proposed 833 design - 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 25th March 2004, 12:42 PM   #1
diyAudio Member
 
Join Date: Nov 2002
Location: North Herts, UK
Default proposed 833 design

Needing something to pull me out of the 'depressed' state that work has left me in over the past year - it had got so bad that I have now resigned and am just working out my notice period, a whole six months but a least that is an end to it then. Anyway needing something to lift my spirits and being inspired by the 833 pictures of Reinouts amp, I have bought some 833s (from Halfin - they were great to deal with).

Now I just need a design... well I have knocked one up using PL802 in pp as a driver (see diagram). but I am not sure what operating point for the 8333 to use. I like the look of Va=750V, Ia=350mA and Vg=+25V. It looks like I can get a very linear swing for +/- 25Volts input with maximum input of +/-50volts before clipping the output. This with a 3K OPT. However I am wondering what op points other people have used or would suggest???

I will make the high voltage supply bipolar to half the B+ to earth risk at the cost of doubling the number of caps and chokes in the power supply - a worthwhile trade off for me. I have most of the components for a +/- 400V to +/- 800V supply at 400mA so that will do one channel! Just one to go...

I am lucky that I have two surplus switch-mode psu of 12V at 10A that I can use for filament supplies. I'll feed the psu through CLCLC rf filters to reduce the switching noise even further and connect that to the filaments.

Any suggestions or thoughts are most welcome

ciao

James
Attached Images
File Type: gif pl802 pp it 833a se.gif (10.8 KB, 326 views)
  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
Proposed screen-drive amp design... comments, please? GordonW Tubes / Valves 37 15th April 2012 12:31 PM
Opinions on proposed design? leadbelly Multi-Way 13 18th September 2006 09:16 AM
Proposed Coiled TQWT Design RaphTube Multi-Way 13 30th September 2005 07:39 AM
Need comments on a proposed sub design cdwitmer Multi-Way 16 23rd August 2004 09:56 AM


New To Site? Need Help?

All times are GMT. The time now is 12:29 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