World-Designs-Forum  

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

DIY Pictures Gallery of DIY project pictures

Reply
 
Thread Tools Display Modes
  #1  
Old 5th April 2015, 04:14 PM
tasos25 tasos25 is offline
Junior Member
 
Join Date: Apr 2015
Location: Greece
Posts: 2
Default opinion for schematics

hello
New to forum and hi end I want to build a tube amplifier and after much searching I found this projects
http://www.audio-talk.co.uk/fiultra/...trafi-crct.jpg
I would like if you kindly take a look and tell me your opinion what do you think about batteries for negative grid bias and another plan is this

http://www.audiodesignguide.com/SE300B/index.html
more than two is preferable to construct
Thanks for replying
Reply With Quote
  #2  
Old 5th April 2015, 04:22 PM
pre65's Avatar
pre65 pre65 is offline
Senior Member
 
Join Date: Jan 2006
Location: Ashen- Essex/Suffolk bord
Posts: 4,538
Default Re: opinion for schematics

Hi

What speakers are you using ? And how many watts do they need for realistic sound levels ?

300b can sound really good, but there are very many ways to use them.
__________________
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
  #3  
Old 5th April 2015, 06:13 PM
tasos25 tasos25 is offline
Junior Member
 
Join Date: Apr 2015
Location: Greece
Posts: 2
Default Re: opinion for schematics

hi
I want to use drivers fostex 206 or 208 with tweeter
As for watt i believe that 7-8 is quite Any suggestions me something else
Thanks for the quick reply
Reply With Quote
  #4  
Old 5th April 2015, 07:41 PM
pre65's Avatar
pre65 pre65 is offline
Senior Member
 
Join Date: Jan 2006
Location: Ashen- Essex/Suffolk bord
Posts: 4,538
Default Re: opinion for schematics

I have made many valve amps since I started in 2006.

300b can be very good, but you need to get the right quality of parts to make it sound really good. But I suppose that could be true for any valve you use.

Personally, I'd suggest you have a read of this article.I found the GM70 (and GK-71 as a triode) to be "better" than any 300b amp I built.

http://www.diyparadise.com/nikcgm70.html
__________________
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
  #5  
Old 16th April 2015, 09:16 PM
pre65's Avatar
pre65 pre65 is offline
Senior Member
 
Join Date: Jan 2006
Location: Ashen- Essex/Suffolk bord
Posts: 4,538
Default Re: opinion for schematics

I had a friend come round to compare his GM70 amp with my GK-71 amp.

There were differences in the sound quality (mine was a bit "warmer" ), but we both agreed they were better than the average 300b SET amp.

Just our opinions of course.
__________________
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 10:33 AM.


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