Schematic to a friend - 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 12th June 2012, 08:57 PM   #1
diyAudio Member
 
Join Date: Jan 2005
Location: Denmark
Question Schematic to a friend

Hello Friends

I've made a schematic for a friend, and now I want the specialists to comment on the schematic before we start the soldering iron.

Thank you in advance

You must not look at the pin numbers on the schematic. They do not fit.

Regards

Benny

Denmark
Attached Files
File Type: pdf 6BG6 SE.pdf (15.0 KB, 127 views)

Last edited by Hojvaelde; 13th June 2012 at 02:39 AM. Reason: Oversight.
  Reply With Quote
Old 12th June 2012, 09:16 PM   #2
diyAudio Member
 
Chris Hornbeck's Avatar
 
Join Date: May 2011
Location: Little Rock
Be sure to bypass V5's g2 (screen) to ground or cathode. Looks good. Pentode output stages can often benefit from a Zobel across the speaker output terminals - cheap 'n cheerful.

All good fortune,
Chris
  Reply With Quote
Old 13th June 2012, 09:13 AM   #3
diyAudio Member
 
Join Date: Aug 2008
Just make sure that G2 current is always enough to keep the 39V Zener in the linear range. Maybe you need a lower wattage Zener.
  Reply With Quote
Old 13th June 2012, 08:58 PM   #4
diyAudio Member
 
Globulator's Avatar
 
Join Date: Aug 2004
Location: Cambridge, England.
Note that these are my opinions and other people may disagree:

I'd do the NFB differently - run a 47uF capacitor from the 6BG6 anode through a 47K resistor into the top of R2, delete R3 and C1.

You may need to tweak values slightly to taste and gain.
I'm assuming this is a power amp - if integrated I'd add another triode at the front end like an ECC88.

Use a follower for D3 too if possible.
No idea about the PSU - didn't look at that.
  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
friend needs help goodsguy Chip Amps 1 16th September 2010 07:27 PM
Hello. Looking for a friend. acratus Introductions 1 14th October 2008 10:48 PM
Need help finding a phono schematic for a conversion for a friend Gunny Instruments and Amps 2 8th January 2007 03:59 AM
A North European friend asked me to show you this schematic. destroyer X Solid State 11 8th October 2004 07:12 AM


New To Site? Need Help?

All times are GMT. The time now is 08:55 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