6L6 vs EL34 - 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 8th October 2004, 11:27 AM   #1
Account Disabled
 
Join Date: Sep 2004
Location: Earth
Question 6L6 vs EL34

Hi
I was designing an amp with 6L6.But a friend of mine stopped me

and ask me why I'm going with 6L6 and not with EL34.

He believes that EL34 sounds better than 6L6 and that I can achieve the same power.
But........
As a newbie I'd like to ask some other people opinion.
What do you say?
  Reply With Quote
Old 8th October 2004, 11:44 AM   #2
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
I'd say find some friends who are less certain in their opinions.

You can make an excellent amp with either of these output tubes, as long as the design is sound. Both work well in the 50 watt range. The EL34s have higher gain and are a bit easier to drive.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  Reply With Quote
Old 8th October 2004, 12:55 PM   #3
diyAudio Member
 
Brett's Avatar
 
Join Date: Jan 2002
I pretty much agree with SY, but it depends on what you're trying to do. In Class A triode, my preference is for the EL34, but I've built a couple of very nice 6L6 variants. In AB and/or terode/pentode the choice is less clear cut for me, but if you're not bothered by topcaps, there are a bazillion great old 807's out there that can be had really cheap. I like the look of the ST bottle too....

In the end, it depends on the circuit and implementation.
  Reply With Quote
Old 8th October 2004, 01:31 PM   #4
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Default 6L6 vs EL34

I should add that these are not the only alternatives in this size/power range. Others should be considered.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  Reply With Quote
Old 8th October 2004, 05:09 PM   #5
DougL is offline DougL  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Wheaton IL.
Blog Entries: 30
Quote:
I should add that these are not the only alternatives in this size/power range. Others should be considered.
I was curious what your list would look like?


Doug
  Reply With Quote
Old 8th October 2004, 05:17 PM   #6
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Depends on how adventurous you are and your willingness to chase NOS. In the NOS category, the "super" 6BG6s that have been around at attractive prices are a great choice. They like to see 6600 ohm plate-plate. 6JN6 and similar medium-power sweep tubes are also bargains that perform extremely well with the right circuit. EL38s can still be found. EL37s are spectacular, but fairly unobtainable. I'd look at paralleled EL84s, and (if they're actually reliable and meet spec) 7591s.

If I were doing a new commercial design today, I'd be using EL509s.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  Reply With Quote
Old 9th October 2004, 12:50 AM   #7
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi resident,
There is nothing wrong with 6L6's or their variants. I own amplifiers using 6L6's, 7591's, EL34's and 6BQ5's. I'm sure I have others too. I'd worry more about the iron and the layout.
If you are thinking tube life, a 6L6GC is a 30W, EL34 is 25W and 7581A/KT-66 is 35W. 5881's are rated at 25W. Pushing a 25W tube into the 50W range may shorten tube life a bit, or increase distortion. This depends on your design.
Design away and enjoy, try another tube on your next design if you are curious.
-Chris
  Reply With Quote
Old 9th October 2004, 05:34 AM   #8
diyAudio Member
 
Geek's Avatar
 
Join Date: Sep 2004
For Hi-Fi, either are excellent. For guitar amplifiers though, use the EL34 for your bass guitar and the 6L6 for your 6 or 12 string
  Reply With Quote
Old 9th October 2004, 03:04 PM   #9
Account Disabled
 
Join Date: Sep 2004
Location: Earth
My plan is to use 6L6 or EL34 in CFB P-P configuration. But Iíd like to try them in UL, tetrode or pentode and triode P-P, too. You know, with the classic method by changing connections at taps of OPT. Just to see the difference with CFB! So, choose any tube I like? I like to drive them at 30watts. I think Iíll go with 6L6.
At Va = 400-450V, Ia=50-60mA and AB1 P-P.

@SY and Brett
I know that there are a lot of tubes out there with same size/power range. But, as a newbie Iíd like to try some usual one. If I start to think about alternatives, Iíll go..
Even right now I canít decide btw those two!
  Reply With Quote
Old 9th October 2004, 03:12 PM   #10
Account Disabled
 
Join Date: Sep 2004
Location: Earth
@SY
EL509 !!!!!!!!!!!!!!!!!!!!!!!!I like them ,too.
But on next project.
  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
El34 PP Vs. El34 PSE alexmoose Tubes / Valves 47 6th September 2006 05:44 PM
My El34 SET alexmoose Tubes / Valves 10 9th May 2006 08:10 PM
EL34 CCS help navin Tubes / Valves 2 25th March 2006 02:59 AM
4 x PSE EL34 Hojvaelde Tubes / Valves 1 24th March 2006 01:26 PM


New To Site? Need Help?

All times are GMT. The time now is 07:53 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