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Pedal Mods - Boss GE-7 Equalizer - Noise Reduction/Hi-Fi Mod
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- čas přidán 6. 05. 2015
- IC1, IC2, IC3 - change to low noise op-amp. -- OPA2134, NE5532, etc.
C21, C22, C32, C10 - change to 1uf monolythic
C9 - change to 680nf -- 0.68uf
C8 - change to 330nf -- 0.33uf
C7 - change to 150nf -- 0.15uf
C6 - change to 100nf -- 0.1uf
You're giving us very precious information with the list of electronic components ! Furthermore it gives the feeling to understand the wiring behind. Thank you !
Thanks!
I can't believe that no one has commented on this yet. Thank you for this most excellent and very detailed guide!
Peter W. Camelton You're very welcome, friend. Glad you enjoyed it.
Super video Adam. The GE7 is fatally flawed by its noise but you've essentially found a way to turn a relatively cheap pedal into solid EQ. Thanks for making this video! Love from Ireland
Hey man, glad you enjoyed. Just to reiterate though, this mod wasn't my idea originally, but it was freely available on the internet. I just made a video to show how to do it. Cheers!
Very good guide. I could not be bothered to change all those caps. I am happy to confirm that by replacing the OPamps with NE5532's all the hiss has gone. Changed the pedal from a pile of S**** to a very useable device. I kinda feel that the adjustments have more range now. Not about to swap the chips back for an objective test though. Many Thanks for posting this.
Glad to help man. One thing I forgot to mention in the video is that the replacement chips will draw more power. So if you're using batteries, be prepared to change them more often. Power supply people won't have that problem.
That may explain why the other chips were in there in the first place. I just could not figure out why Boss would want to save a few cents and put cheaper op-amps in. Perhaps those sales people that business let do all the engineering these days said battery life is more important! I have isolated DC supply so not an issue for me.
I just did the mod and is craaaazy good, thank you very much :D
Ps: I was able to change the led, just removed the solder, pulled and it came out
Awesome, glad it worked out for you!
Thata how solder works
Thanks for taking the time to show this Mod Adam, gave me the confidence to have a crack. I only changed OP amps with NE5532's and can definitely confirm its a very easy mod with great results - nearly all the hiss has gone. Not sure my ears could hear the difference with changing the caps, so haven't done this mod, unless someone can confirm you really can hear the difference?. Cheers.
Nice video! I just did this mod to my GE-7...used 5532s and yes, made quite a big difference. Kudos from a fellow Canuck eh! (no mistaking that accent lol)
;)
Thanks for this video, I've always wanted to be able to do this sort of thing myself instead of having someone else do it.
Me too!
Sweet. I'm almost ready to try this. Almost.
Fantastic mod! And superbly explained and detailed in this video. I have an excellent bass preamp that I would love to reduce the hiss on and I was just wondering if similar train of thought could be applied to making it a little quieter? Anyone think it's possible? BTW there is an EQ just like the boss kicking around out there with no noise or hiss called the Biyang EQ-7. It's also cheaper than the boss. No hiss. One of the best things I've bought in years, sounds great and build quality is excellent.
I am very late to this party as always,but I just got a "like new" GE-7 yesterday and its got some noise..I haven't got to crank up the volume on my rig yet,but thats tomorrow.
If it has excessive noise I will do the 3 chip replacement and go from there...should be just fine..instead of sending it off and pay who knows how much..
Great Job Here !
Thanks man!
This is really old by now but there is some good advice in here for these older analog through hole boards. The TL022 ICs can be replaced with 062, 072, or 082s if you can't find others. As a general rule the higher you go the quite, but may draw more current. In fact they can replaced with any pin compatible dual op amp. I notice Tantalum caps can sound differnt in a EQ path and so long as they test good, that the values have not drifted, I'd leave them. Ceramics can be nosier in the audio path and a good candidate for using metal film\poly(film) or even mica for pF values. 🍻
great mod. good job Adam.
Thanks dude!
