Tube amp for newbye - 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 13th March 2008, 03:34 PM   #1
diyAudio Member
 
Join Date: Mar 2008
Default Tube amp for newbye

Hello,
I'm frarobertooo and it's the first time I post here and like quite every newbye I won't be probably clear in my request Please go easy on me!
Well, I have decided to build an amp for my Fender Rhodes with a stereo output of 50 watt or more. I have already some knowledge on electronic but this will be my first real diy project and sure I'd like to keep it simple
So I was looking for an easy, clear, not necessarily cheap schematic with easy to find components. One of my problem is that I really don't know which tubes are regularly manufactured and which are hard to buy.
Could you please help me, also with a simple good link?
Thank you,
frarobertooo
  Reply With Quote
Old 14th March 2008, 12:01 AM   #2
alexg is offline alexg  Philippines
diyAudio Member
 
alexg's Avatar
 
Join Date: Jan 2005
Location: Philippines
Browse the internet tube stores like tubedepot.com and tubestore.com, anything that they sell will be mostly in current production.

A 50 watt per channel project based on vacuum tubes/valves will not be very simple.

If you can live with an 8 watt per channel output, search for Mikael Abdellah's SE KT88 schematic on this forum, that project is quite simple to execute. If you decide to build this amp, search for porkchop's post on his build of this amp, it is very informative and will help you with the project.

This project was my first vacuum tube/valve project.
  Reply With Quote
Old 14th March 2008, 12:13 AM   #3
diyAudio Member
 
Join Date: Jul 2005
Location: Montréal QC
If you're prepared to invest a little, look at the Boozhound amp on www.boozhoundlabs.com

I've dropped >$350 on quality iron, NOS valves....so you can make a REALLY good sounding amp out of it, esp with NOS 12/6SN7
  Reply With Quote
Old 15th March 2008, 12:12 PM   #4
diyAudio Member
 
Join Date: Mar 2008
Thank you for the answers!
In the last month I have surfed the web but I could'nt find a 50W DIY tube amp kit and my post was much like a last hope query
Now I'm pondering to build a solid state final amp (gaincone ones? Lynx v3.0?) with a tube preamp... is this total weird? I mean, in this way I should have some of the tube audio characteristics with the solid state power.
  Reply With Quote
Old 15th March 2008, 11:11 PM   #5
diyAudio Member
 
Join Date: Jul 2005
Location: Montréal QC
How efficient are your speakers?

90dB/w....

90dB in a small room is freaking noisy. that takes 1W
  Reply With Quote
Old 15th March 2008, 11:19 PM   #6
Jeb-D. is offline Jeb-D.  United States
diyAudio Member
 
Jeb-D.'s Avatar
 
Join Date: Nov 2005
Location: SoCal
Quote:
Now I'm pondering to build a solid state final amp (gaincone ones? Lynx v3.0?) with a tube preamp... is this total weird? I mean, in this way I should have some of the tube audio characteristics with the solid state power.
That's not totally weird. Plenty of people have gone that route.
  Reply With Quote
Old 16th March 2008, 12:17 AM   #7
john65b is offline john65b  United States
diyAudio Member
 
john65b's Avatar
 
Join Date: Jan 2005
Location: Chicago
First build?

Chipamp.com gainclone. Then a 12B4 Tube preamp, or a JFET BOZ.
__________________
All right, but apart from the sanitation, medicine, education, wine, public order, irrigation, roads, the fresh water system and public health, what have the Romans ever done for us? Life of Brian
  Reply With Quote
Old 16th March 2008, 01:30 PM   #8
diyAudio Member
 
basstard's Avatar
 
Join Date: Jan 2008
I know **** about these keyboards [or whatever they are ] but do they have two channels for real?

I saw keyboards connected to guitar/bass amps which are mono,,,
  Reply With Quote
Old 18th March 2008, 04:30 PM   #9
diyAudio Member
 
Join Date: Mar 2008
Thank you basstard (nice nick
Yes my Rhodes is mono... I'm a little bit confused but I'm slowly undestand what I need.

In the meantime I have found Schematics Heaven and throroughly surfed it. As usuall I have another lil' question:
In quite every schematic it isn't specified the transformer data: how can I determinate which is the right one? In example: In the Marshall 1987 Lead 50W there are 3 transformer but I have no clue of their technical data.

I know I know, I'm the newbye epitome but I really don't like to post several times in a forum with lots of questions...
  Reply With Quote
Old 18th March 2008, 06:53 PM   #10
diyAudio Member
 
basstard's Avatar
 
Join Date: Jan 2008
ok, so you can go mono and get no prob mate,,,
I don't know the frequencies these things generate but I'd say you'd better go for a bass amp. A bass can generate from say 20-30Hz up to 8-10KHz so if you get a decent cab that covers the whole range you can get covered almost all of the frequencies you need.
A guitar can generate frequencies from say 160-200Hz up to 10kHz so if you need lower freqs you're not sure to get them with a guitar amp,,,
Or else you could use a guitar amp and modify it to get more lows,,, depends on what you like best really.

In the specific schematic you posted I can only see the 6.3v indicated [that's for the filaments]. What I normally do, is see what voltage is indicated on the schematic just after the transformer and then I buy an adequate transformer that can keep also with the current drawn by the circuit.
This is what I do, maybe there's a more scientific way I don't know of.

If you need to be pointed to some transformer seller/manufacturer in italy just tell me.
  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
need diy tube preamp (line-stage) recommendation and general tube advice Musiclover4 Tubes / Valves 16 18th May 2013 03:19 PM
FS tube tuner, Active filter kit, tube amp, amp3 Josephjcole Swap Meet 9 20th July 2007 04:05 PM
SS or tube voltage amplifying stages in an amp with tube output? ray_moth Tubes / Valves 14 4th July 2007 03:09 AM
Octal tube as headphone amp output tube yagoolar Headphone Systems 6 25th November 2006 09:11 PM
tube driving the same tube - whats the collective word? zobsky Tubes / Valves 3 13th June 2005 06:47 AM


New To Site? Need Help?

All times are GMT. The time now is 05:53 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