's old Baldwin stuff that's fairly ugly. There's another SMPS, too, but you knew that, didn't you... Pics to follow after more work has been done.

Last edited by wrenchone; 19th September 2010 at 04:47 AM. Reason: sp
  Reply With Quote
Old 19th September 2010, 01:36 PM   #28
Arnulf is offline Arnulf  Europe
diyAudio Member
 
Join Date: Feb 2009
Quote:
Originally Posted by wrenchone View Post
The SMPS schematics wouldn't do much good if you don't have access to the materials and the facilities to make the transformer.
You mean like leftover transformers from ATX PSUs and such ? What I'm curious about is how you took care of startup, regulation etc.
__________________
mod verb, transitive /mod/ to state that one is utterly clueless about the operation of device to be "modded" and into "fixing" things that are not broken; "My new amplifier sounds great so I want to mod it."
  Reply With Quote
Old 19th September 2010, 01:42 PM   #29
djn is offline djn  United States
diyAudio Member
 
djn's Avatar
 
Join Date: Oct 2004
Location: Waterford Michigan
Quote:
Originally Posted by Michael Koster View Post
Spudnik One

A little over one watt per channel using 6S45P with series anti-triode; parafeed output using AMVECO 25VA potted toroids. Powered from a 12V wall wart using internal RECOM DC-DC converters.

Cheers,

Michael
Hi Michael, can you tell us more about this little thing. I really like it. Pix, scheems....whatever you got.
  Reply With Quote
Old 19th September 2010, 07:19 PM   #30
diyAudio Member
 
wrenchone's Avatar
 
Join Date: Feb 2004
Location: Silicon Valley
Arnulf, the transformers aren't recycled from PC power supply rubbish, but are designed and built from scratch. The basic design uses the ST L6565 quasi-resonant flyback controller, with some changes for each design situation. The chip has provision for startup. You can check out the data sheets and application note on line if you're curious. It'll also answer some of your questions about regulation.
  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
What can measurements show/not show? jkeny Everything Else 137 9th August 2010 12:31 PM
Help finding a tube tester for Stereo tube amps. Fasterdamnit Tubes / Valves 8 19th July 2010 01:43 AM
For Sale: Tube Amps, Class-A Amps, BG Ribbons, Chassis and Other Goodies! opc Swap Meet 23 2nd November 2009 05:04 PM
Tube amps.......AGAIN Brap Tubes / Valves 7 22nd January 2004 04:07 PM
Show of hands for the Montreal Sound and Image Show (Le Festival Son & Image) alvaius Everything Else 2 28th January 2003 05:48 PM


New To Site? Need Help?

All times are GMT. The time now is 11:22 AM.


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