Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => PC Express and JSchem - Schematics and Layout diagrams => Topic started by: tubenit on March 31, 2007, 07:33:54 am

Title: Tone stack schematics (editable)
Post by: tubenit on March 31, 2007, 07:33:54 am

We get alot of questions about tone stacks on the forum.

I thought I would try to start a thread on these using editable tone stacks out of our SCH Library.  Remember you can save an entire tonestack design in "custom components" using the ExpressSCH program.

1 Knob tone stacks:

5E3 Deluxe & 5F2 Princeton
http://www.el34world.com/Forum/index.php?topic=572.0

Matchvox EL84 (similar to Matchless Spitfire)
http://www.el34world.com/Forum/index.php?topic=597.0

18 watt
http://www.el34world.com/Misc/Sch/18WattStout.sch

Title: Re: Tone stack schematic (editable)
Post by: tubenit on March 31, 2007, 07:40:35 am

Two knob tone stacks:

Dan Electro Centurian #275  (this one is modified with different resistor and cap valuesfor my Carolina Blues Special)  It is the smoothest/creamiest tone stack I've tried.
http://www.el34world.com/Forum/index.php?topic=568.0

look at the CBS-Dano stack
http://www.el34world.com/Forum/index.php?topic=565.0

Princeton Reverb
http://www.el34world.com/Forum/index.php?topic=576.0

Matchvox NightClub guy (like Matchless)
http://www.el34world.com/Forum/index.php?topic=597.0

Joe 6V6 amp
http://www.el34world.com/Forum/index.php?topic=2185.0

Carolina Blues Special   (* low insertion loss)
look at the CBS-O (original)
http://www.el34world.com/Forum/index.php?topic=565.0


Baxandall  (after 1st gain stage)  Dano Centurian (modded)
look at the CBS - Baxandall (actually James tone stack)
http://www.el34world.com/Forum/index.php?topic=565.0



Baxandall  (cathodyne follower)  
Look at Plexi 25w
http://www.el34world.com/Forum/index.php?topic=567.0

Look at Texas Raptor
http://www.el34world.com/Forum/yabb2/YaBB.pl?num=1163457605

5E7 Bandmaster
http://www.el34world.com/Forum/index.php?topic=573.0

5D8 Twin
http://www.el34world.com/Forum/index.php?topic=574.0


*note: the bright/full/fat switch on V1 Carolina Blues Special and Plexi 25w creates
          significant tone changes also

Title: Re: Tone stack schematic (editable)
Post by: tubenit on March 31, 2007, 07:44:16 am

Three knob tone stacks:

D'Lite   (compare to Dumble)
http://www.el34world.com/Forum/index.php?topic=1777.0

AB763  Deluxe Reverb         (compare to Twin 6G8-A)
http://www.el34world.com/Forum/index.php?topic=579.0


5F6-A Bassman  (cathodyne follower)
http://www.el34world.com/Forum/index.php?topic=571.0

Marshall Plexi 50w  (cathodyne follower)
http://www.el34world.com/Forum/index.php?topic=581.0

AC30  Vox  (cathodyne follower)
http://www.el34world.com/Forum/index.php?topic=575.0

Title: Re: Tone stack schematics (editable)
Post by: tubenit on April 01, 2007, 07:03:31 am

Here is a collection of 6 other tone stacks that I found. I have not tried all of these although I am familiar with the "T" notch filter and Baxandall/James. Most came out of the book "As Gar Sees It" which was written about/by Garnet amps.


If you see any other tone stacks that you personally use or have heard and think should be included, please PM me a message and I will try to get those added.

With respect, Tubenit

Title: Re: Tone stack schematics (editable)
Post by: tubenit on April 02, 2007, 09:39:09 pm

A few more .................


There is room to add to this page, so if you have any you wish me to consider adding that you have actually used or have heard ........ just leave me a PM & I'll get back to you.


With respect, Tubenit

Title: Re: Tone stack schematics (editable)
Post by: tubenit on April 15, 2007, 09:31:08 am

These are the T-filter tone stacks shared by Adamasd

The thread on this design is here:
http://www.el34world.com/Forum/yabb2/nph-YaBB.pl?num=1176634084

Title: Re: Tone stack schematics (editable)
Post by: jjasilli on May 06, 2009, 08:24:13 am

Traynor YGM-3 Guitarmate Baxandall Tonestack:  stock & modded.

Note re the stock schematic:  Many people remove the vol bypass cap shown in the stock schematic.  Some people replace it with a 10pF cap (as shown in the modded drawing.)

Title: Re: Tone stack schematics (editable)
Post by: darkbluemurder on March 09, 2010, 06:33:08 am

Quote from: tubenit on April 15, 2007, 09:31:08 am

These are the T-filter tone stacks shared by Adamasd

The thread on this design is here:
http://www.el34world.com/Forum/yabb2/nph-YaBB.pl?num=1176634084

Hi,

Unfortunately the link is not working.

Kind regards
Stephan