Recommended 6SN7 and 6SL7 - 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 1st May 2005, 03:02 PM   #1
diyAudio Member
Miniwatt's Avatar
Join Date: Nov 2004
Location: Den Haag
Default Recommended 6SN7 and 6SL7

I bought some Chinese amps with these tubes, changing them is said to improve a lot. I'm more into ECC etc. tubes, so I'll ask your opinions: which should I go for?

Sovtek is quite easy to get for me, are they recommendable?
  Reply With Quote
Old 1st May 2005, 03:42 PM   #2
diyAudio Member
Join Date: Feb 2004
Location: Elst
Default 6SN7-reply

Hello fellow Dutch tube-addict !

i fully agree with swapping the Chinese junk to more fine-sounding tubes.

Sorry; i can only speak on the 6SN7. Tube-rolling was EXACTLY the reason why i use this type so often. By simply swapping the 6SN7 "A" to type "B" you can really change the musical presentation without touching the soldering iron. Now that is handy indeed !
The technical data of this tube is very versatile. I found someday a notice that: "the 6SN7 was the tube that the USA made great". Now there are of course always nicer choises but for versatility......
Besided that the 6SN7 is made by a lot of manufactorors and there is a lot to choose from.
I got more than 100 matched 6SN7-pairs here......collecting them for quite some time.

In my set (picture included) you'll find the 6SN7:
- as the input tube of the 833-amp;
- as the main tube of the headphone-amplifier;
- as the output device for the phonostage.

What sound are you look for. Every 6SN7 has of course it's different "sound", but that is obviously very depending on the schematic/components/complete system.

So here are MY remarks, based on MY set.
1. Top:

My advise: get some pairs and start finding what YOU like (which is quite depending of the rest of the chain).

Option: 4 June is at Hoenderloo a "old radio fair". You can bet i'm there. And afterwarts our small audio-club is gathering in Ede at my place to discuss the latest topics, show the goodies from the fair, etc.
You're welcome to join.
I got enough 6SN7's.
  Reply With Quote
Old 1st May 2005, 03:58 PM   #3
diyAudio Member
Join Date: Feb 2004
Location: Elst
Default 6SN7-reply 2

Sorry.....was not finished yet !

Top of my list:
- Raytheon VT-231 (box anode)
- CBS-Hytron 5692
- Tung-So, VT-231 (THE roundplate)
- Sylvania 6SN7A
- Sylvania 6SN7W
- Ken-Rad VT-231
- Brimar 6SN7GT (oval plate)
- national Union 6SN7GT

Middle of my list:
- Hytron 6SN7GT
- Raytheon VT-231 (wafer-plate)
- GE 6SN7GTB sidegetter (green markings)
- GE 6SN7GTB sidegetter (Canadian manufacturing)
- GE 6SN7GTB topgetter (Japanese manufaturing)
- Sylvania VT-231 (chromedome)
- RCA VT-231
- Philips ECC32
- Mullard ECC33
- Valvo 6SN7GT

- Sovtek 6SN7
- National (by Sovtek)
- Teonex (re-stamped Chinese)
- RCA 6SN7GTB (coin base)

Again: strictly personal. And every tube has it's fevourote settings. Try a 5692 at wrong're treated with screaming highs !

As told before: you're welcome for i will not photograph every different 6SN7 i got ! But i do know i got a lot of them and you're more than welcome to start some tube rolling set here.

Maybe till 4 June (or other date)


Attached Images
File Type: jpg img_4133.jpg (88.3 KB, 1068 views)
  Reply With Quote
Old 1st May 2005, 04:44 PM   #4
diyAudio Member
Join Date: Sep 2003
Location: London
Don't know what you mean about substituting ECC types - if you mean 9 pin, then not a good idea - stick to octal, or indeed loctal. Now, if you want some cheap NOS 6SN7 type tubes change the sockets and go loctal with the 7N7. You even have the 7AF7 which is quite cheap and has round plates. Loctal is the cheap way to go with 6SN7 types. Or rewire the octal base, fit a topcap and use VT-99s, that's another nice 6SN7 style tube for not much money. Not a lot of people know that, as Michael Caine would say.....
  Reply With Quote
Old 1st May 2005, 06:26 PM   #5
diyAudio Member
Join Date: Feb 2004
Location: Elst
Default ECC32 and ECC33

Hi Andy,

the ECC32 and ECC33 are octal 6SN7-variants. The ECC32 is a straight subtsitute (but note that these beauties gobble away a lot more filament current). The ECC33 has a somewhat more higher gain.

Oh....these are not really cheap.
Included a picture of the ECC32 (2 variants)

Attached Images
File Type: jpg img_4323.jpg (88.2 KB, 961 views)
  Reply With Quote
Old 1st May 2005, 06:28 PM   #6
diyAudio Member
Join Date: Feb 2004
Location: Elst
Default ECC33


And here's the ECC33 picture. Can be quite handy with it's higher gain and EXACTLY the same pin-out !

2variants: a Mullard and a Philips with respectively black and grey OVAL anodes

Attached Images
File Type: jpg img_4353.jpg (91.2 KB, 961 views)
  Reply With Quote
Old 1st May 2005, 06:31 PM   #7
diyAudio Member
Join Date: Feb 2004
Location: Elst
Default 6SN7-pictures

Hi Miniwatt,

after posting your reply i thought: why not make a couple of pictures of some variants.

Just finished 40 different variants. And noted that i have here even more than 100 different pairs....

Attached Images
File Type: jpg kopie van img_4327.jpg (89.3 KB, 986 views)
  Reply With Quote
Old 2nd May 2005, 12:57 AM   #8
diyAudio Member
Join Date: Apr 2005
Location: AUD
Default Howdee 211 mate

check your email
  Reply With Quote
Old 2nd May 2005, 02:23 AM   #9
diyAudio Member
Join Date: Oct 2004
Location: Adelaide South Oz
I have a Chinese "Music Angel" 845SET and my experience is the same as yours.

Pulling the 6N9P first tube (used for SRPP input) and replacing with NOS Sylvania 6SL7 made a significant improvement.
Pulling the 6N8P driver (two sections paralleled in CC stage) and replacing it with NOS Sylvania 6SN7 made a HUGE improvement.

The Sylvania tubes were just what I happened to have on the shelf at the time.

  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
New production 6SL7 and 6SN7 m1garand Tubes / Valves 18 17th January 2014 09:30 AM
6sn7 and 6sl7 for sale jeff in WV Swap Meet 7 5th March 2008 12:36 AM
6SL7 to 6SN7 substitution in power amp? dmitriy167 Tubes / Valves 5 23rd June 2006 04:11 PM
Which tube? ECC82, 6SN7 or 6SL7 CambshireGordon Tubes / Valves 8 14th November 2005 10:42 PM
Preamp with 6sn7 & 6sl7 SRPP ??? Gregouille Tubes / Valves 4 18th June 2002 10:41 PM

New To Site? Need Help?

All times are GMT. The time now is 10:40 AM.

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