Hey all, I have enjoyed stopping by this forum and hanging out for a "read and write" here and there. I know this year, times are tough, and many guitar players will not be able to get new guitar goodies. In the spirit of giving I thought I could share a schematic of a Barber pedal that many players have liked and some have been interested in the circuit. This way if money is tight you can still build a fun circuit and save some dough...and of course have fun inhaling good ol RoHS endorsed fumes! :icon_smile:
Try a JRC 072BD for the op-amp...or whatever you like. I'll stop by and try to be of help with this circuit if anyone has questions.
Here is a link to the Barber DIY page, I have a schematic of the Barber Silver LTD and some mods are on the schematic to make it a little more fun.
http://www.barberelectronics.com/Barber_Electronics_DIY.html (http://www.barberelectronics.com/Barber_Electronics_DIY.html)
Please don't post the schematic image to websites, if you would like to share the schematic, just link to the Barber Electronics DIY page it its entirety. I would appreciate it if this was not redrawn...thanks all!
Thanks again Aron, for the fun place to read and share, about DIY guitar effects!
Thanks for posting!!!
Dave
Very cool! Thanks!
Thanks, cool stuff. :icon_cool:
Unreal. Thank you Dave and GOOD LUCK on your future projects! Hope you have a great holidays!!!!!!!!
Pure class Dave! Pure class.
There is a Santa Claus.
Thanks, Dave!
I confess to having been somewhat skeptical about the whole light-overdrive-as-a-pedal concept (as opposed to turning down the gain on any flat-eq-type od, like a BD-2), but I have high regard for Dave & his stuff, so its definitely worth a breadboarding. I do love my Direct Drive, and wouldn't mind getting my mitts on a Burn Unit some time.
Thanks! :)
Brill!
Many thanks for sharing the schematic - proper spirit of Christmas and all that.
One question though - is Mr.Barber the portly gentleman in red with the big beard?
Have a great Christmas all...
:icon_wink:
Awesome!
Wow, this is a great thing to do, David. Thanks!
I own a Silver LTD and it is an outstanding pedal.....I highly recommend people build this. I own a couple of Barber pedals and I sing their praises to every guitarist I meet because they are so good.
David and all forum members - have a great Christmas and New Year.
Andy.
Thank you very much, and Merry Christmas to you Dave!
The various trimpots surely make this design a very tunable pedal.
Certainly a nice gift for these holidays.
Thanks, and happy holidays for you too!
I just wish other builders did the same. I'd much rather donate a schematic to the DIY community than let people reverse one while saying "this guy is a dick, he uses goopo-mojo-sticky-black-goo", or "i wouldn't pay 200 bucks for this", or even "oh, i'm so @#$%ing jealous of his business i'm going to insult this bastard!"
Kudos, Mr Barber ;)
Thanks for sharing! RIAA-style tone shaping on the second op-amp, presence control... Very cool, and great timing with this schematic as these two ideas have come up as topics here recently.
I've never considered buying a Barber product before, but after seeing the inner workings of this one, I think I just might.
Thanks Dave! Have a Merry Christmas! And don't be a stranger... :icon_wink:
In a time of belt-tightening, it is gratifying to see someone who hasn't forgotten the spirit of generosity. Good on you, my friend. Enjoy the holiday!
I really need to learn how to read op-amp schematics. :(
The Barber DDSS is permanently attached in my pedalboard. Barber pedals are the ones I like the most, they sound great, build quality is simply astounding and one of the cleanest out there, and best of all...........pricing is great, specially now with the USD-EURO ratio we have.
How different is the LTD silver from the Special Recipe? because actually I was considering buying one.........
Thanks David !!!
Railhead, just get the data sheet for the pinouts of that IC and you'll find that all mysteries will be revealed.
You'll also find some fairly standard pinout arrangements and likely begin to learn them by heart when you start
looking at a lot of schematics like the one above.
Happy Holidays Dave Barber, and to all !!
Nice present ! [for those inquiring about clipping w/midrange, presence etc. there ya' go !
Who is playin those clips ? Also great instructionals if you can figure out some of the advanced techniques played on some of those clips !
