World-Designs-Forum  

Go Back   World-Designs-Forum > DIY Projects > Amplifiers
Register FAQ Members List Calendar Gallery Today's Posts Mark Forums Read

Amplifiers Your DIY amplifier designs

Reply
 
Thread Tools Display Modes
  #31  
Old 23rd January 2009, 08:44 PM
pre65's Avatar
pre65 pre65 is offline
Senior Member
 
Join Date: Jan 2006
Location: Ashen- Essex/Suffolk bord
Posts: 4,538
Default Re: 845 Project

Quote:
Originally Posted by Ali Tait View Post
Almost anything is easier to drive than 845! (and 300b)
The 2-1 step up interstage transformer is the key ! (for 845 anyway)

And the C3g makes a very good job driving 300b (and 2A3, PT15, KT66 etc)
__________________
Philip.

Everything in this post is my honest opinion based on what i thought I knew at that very moment in time.
Reply With Quote
  #32  
Old 23rd January 2009, 09:28 PM
Ali Tait's Avatar
Ali Tait Ali Tait is offline
Senior Member
 
Join Date: Dec 2005
Location: Leeds
Posts: 937
Default Re: 845 Project

Hope you're bringing it to the next Owston Phil,hows the hum issue now?
Reply With Quote
  #33  
Old 23rd January 2009, 09:59 PM
pre65's Avatar
pre65 pre65 is offline
Senior Member
 
Join Date: Jan 2006
Location: Ashen- Essex/Suffolk bord
Posts: 4,538
Default Re: 845 Project

Quote:
Originally Posted by Ali Tait View Post
Hope you're bringing it to the next Owston Phil,hows the hum issue now?
The hum problem was mainly with the 300b part, which is the main reason why i removed the fixed bias bits, and converted to cathode bias.

Been playing it with KLS3 today and its good !

Depends when the next fest is as it might be GM70 by then !!
__________________
Philip.

Everything in this post is my honest opinion based on what i thought I knew at that very moment in time.
Reply With Quote
  #34  
Old 23rd January 2009, 10:11 PM
Ali Tait's Avatar
Ali Tait Ali Tait is offline
Senior Member
 
Join Date: Dec 2005
Location: Leeds
Posts: 937
Default Re: 845 Project

Have to be copper ones!
Reply With Quote
  #35  
Old 23rd January 2009, 10:29 PM
pre65's Avatar
pre65 pre65 is offline
Senior Member
 
Join Date: Jan 2006
Location: Ashen- Essex/Suffolk bord
Posts: 4,538
Default Re: 845 Project

No, these will be the REAL McCoy !!

Bedford ones !! (they are special-don't you know ?)
__________________
Philip.

Everything in this post is my honest opinion based on what i thought I knew at that very moment in time.
Reply With Quote
Reply


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
Forum Jump


All times are GMT +1. The time now is 02:40 AM.


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright World Designs