12AU7 vs 12BH7 vs 6CG7 - Page 5 - 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 16th November 2011, 09:40 AM   #41
diyAudio Member
 
Join Date: Feb 2010
Location: Helsinki
These discussions are always somewhat of word games, but here's my 2 euro cents.

A system can be lifeless without adding anything - it can be lifeless by not amplifying something in the music, losing it along the way.

A well done lively record absolutely should sound lively, but I find that many systems don't project this through. I would characterise these systems as 'lifeless'. So the mark of a truely magnificent system would be that dry records always sound dry, and lively records sound rich and lively. My opinion is that a good system makes all kinds of music and recordings sound more of what their own character is, becoming truely transparent.
  Reply With Quote
Old 16th November 2011, 10:19 PM   #42
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Hi,

Quote:
Originally Posted by Original Burnedfingers View Post
I guess I'm still learning but I always thought the makings of a good audio system was the ability to amplify the signal without adding something to it that isn't there. You talk about the lifeless of a 6SN7 for example. I'm confused... so a tube is supposed to alter and inject something into the mix that just isn't there? I had always thought that a recording of a performace should sound just like the performace did. Boy was I wrong

So, my Aikido (6sn7/6sn7) and my Frank's 6sn7/5692 line stages are incorrect because they are more true to life sounding? My Quicksilvers with 12BH7 should have the 12BH7's pulled in favor of the 12Au7?

Oh, I almost forgot about the 6fq7/6cg7. The 6cg7 is better because its got a magical screen in it but yet when I have tried a one lb coffee can of assorted tube I can tell no difference in my 6FQ7/5687 Aikido. Still confused

Granted what I have is minimal compared to some of the systems and equipment that some here own but for accuracy against the real thing I'll go with what I have.
There is a large margin between what the industry considers as equivalent and to what actually is electrically.

Without even considering so called equivalents from data books etc, there's enough difference from one tube to another to make you wonder about the building blocks you're using in your search for the holy graal.

Just like lookng for DNA matches, sometimes it happens and you find yourself in the presence of something that actually matches your master tape.

In real life it rarely ever happens. Just as rarely as anyone winning the lottery and then some.

Why is this, you may ask?

The answer is quite simple: Money talks.

Cheers,
__________________
Frank
  Reply With Quote
Old 17th November 2011, 04:05 PM   #43
diyAudio Member
 
Join Date: Nov 2011
Location: Tulbagh Western Cape RSA
Interesting that Hans Beijner first used 12AX7 in the preamp stage and 12AU7 in the driver stage and 6C33C in the output stage in the 1st schematic of his OTL amp and subsequently published his latest OTL schematic with 12BH7 replacing the 12AU7 in the driver stage 12AX7 and 6C33C being retained. There will be a reason for this. I have not gotten round to ask him perhaps it works better in this topolgy, There is no guarantee that the one is better than the other in all configurations. I will surely ask him why he changed from 12AU7 to 12BH7. I also note that some SET,s use 12AX7 and 12BH7 and 6C33C.
  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
12AU7/12BH7 Headphone Amp sorenj07 Headphone Systems 42 16th June 2007 01:14 AM
WTT your 6CG7 for my 6SN7 Andypairo Swap Meet 4 6th April 2007 07:56 AM
Ppp 6cg7/6sn7 Colt45 Tubes / Valves 4 27th September 2006 11:10 PM
12AU7 -> 12BH7 Do I need to change Rp? zxx123 Tubes / Valves 3 3rd March 2005 01:41 PM


New To Site? Need Help?

All times are GMT. The time now is 03:46 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