Railhead: This could be built with 1 dual opamp or 2 single opamps, the pinouts Are Different, and I'd use 1 dual opamp...why not..saves real estate !
Quote from: earthtonesaudio on December 19, 2008, 07:49:48 AMI've never considered buying a Barber product before, but after seeing the inner workings of this one, I think I just might.
You should see an actual pedal--they are beautifully built, without so much as a milimeter of extra wire clutter, but all using full size components, not unlike some of Dragonfly's builds. Barber pedals come in very low on the booteek-mojo-BS scale (no unobtainium involved), and very high on the quality-value scale, and they seem well-designed as real-world solutions to real-world needs. I definitely recommend checking them out.
Wow! Amazing. As if we needed anymore reason to respect David.
Thanks. :)
Andrew
Very cool, thank you!!
I like his style, it's neat to see pedals with internal trimmers so you can get some extra tweaking in.
Barber just moved to the top of my list of pedal manufacturers to support. The next time I buy I pedal, I promise you , I will look at Barber first.
Thank you
-chris
David....
What are your thoughts on layouts? If someone designs a layout for the schem, can they share/post in this thread or would you prefer it not be publicly viewable?
Just want to make sure we don't step on any toes and ruin a very very generous gesture.
thanks
-chris
What's the difference between the silver version and the black one?
Quote from: petemoore on December 19, 2008, 10:22:27 AM
Happy Holidays Dave Barber, and to all !!
Nice present ! [for those inquiring about clipping w/midrange, presence etc. there ya' go !
Who is playin those clips ? Also great instructionals if you can figure out some of the advanced techniques played on some of those clips !
Railhead: This could be built with 1 dual opamp or 2 single opamps, the pinouts Are Different, and I'd use 1 dual opamp...why not..saves real estate !
The clips on my site are by the only player I can afford...me! :icon_biggrin:...I am sure they will be the same licks I use on the next 20 pedal demos, I don't have time to learn a few more. I also played a bunch of Tom Anderson's guitar pickup clips using a Silver LTD, here is a link to get an idea what the SLTD sounds like.
One JRC 072 works well for this design, but some players like to sub a Burr Brown chip...whatever sounds good, is good. :)
Quote from: cpnyc23 on December 19, 2008, 07:10:04 PM
David....
What are your thoughts on layouts? If someone designs a layout for the schem, can they share/post in this thread or would you prefer it not be publicly viewable?
Just want to make sure we don't step on any toes and ruin a very very generous gesture.
thanks
-chris
Sure make a layout and post it if you like, I won't mind as long as it does not become the next $400 swirly mojo pedal. :icon_biggrin:
I have changed the black LTD from the original, if you fool around with the EQ using the Duncan tone stack tool, you can find some good starting places and then you go the final distance by ear using extra pots and plug-in caps. For the different LTD versions we change the EQ stack and adjust the 13.3k or the 100p, or the output...The early black LTD had a small series resistor to the input of each of the amps...I just do what my ear likes, and what I can prove will last in use. This is a really simple circuit that is easy to mod, some people might like to put a cap before the 1k from the output of amp 1 to keep the noise off of the tone pot, I like the sound better without the cap, and with a load added to ground and I accept a little noise when turning the tone pot :icon_eek:, if you remove the load then you most likely will want to tame the signal before the input of amp 2, to keep the adjustable RIAA recovery stage from getting squirrely . :icon_smile:
Thanks to Faderjockey (Ronni) from for pointing out a goof on the first post of the schematic, I had a .01 cap noted as a polar cap when indeed it was not...trivial but certainly worth the fix, and of course Ronni enjoyed ribbing me about it! :icon_cry:
Of course I forgot to add the link to the Silver LTD being used for Tom Anderson's pickups. :icon_surprised:
http://www.barberelectronics.com/pickuptest.htm
great. Another pedal to build. Just when I thought I built enough already. Awsome Dave!!! We just need a great layout now. I rarely buy effects these days but i do want to buy the Tone Press. Tons of great reviews!
Man, You are a great player :icon_cool: Thanks for the circuit and very inspirational clips. Ok, back to practise :icon_redface:
Matti T.
