Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki 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

Using 12 EL519 for T8
Using 12 EL519 for T8
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 5th February 2004, 10:42 AM   #1
ackcheng is offline ackcheng  Hong Kong
diyAudio Member
 
Join Date: Dec 2003
Location: hong Kong
Send a message via ICQ to ackcheng
Default Using 12 EL519 for T8

Dear Sir,

I am just thinking if I use 12 EL519 for a Transcedent T8 instaead of the original 8 inorder to increase the power. Should I change the spec for the fuse? I am going to use two 300VA transformers in parallel to deliver 135V-0-135V. (The origianl deisgn was 120-0-120 but I can only find the 135-0-135 availble. I will change the bias resistors)

Arthur
  Reply With Quote
Old 7th February 2004, 01:09 AM   #2
fdegrove is offline fdegrove  Europe
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Hi,

Quote:
I am going to use two 300VA transformers in parallel to deliver 135V-0-135V.
You'll end up about 15VDC too high so I suggest you put a dropping resistor between C18- C20 and C19- C21 respectively.

Quote:
Should I change the spec for the fuse?
Is that a 500mA Slow Blow fuse?
If so, go for the next one up if you see the fuses blow for no apparent reason.

Cheers,
__________________
Frank
  Reply With Quote
Old 7th February 2004, 11:18 PM   #3
icebear is offline icebear  Norway
diyAudio Member
 
Join Date: Dec 2003
Location: Aalesund
Default Va

Doesn't VA stand for Voltage Ampere, which means Watts?

Has not really anything to do with the actual voltage you get from the transformer.

Am I rigth?
  Reply With Quote
Old 7th February 2004, 11:40 PM   #4
fdegrove is offline fdegrove  Europe
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Hi,

Quote:
Doesn't VA stand for Voltage Ampere, which means Watts?
Yes, only that's not the problem.

The point is that the original xformer is 120V-0-120V, not 135-0-135V.

Cheers,
__________________
Frank
  Reply With Quote

Reply


Using 12 EL519 for T8Hide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
5x EL519 ErikdeBest Swap Meet 1 28th October 2008 01:36 PM
Wtb : El509, El519, 6lf6 ANALOG GUY Swap Meet 0 13th July 2006 04:13 PM
EL509 vs EL519 resident Tubes / Valves 3 15th November 2004 02:01 PM
EL519/KT90 The old debate Alastair E Tubes / Valves 8 8th March 2004 08:46 AM
schematics for a EL509/ EL519 PP amp needed NotInTheMafia Tubes / Valves 15 15th December 2002 08:28 PM


New To Site? Need Help?

All times are GMT. The time now is 07:47 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki