Here's a collection of vero (stripboard) and tagboard guitar and bass effect layouts that we have put together covering many classic and popular effects in growing numbers. Many of these have been posted on freestompboxes.org, so check that site out for great discussions on building your own effect pedals. Enjoy the builds and please also visit us on Facebook and Twitter
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Saturday, 11 August 2018
Baja 59 Tweed Bassman
Bajaman's overdrive circuit based on the Fender 59 Tweed Bassman amplifier.
Original thread and schematic available on the FSB forum here.
I want to thank all of this site for there work over the years. I have made a layout of the Marshall 1959 SLP and also the Dumble, but for some reason, I can't publish them. I have also mad a lot of other layouts of amps and pedals.
Hi! Can anyone tell me what function the transistor has in this build? Is it just the buffer? In that case it would´nt be a problem to use another than the 2sk117 which is very hard to get.
"the input and output buffers are realised by 2SK117 N channel Jfets in this design - I am sure any small signal N channel jfet such as 2SK30, J201 or 2N5457 etc would work for these buffer stages."
J201 and 2n5457 are getting scarce in through-hole, but the 2sk30 is available at Tayda.
Bass needs to be a 50K log. I've built two of these and with lin the sweep happens within the first parts of the rotation.
Circuits sound just that on the design itself. It's prone to poor filtering issues too (ie you use a bad supply), it'll be noisy unless pots are all half rotations. Put a 10R resistor after the 9V if you're uncertain kr get that.
Thanks for including the EQ on the board...
ReplyDeleteGreat!! I wait for Plexi 1959, they are same i think!
ReplyDeleteThanks Alex!
ReplyDeleteHey Alex, thnk you again for this one! If possible, could you do Baja's "Dumble style" pedal circuit?
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteHow about the Deep Trip BOG.
ReplyDeleteGreat work guys.
This comment has been removed by the author.
ReplyDeleteHello!
ReplyDeleteI want to thank all of this site for there work over the years.
I have made a layout of the Marshall 1959 SLP and also the Dumble, but for some reason, I can't publish them.
I have also mad a lot of other layouts of amps and pedals.
Maybe put them in the forum.
DeleteHi! Can anyone tell me what function the transistor has in this build? Is it just the buffer? In that case it would´nt be a problem to use another than the 2sk117 which is very hard to get.
ReplyDeleteIt is a buffer. You can use other JFets but mind the pinout.
Deletethanks!
DeleteHere's a quote from Bajaman himself about this:
Delete"the input and output buffers are realised by 2SK117 N channel Jfets in this design - I am sure any small signal N channel jfet such as 2SK30, J201 or 2N5457 etc would work for these buffer stages."
J201 and 2n5457 are getting scarce in through-hole, but the 2sk30 is available at Tayda.
Leif where do you live, I can send you a 2SK117 if you like!
DeleteUmeå...
DeleteCool, much appreciated been waiting for this.
ReplyDeletestill unverified?
ReplyDeleteWorks great I don't know why it isn't marked verified yet, but you definitely can. I used a j201 for the jfet.
ReplyDeleteThanks, I'll tag it
DeleteBass needs to be a 50K log. I've built two of these and with lin the sweep happens within the first parts of the rotation.
ReplyDeleteCircuits sound just that on the design itself. It's prone to poor filtering issues too (ie you use a bad supply), it'll be noisy unless pots are all half rotations. Put a 10R resistor after the 9V if you're uncertain kr get that.
Oh and J201 fine, just watch the pinout (have to swap the source and gate legs around on the jfet itself).
ReplyDelete