Cheers for the early Christmas present :)
Here is the first pass at a layout. It is yet unverified, but checks out in Eagle. I designed for a 1590B or 125B so it's not as neat as I'd like, but hey it's just a box, right?
clickey image for biggie
(http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev0_TN.gif) (http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev0.gif)
That looks good, I like the more compact layout for the 1590b! I can't verify it at the moment, I need to merge the layers to be able to run a faster more accurate check of traces, pads and components (I am a little slow on the uptake :icon_mrgreen: . Can we write diystompboxes on the bottom instead of Barber? I don't really want credit on the PCB, it is your art, and hopefully a project this forum can enjoy...great work on the speedy PCB layout!!
I've done a vero layout if anyone's interested. I drew it with plenty of space for the trimmers so you can use whatever style you like, but if you want it a bit smaller use inline trimmers and reduce the width on the right hand side.
(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=38060&g2_serialNumber=1)
Once again thanks to Dave for sharing this.
I have the Barber LTD, I guess black, and it finally kicked my fulltone fulldrive and fat boost off the board- I love that pedal. But now I might need to build this, just cuz!
Very freaking cool to post this, but I will still buy more of your pedals cuz I need more, more, more!
Merrry Christmas to you and Ronnie :)!
(http://www.aronnelson.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=38065&g2_serialNumber=1)
Verified ;D
This is one sweet sounding circuit.
I've verified my PCB layout as well. However, I ran into a couple of issues with spacing on the trim pots so I will revise and upload the final version.
Here is rev. 1.0. Enjoy.
(http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev1_TN.gif) (http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev1.gif)
I can't open the website that has the schematic :icon_confused:
Just posted a perf layout for this circuit in my gallery, thank you David !!!!!
Just saw this. Thanks !!! :icon_cool:
AL
QuoteJust posted a perf layout for this circuit in my gallery, thank you David !!!!!
I believe I've found a couple of minor errors on your layout. According to the schematic C5 (cap from 4.5V to ground) should be 47uF not 4.7uF. Junction of R4 (470R) and R3 (13.3k) should connect to 4.5V
Cool, nice of Mr. Barber to stop by and contribute something here. :icon_razz:
I have a friend named Steve who uses the Barber Burn Unit. He really digs it a lot. :icon_cool:
awesome dave.
I guess I know what to work on now =D
thanks!
Thanks Dave! ;D ;D
I love your designs and ideas!!
A very nice gesture, and I hope the good Karma comes round to bring you happiness and success.
Any schmuck could slap together pedals and try to market them, but kudos to all those who take pride in their work and are willing to help out others in these fun activities.
Edit: so, I think I'll build this nice gift from Mr. Barber as a gift to myself.
What does it sound like so I know what to expect?
Thanks.
Quote from: drewl on December 30, 2008, 03:16:32 PM
What does it sound like so I know what to expect?
http://www.barberelectronics.com/sounds.html (http://www.barberelectronics.com/sounds.html)
A very generous gesture from Mr Barber!
You don't see many (any) pedal guys doing that do you!
Happy New Year!
The more I study this design, the more impressed I am. There are several design features I haven't seen before around here. The EQ from the Presence and RIAA section, along with the tone control should provide a multitude of variations.
Dave definitely should not be lumped in with boutique-rs that just copy existing designs without any innovation of there own.
Although I probably won't build this, as with other schematics posted here from big time pedal builders, I appreciate the educational opportunity (secrets) that Dave has provided. Thanks again and I hope your generosity is returned many times in the coming year. :icon_cool:
To be fair, Dave has pretty much openly announced the RIAA post-eq thing right here a long time ago. He left it to us to find our own ways to implement. Since then I have seen exactly one attempt to do so, so now it has been spelled out.
This is great, the small fry is a great unit.
Im hoping I can get through this in the next month.
Thought someone interested in this circuit would also be interested in Dave's suggestions for mods, from a previous thread (http://www.diystompboxes.com/smfforum/index.php?topic=54365.0).
Just want to say thanks to Mr. Barber! My old 4-knob Burn Unit is one pedal I'll never sell, BTW and FWIW.
Barber pedals are my favourite dirt boxes. They sound awesome, build quality is top notch, and they are rock solid.
