Music Angel Modification - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 25th January 2008, 12:07 PM   #1
diyAudio Member
Join Date: Jan 2008
Default Music Angel Modification

I've been following a few threads about modifying the Music Angel XDSE KT88 and it appears that a few relatively basic modifications to the triode/pentode switch and the input board can give worthwhile improvements.

The only problem is I'm incompetent (or perhaps incontinent?) and need to pay someone to do this for me....Changing the valves I can handle, but re-biasing and changing resistors/capacitors is a step too far.

I live in Stamford (N Cambs/S.Lincs). Any suggestions would be gratefully received!

  Reply With Quote
Old 26th January 2008, 06:36 AM   #2
Svein_B is offline Svein_B  Norway
diyAudio Member
Join Date: Oct 2005
There are a few existing threads here discussing some modifications and tweaks of the Music Angel El34 and KT88 amplifiers. There are however no conclusive circuit modifications that are guaranteed to produce a better amplifier - to everybody's taste.

Report from a number of owners are that this XDSE800 version with KT88 is sounding quite good as-is, but it can benefit from some tube rolling. The supplied small tubes seem to be old, but worn. Changing the 12AT7 seem to have most effect.
Replace the 12AT7 with some good NOS tubes, for example Siemens ecc801s/e81cc, or maybe some Mullard?
The Shuguang KT88 tubes supplied are quite good.

One electrical modification that is recommended, is to make sure that preotective earth from the power input is connected to the chassis. This is often missing on these amps.

  Reply With Quote
Old 28th January 2008, 02:13 PM   #3
diyAudio Member
Join Date: Jan 2008
Hi Svein,

Many thanks for your reply, very helpful. Looks like tube rolling on the input side is the way to go. I'll also check the chassis earth.

Kindest regards

  Reply With Quote


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
music angel 845 SET PeterParsons Tubes / Valves 23 31st August 2015 02:58 PM
Music angel XD-SE EL34 Kippy Tubes / Valves 18 12th January 2011 08:36 PM
Music Angel - Help wanted Nardis Tubes / Valves 6 27th March 2008 11:07 PM
Music Angel franckM Tubes / Valves 11 10th June 2007 11:24 PM

New To Site? Need Help?

All times are GMT. The time now is 07:52 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2