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 7th July 2005, 04:43 PM   #1
diyAudio Member
 
Join Date: Mar 2005
Location: Kleve - NRW
Exclamation 833a Amp 75W SE

Hello,
I would design gladly a 833a amp. Perhaps does someone have thereby experience or even a good connection diagram? I would use 845 a triode gladly as driver
( however I would do gladly
without the two transducers in the preliminary stage).
The whole is to become SE amp.
The 833 anode voltage is to be operated and with -60V bias with a Raa of ~20k. it is around the 75 -100W to carry out in such a way with 3000V.


MfG Dominic from Germany
  Reply With Quote
Old 7th July 2005, 05:36 PM   #2
Giaime is offline Giaime  Italy
diyAudio Member
 
Giaime's Avatar
 
Join Date: Oct 2004
Send a message via MSN to Giaime
Default Re: 833a Amp 75W SE

Quote:
Originally posted by dominic_tollens
I would use 845 a triode gladly as driver


Quote:
Originally posted by dominic_tollens
it is around the 75 -100W to carry out in such a way with 3000V.


However those crazy things turn out to be great most of the times! (I wonder about the power consumption of that amp)
  Reply With Quote
Old 7th July 2005, 06:17 PM   #3
diyAudio Member
 
Miles Prower's Avatar
 
Join Date: May 2005
Location: USA
Blog Entries: 6
Why use something as whimpy as a 833A when you could build One of These
__________________
There are no foxes in atheistholes
www.dolphin-hsl.com
  Reply With Quote
Old 8th July 2005, 11:37 AM   #4
diyAudio Moderator Emeritus
 
Bas Horneman's Avatar
 
Join Date: Apr 2002
Location: The Netherlands
Blog Entries: 18
Check out this tread with Reinout's stunning 833 amp!

Where are the 833 amps?
  Reply With Quote
Old 8th July 2005, 07:38 PM   #5
diyAudio Member
 
Join Date: Mar 2005
Location: Kleve - NRW
I will probably build this Amp. However with another driver, I think however I the Amp also times in the orginale will try out. Later then 845 drivers after Unison a S8, thus I have good experiences of sounded made ago.
It carries for instance 13W out (With small change which that heat the ECC concerns. )



Unison S8 "Driver"

833a 75W Schematic

Which hold you from orginal the circuit and/or from the idea the S8 as drivers to use in such a way.

...
Gladly I would try also times the Wavac out 833 circuit. There does someone know which more drueber?
...

MfG Dominic
  Reply With Quote
Old 14th December 2006, 02:12 AM   #6
diyAudio Member
 
Join Date: Oct 2004
I have some schematic's from Lancroft Audio, but they are not so perfect like i would want. I was thinking, building a very good set amp with a 300B and in place of a OPT, using an interstage trafo to drive the 833A, I was thinking of using the 300BXLS (powered at 472V and 120mA), drived by a -stage of D3A penthode and 27 triode (Attilla from Triode Dick) and in place of a beefy OPT, using of an interstage transformer. And i have an electron tubes book T1 from Philips, 1985 and would the TB4/1250 not been better than the 833A? The TB4/1250 looks better than the 833A, maybe little more stable?
I think that if you think, an 833A from Wavac, rated at 150w classA i think that it is most A2 driven, so sounds not so good.
I have a schematic of the HE805 from Wavac, and the schematic diagram don't look spectacular high-end, more like an overkilled dissapointment (in technical therms if you study the schematic diagram)...
  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
Amplifier using a 833A Tekko Tubes / Valves 17 15th September 2009 01:02 AM
833a SE Peak A.F. Grid Voltage dominic_tollens Tubes / Valves 4 16th June 2008 10:08 AM
FS 833a tubes & caps woody Swap Meet 2 18th September 2005 01:52 PM
tube 833a wasibi Tubes / Valves 0 22nd April 2005 09:00 AM
833a plate resistance ? woody Tubes / Valves 8 5th August 2004 03:06 PM


New To Site? Need Help?

All times are GMT. The time now is 10:50 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