And, their pricing................well I don't want to start yet another price / features discussion, but frankly speaking some pedal makers out there should be seriously ashamed to charge what they charge for what they offer. Having seen myself an average quality TS clone for almost 300 USD done with perfoard and sloppy wiring, opening any Barber pedal makes you wonder why isn't everybody using a Direct Drive or LTD.
And still you can have an extra board with many more tone shaping options, even a buffer............. a Silver LTD for 99 USD is a steal, for God's sake, that's 73 euro !!!! which boutique pedal costs this? NONE !!! any other TS clone we can buy in Europe is minimum 100 euro.........
So, end of the rant :icon_rolleyes:.
Barber rules !!!
Wow. Glad I stumbled by this. It is now #2 on my "to build" list.
Very cool.
Does anyone know where to get a JRC072 or will a NJM072BD work just as good?
Check out the other thread http://www.diystompboxes.com/smfforum/index.php?topic=73269.0 (http://www.diystompboxes.com/smfforum/index.php?topic=73269.0) sounds like pretty much anything will sound good.
I might be wrong but isn't a JRC072 just another name for the good old TL072 anyway?
It is the same chip although I believe it has slightly better specs (slew rate). I could be wrong though...
-chris
Hi m8s, I've searched but I've found no answer, what LTD stand for ?
Thx
Armando
Little Tiny Dogs
I thought it was Latin Tippy-Toe Dancers
Like That Distortion?
Most likely Limited
john
(http://www.flee.com/ltd/brochure/75_ford_ltd_brochure_cover.jpg)
ok I take there's no real meaning for LTD, I though it could be something like Low Tube Drive, as I think, it could "drive" a tube amp almost everywhere, isn't it?
Cheers and have a nice week.
Armando
LTD has been used as an abbreviation and "brand" for things that were issued in a limited edition. In cases like the Ford LTD, the idea was to create the impression that only select individuals would have one, although realistically they would have been happy to crank out as many as customers asked for.
I just wanted to thank Mr. Barber for his design and bean for his layout - excellent... I have finally found the overdrive I've been looking for. I did try the gain mod posted by Ben N earlier in this thread - went with 4.7K in place of 13.3K and .1uf in place of .027uf - If I read the mod correctly these are the ones to change - I may even go with the 1K and .22uf for more gain, you can always dial it back with the external control. I recommend this build to anyone searching for a versatile overdrive.
I simulated the RIAA like tone section of the second opamp and found its transfer interesting.
I'll try it in an overdrive for sure but then with a "Stupidly Wonderful Tone Control" lowpass tone control instead of a Big Muff Pi mid-scooped tone control.
Picts of the RIAA like tone section of the second opamp:
Bass [0,100], Mid 0
(http://i279.photobucket.com/albums/kk146/flo0987654321/SilverLTD-BarberElectronicsRIAAB-1.jpg)
Bass 0, Mid [0,100]
(http://i279.photobucket.com/albums/kk146/flo0987654321/SilverLTD-BarberElectronicsRIAAB-3.jpg)
Bass [0,100], Mid [0,100]
(http://i279.photobucket.com/albums/kk146/flo0987654321/SilverLTD-BarberElectronicsRIAABass.jpg)
Bass [0,100], Mid [100, 0]
(http://i279.photobucket.com/albums/kk146/flo0987654321/SilverLTD-BarberElectronicsRIAAB-2.jpg)
Schematic:
(http://i279.photobucket.com/albums/kk146/flo0987654321/SilverLTD-BarberElectronicsRIAAsche.jpg)
Has anyone put this to PCB layout yet?
There's one on the second page of this thread :)
I am blind.. carry on. ;D
Can someone explain me how the presence control functions? I understand the very basics of high pass and low pass filters, but don't really get how it works in this setup.
I have a TS clone which has a 0,22n cap and 1K resistor to V.R and would like to add this feature, but with the possibility to keep the original sound (or to dial it in with the presence control). With these starting values, can I simply add the 470 resistor, 10K pot and 0,01 cap or should I change these values (and if so, how?)? How can I then dial in the "original" sound I have right now? Just by turning the control fully up or down, or do I have to "find" it somewhere along the travel of the pot?
