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
From an 80s Marshall ad: Fire your cartage company. You don't need a rack full of gear to get distortion that goes from subtle to stun gun. If you want all the range of a top studio pro, the Drive Master is for you.
O YEAH! Me likey a LOT! This WILL get built during Xmas. Only way to achieve https://www.youtube.com/watch?v=VQhuoY5h2kE short of cranking a wall of Marshall amps. The neighbors will be very grateful for this stocking stuffer!
I built this recently (thank you so much for the layout and all the AMAZING work you guys do), and I am thinking of modifying this build for bass. i tune pretty low, so i would need plenty of lows going through. Which caps would i have to change? Any info would be really appreciated! THANKS!
There's a high pass filter at the first opamp stage which consists of the 2K2 resistor and 100n cap to ground. That gives you a cut off frequency of about 720hz which means a lot of the low frequencies are going to be attenuated. To lower the point where attenuation starts you need to increase the value or the resistor, or cap, or both. I'd experiment there to fine tune it to your own taste.
Increasing the resistor value will also increase input impedance so there may be audible differences if you swap the resistor or the cap, even if the cut off frequency remained the same by the changes.
Check out this calculator to help decide what values to use in there:
Thank you so much. Do you think that lowering the cut off frequency to say 40 or 60hz would be excessive for a bass tuned down to B? Would it cause problems to other pedals later in the chain? Many thanx
Wrote a lot of nonesense about this one... Forgive me, I am still on the learning curve! ^^ Anyway... I found a schematic that was sending a number of components to VRef instead of ground, and that was including different values for a few components. I tried the VRef/ground thing, and it was a complete fail. Restored the connections to ground, and it now works like a charm. :) Here's a pic of my build, the blue channel being a Guv'nor and the red one the Drive Master: http://imageshack.us/photo/my-images/832/3ush.jpg/
I just built this one today and I like it a lot. for use with a bass I modded the HP filter stage 2K2 resistor and 220n cap with a 3K9 and a 1u. there's no loss of low end now.
Fun mod.. Remove the LEDs from the ground to pin 7, add a switch (DPDT on/off/on) for different LED combos (Say a Red/Green and a Yellow/Blue or 1n4148 and blue)
Then add another switch (DPDT, on/off/on) with a A20 pot in series with it.. put this between pins 6 and 7... When you have the 2nd switch off, and the first switch with the red/green combo it is 'stock'
O YEAH! Me likey a LOT! This WILL get built during Xmas. Only way to achieve https://www.youtube.com/watch?v=VQhuoY5h2kE short of cranking a wall of Marshall amps.
ReplyDeleteThe neighbors will be very grateful for this stocking stuffer!
Built this Pedal. With "Marshall" expected something special and it did not disappoint. Great saturation and sustain. Thanks.
ReplyDeleteExcellent, thanks for verifying Jon
DeleteHi!
ReplyDeleteI built this recently (thank you so much for the layout and all the AMAZING work you guys do), and I am thinking of modifying this build for bass. i tune pretty low, so i would need plenty of lows going through. Which caps would i have to change? Any info would be really appreciated! THANKS!
There's a high pass filter at the first opamp stage which consists of the 2K2 resistor and 100n cap to ground. That gives you a cut off frequency of about 720hz which means a lot of the low frequencies are going to be attenuated. To lower the point where attenuation starts you need to increase the value or the resistor, or cap, or both. I'd experiment there to fine tune it to your own taste.
DeleteIncreasing the resistor value will also increase input impedance so there may be audible differences if you swap the resistor or the cap, even if the cut off frequency remained the same by the changes.
Check out this calculator to help decide what values to use in there:
http://sim.okawa-denshi.jp/en/CRhikeisan.htm
Thank you so much. Do you think that lowering the cut off frequency to say 40 or 60hz would be excessive for a bass tuned down to B? Would it cause problems to other pedals later in the chain? Many thanx
DeleteThis comment has been removed by the author.
ReplyDeleteThis comment has been removed by the author.
DeleteThis comment has been removed by the author.
DeleteWrote a lot of nonesense about this one... Forgive me, I am still on the learning curve! ^^
DeleteAnyway... I found a schematic that was sending a number of components to VRef instead of ground, and that was including different values for a few components.
I tried the VRef/ground thing, and it was a complete fail. Restored the connections to ground, and it now works like a charm. :)
Here's a pic of my build, the blue channel being a Guv'nor and the red one the Drive Master:
http://imageshack.us/photo/my-images/832/3ush.jpg/
I just built this one today and I like it a lot. for use with a bass I modded the HP filter stage 2K2 resistor and 220n cap with a 3K9 and a 1u. there's no loss of low end now.
ReplyDeletepics:
ReplyDeletehttp://johnkvintageguitars.homestead.com/Effects/Fuzz-ODs/DriveMaster/drmaster-01.jpg
http://johnkvintageguitars.homestead.com/Effects/Fuzz-ODs/DriveMaster/drmaster-02.jpg
your pedals are so mind-blowingly beautiful!!
DeleteBuilt this today and must say this has a great range of distortion. Third successful bid of the weekend so time to make some sounds.
ReplyDeleteIf the pedal is on ,and the red led is on or off ,sorry my English is no good
ReplyDeleteplease, Where is the schematic?
ReplyDeletehttps://www.electrosmash.com/marshall-guvnor-analysis
DeleteThe Guv'nor and Drivemaster are pretty similar.. Like almost identical.
DeleteFun mod.. Remove the LEDs from the ground to pin 7, add a switch (DPDT on/off/on) for different LED combos (Say a Red/Green and a Yellow/Blue or 1n4148 and blue)
ReplyDeleteThen add another switch (DPDT, on/off/on) with a A20 pot in series with it.. put this between pins 6 and 7... When you have the 2nd switch off, and the first switch with the red/green combo it is 'stock'
The rest are fun
hi,
ReplyDeletewould you who built it with success share the parameters of the red LEDs you used? I mean, if it makes sense..
I think it does cause many of the red LEDs in the webshop available for me, for example, are specified for 2,5V.. or 2,6V while some are still 2V...
Now it looks like choosing by color and the diameter is not enough, or is it?