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 15th January 2011, 04:24 PM   #1
waltube is offline waltube  Italy
diyAudio Member
 
waltube's Avatar
 
Join Date: Feb 2005
Location: roma
Default Shuguang 300BC

Hello!

I am using the 300B JJ and 300BC Shuguang.
One quartett of 300BC with one year of work at 410 Vdc and 50 mA of current ( fixed bias) got three three spot problems ( intermittent high anode current on different tubes).
With same circuit the JJ seems to be run good.
The sound of 300BC is very interesting, maybe better than JJ.
Someone found problems with 300BC?

Thanks and ciao

Walter
  Reply With Quote
Old 15th January 2011, 04:38 PM   #2
diyAudio Member
 
Join Date: Apr 2007
Quote:
Originally Posted by waltube View Post
Hello!

I am using the 300B JJ and 300BC Shuguang.
One quartett of 300BC with one year of work at 410 Vdc and 50 mA of current ( fixed bias) got three three spot problems ( intermittent high anode current on different tubes).
With same circuit the JJ seems to be run good.
The sound of 300BC is very interesting, maybe better than JJ.
Someone found problems with 300BC?

Thanks and ciao

Walter
Buona sera.

I use Shuguang 300B tubes in my SET amp and they sound good when B+ is at around 370V and bias is at 70mA.

There have been some output tube reviews but they should be taken with a grain of salt. 300B listening tests You don't have to change this output tube to sound different. Just by changing B+ voltage and bias current can alter it so I'm not sure if tube rolling is worth it as long as it holds up.

Ciao.

Last edited by Evenharmonics; 15th January 2011 at 04:40 PM.
  Reply With Quote
Old 4th March 2011, 07:39 PM   #3
diyAudio Member
 
Join Date: Dec 2001
Location: Eindhoven
Quote:
Originally Posted by waltube View Post
Hello!

I am using the 300B JJ and 300BC Shuguang.
One quartett of 300BC with one year of work at 410 Vdc and 50 mA of current ( fixed bias) got three three spot problems ( intermittent high anode current on different tubes).
With same circuit the JJ seems to be run good.
The sound of 300BC is very interesting, maybe better than JJ.
Someone found problems with 300BC?

Thanks and ciao

Walter
Walter,

When are you going to pay my invoice number 10350 ? This is from september last year and you are not all responding to my E-mails

Guido
__________________
Guido Tent
www.Tentlabs.com
  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
6L6GC -Which Shuguang can take the Heat? Rod Coleman Tubes / Valves 39 10th February 2013 04:44 PM
Shuguang 805 - Advice FullRangeMan Tubes / Valves 5 23rd December 2010 08:04 PM
Shuguang Treasure 300B-Z Dave C2 Tubes / Valves 3 30th November 2010 05:17 PM
Shuguang 807s? AD5GB Tubes / Valves 14 1st November 2006 07:06 AM
一台300bc胆机,大家给点意见,谢谢 7758258 Tubes / Valves 18 5th September 2006 01:39 PM


New To Site? Need Help?

All times are GMT. The time now is 06:38 PM.


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