Gentle bump
Wow, what a great circuit! Thanks for sharing this. After going through 20+ overdrive/light distortion units I think I have finally found my sound.
One question, I found the Bass and Mids controls very useful and want to replace the trimmers with full out pots. Is a linear taper ideal here? It seemed that the taper was not very smooth with the trimmers, but I could be wrong.
Only if you feel that the useful settings are bunched up at the anti-clockwise beginning of the pot, a log taper can help.
If the useful settings are bunched up at the clockwise end of the pot, a reverse log taper can help.
Well I have already boxed this up with linear pots, and I can't stop playing it. Not only is it great as a stand alone on a clean channel, it does beautiful things pushing a high gain amp as well. Best metal tone I have.
QuoteBest metal tone I have
Que?
Quote from: ayayay! on May 22, 2009, 08:57:34 AM
Que?
Not the pedal itself, the pedal in front of the Gain channel of my Randall Pro-Tube 2000. Beautiful harmonics, dynamic response, controllable feedback and the perfect amount of gain. A Bit like early Metallica, with a hair more gain.
Thanks for the schematic! just built it, sounds fantastic I must say. ;D I brought the bass control out to the front.
Anybody know where to find a datasheet and/or a source for JRC 072BD?
JRC stands for Japan Radio Corporation. A few years ago they changed their name to New Japan Radio or NJR for short.
Their site is here: http://www.njr.co.jp/index_e.htm
Here is a link to the part you are looking for:
http://semicon.njr.co.jp/njr/hp/productDetail.do?_isTopPage=false&_productId=6&_moveKbn=PRODUCT_DETAIL_MOVE_SPEC
Any dual opamp will do. For instance a low cost TL072 or a high cost OPA2604.
Anybody successfully printed Madbean's layout? It says 600dpi but opens in Photoshop as 72dpi and it's already huge. Changing resolution to 600 makes it enormous. Help??
Phillip
Open it up in PS and select a .1 grid in preferences.
Set the resolution to 300 and mode to RGB.
Select and then scale it while holding down shift.
The Pins of the IC will line up with the .1 per inch grid
when it's the right size.
Either that or email me and I'll send you the layout sized
correctly. :)
John
In Photoshop: use Image Size - uncheck 'resample image' and type in 600 for the resolution. It will be properly sized.
Thanks John and Brian! Both solutions worked well! Can't wait to get started on this.
Just breadboarded this circuit and I love it! It's all I could ask for in a transparent overdrive.
Since I like to keep things simple, I was hoping maybe Mr. Barber could enlighten us with the factory default settings for the trimmers in the circuit... perhaps even suggest stock fixed resistor values as he does for the mid control.
Again, thanks for this fantastic circuit!
Just finished mine today (from Madbean's layout, thanks ;)).
(http://i293.photobucket.com/albums/mm62/deaconque/pedals/PA252309.jpg)
I built it and it sounds good. TR1, TR2 and the Tone Pot doesn't change the sound?! I checked the traces, I checked the pots the ..everything.. I even resoldered the damn trimpots because I thought I fried them.
The sound (as it is) is very cool with out the use of the obviously not working pots but ar ethere any suggestions about what could be wrong?
I used this layout: http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/diyltdboard.jpg.html
Would it be ok to post some voltages or any other stuff? I don't know what could be wrong.
Quote from: tuckster on May 29, 2010, 11:30:41 AM
I built it and it sounds good. TR1, TR2 and the Tone Pot doesn't change the sound?! I checked the traces, I checked the pots the ..everything.. I even resoldered the damn trimpots because I thought I fried them.
The sound (as it is) is very cool with out the use of the obviously not working pots but ar ethere any suggestions about what could be wrong?
I used this layout: http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/diyltdboard.jpg.html
Would it be ok to post some voltages or any other stuff? I don't know what could be wrong.
I had the same issue when I built mine. I think I adjusted some values inside slightly but I can't remember for sure, it didn't really help. This pedal is what it is and doesn't do a whole lot else but it does sound great.
Yes in deed. But somewhere I read about the flexibility " it is so flexibly and can produce a lot of different sounds because of the trim pots" - that's simply not true :D
Maybe I have to buy the original to get this flexibility. But to be true - I don't need flexibility because, as mentioned before, it sounds really good.
The external tone control is very subtle. Presence is pretty subtle but Mid and Bass trimmers should make a noticeable difference - mids particularly.
All mine work fine....tone control has a pretty big sweep on mine......presence doesnt do that much though...
Quote from: deaconque on October 25, 2009, 04:45:57 PM
Just finished mine today (from Madbean's layout, thanks ;)).
(http://i293.photobucket.com/albums/mm62/deaconque/pedals/PA252309.jpg)
I really like the graphics on that enclosure.
What type of enclosure is that ?
That's one I picked up from Experimentalists Anonymous a while ago. Not bad for $4 but it's a much harder metal to drill through than the standard box.
Hi fellas!
I'm just curious, was somewhere already mentioned what are "factory settings" for PRESENCE and BASS trimpots?
Thanks, T.
Quote from: bean on December 21, 2008, 02:14:38 PM
Here is rev. 1.0. Enjoy.
(http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev1_TN.gif) (http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev1.gif)
Is there any mirror of this anywhere? Or an updated PCB?
Quote from: BoxOfSnoo on August 04, 2010, 05:38:35 PM
Quote from: bean on December 21, 2008, 02:14:38 PM
Here is rev. 1.0. Enjoy.
(http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev1_TN.gif) (http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev1.gif)
Is there any mirror of this anywhere? Or an updated PCB?
http://www.diystompboxes.com/smfforum/index.php?topic=83838.msg697351#msg697351
The image is small but maybe madbean can provide a proper resolution :D
Quote from: tuckster on August 04, 2010, 06:44:16 PM
Quote from: BoxOfSnoo on August 04, 2010, 05:38:35 PM
Quote from: bean on December 21, 2008, 02:14:38 PM
Here is rev. 1.0. Enjoy.
(http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev1_TN.gif) (http://www.madbeanpedals.com/builds/ltd/BarberLTD_rev1.gif)
Is there any mirror of this anywhere? Or an updated PCB?
http://www.diystompboxes.com/smfforum/index.php?topic=83838.msg697351#msg697351
The image is small but maybe madbean can provide a proper resolution :D
Thanks! I fought through it this morning and came up with this: (Not verified yet)
(http://jonandtina.net/static/images/Barber%20LTD%20v2.png)
Parts list the same as on MadBean's layout. Any gross errors anyone can see? (I fixed a little one on the bottom-left corner, plus colored the traces so I could see what was +9v, GND, and +4.5V)
The image in the last post has been updated, I had the wrong orientation for one of my electrolytics.
I built it, but it's quite quiet, and the drive knob doesn't do anything - it's like max drive all the time. Does the latter problem ring any bells to anyone?
Quote from: BoxOfSnoo on August 24, 2010, 10:11:18 AM
The image in the last post has been updated, I had the wrong orientation for one of my electrolytics.
I built it, but it's quite quiet, and the drive knob doesn't do anything - it's like max drive all the time. Does the latter problem ring any bells to anyone?
Sounds like you may have accidentally built the Zakk Wylde version...
Ok I found a small but significant bug in that layout... here's the updated version. Which WORKS! :icon_mrgreen:
(http://www.jonandtina.net/static/images/Barber%20LTD%20v3.png)
I don't know how to edit the last one, so I may have to just delete the source image... I'll leave it up for the moment so others can learn from my mistake.
Here's the most recent PCB version I did...in case anyone needs it:
Silverfox ver.3 (http://www.madbeanpedals.com/projects/Silverfox/docs/Silverfox_ver3.pdf)
Quote from: bean on September 15, 2010, 11:16:18 PM
Here's the most recent PCB version I did...in case anyone needs it:
Silverfox ver.3 (http://www.madbeanpedals.com/projects/Silverfox/docs/Silverfox_ver3.pdf)
Heh I'm almost glad I didn't see this until now. That would have killed me to have a huge revision just as I was debugging the last one.
I replaced the 150k tone resistor with a 47k and the tone control is very nice now. I couldn't hear the 150k at all for some reason.
The only issue I'm having now is squealing/oscillation when the output is turned up to about 3:00 (way past unity). Otherwise, this is a SUPERB overdrive!