Great job man!
Thank you, good sir!
Thanks great video.. only doing the 3 chip swap to reduce noise hope its enough..👍🏽
Yes, it should be fine. Cheers!
wow! To reduce the noise I just need to change 3 chips? :-O I want that! I had two GE-7 Pedals and sold them because of the hiss, no i am hoping to get a GE-7 and mod it.
Thanks!
Sweet! Thank you.
+Daniel Ortiz Cheers, friend.
Thanks for sharing, I will try to mod mine!
Good luck with it!
I love this video. Best one for years.
Where do you purchase your small electric parts from? Anywhere online?
Most of the parts I order are from Tayda Electronics, with harder to find parts coming from Small Bear Electronics.
@@gasolinechlorine thanks agains!
My next question would be what is the difference between DIP IC sockets vs machined tooled IC sockets? Is it just cost or is it compatible?
Thank you in advance.
@@ezzye5 Mostly cost. They'll both function. The machine tooled ones are generally easier to use, especially if you're building pedals on stripboard, but it really doesn't matter.
Thanks dude
Great video, thank you! can I just use any kind of sockets?
+peavey2 I used 8 pin DIP sockets. You can use strip sockets (4 per side) if you like, but I find the 8 pin sockets the easiest.
Should this mod work with the vintage GE7s that use the 12V PSU? I installed sockets for the ICs and tried a few NE5532s and the LED never lit up. It'll still work like normal if I throw the old op amps back in. From what I've read the 12V psu is dropped down to 9V so I'd assume the new op amp rails are still receiving the correct power.
I haven't seen a schematic so I can't say for sure whether the power is dropped. It's weird that it's causing the LED to go out though... Definitely something going on there.
Great instructional video! However i have a minor problem here, i somehow managed to disconnected the grey wire that attached on P4 on the PCB, the pedal now doesn't starts and i have no idea where it should be connected to. Would you kindly shed some light on this?
Hey man sorry for the late reply.
On mine, the grey wire from P4 connects to the input jack. Same lug as a darker grey wire (but not the same lug as the black wire.) Hope that helps!
Wow thanks dude, never expected will get a reply on this on vid, yes a few moment after i sent this question i found a solution, by reconnecting it back to the input ground and the pedal worked just fine
@@freezaxp Awesome man, glad you worked it out!
Now i have another problem, i have mod my ds2 with wampler mod, based on your another video, put everything as listed and the pedal works, but the output is VERY weak when distortion activated 😅
I Have a GEB 7, and the chips are JRC 14558D. Can you recommend me better ones to replace them with? Great video BTW, thanks!
Any of the ones I listed in the description should work fine.
Adam thanks brother! I'm ordering some right now :D
I made this mod to old made in Taiwan version and it worked really well. Now did the same to old made in Japan one and something is wrong. The sound is muffled even if the pedal is off or on. Could it be that these components are not suitable for older japanese ones of there is some other problem?
It's hard to say. Maybe the older japanese ones had different chips that aren't pin-for-pin compatible? Otherwise, all you can really do is check your soldering and make sure no tracks got broken, and no bridges happened. Good luck man.
Another question if you don't mind answering. About the capacitors you swapped in, what are they values base on? Were they of the same value as the previous ones just in different models? Or did you increase/decrease the values?
I think I should reiterate: This is not my mod, I found this online, and decided to do a video for it. Having said that, I *think* they're the same values, just better quality parts, but don't quote me on that.
Adam cool, thanks. My pedal is busted anyways so I guess it's worth a shot. But I'll begin with the ics only for now
I double checked, one of the caps is slightly off from the original value, but all the other caps are identical, just different materials. I'm assuming those are also to help reduce the noise from the eq bands.
Adam makes sense. Better quality without affecting functionality since they are pretty much the same value. Thanks for taking your time to help me!
No worries. Good luck.
Please, I wanted to modify my Boss pedals so when I connect my pedalboard to the power, they always come in the on position, without losing the function on and off. When I call them they always come off and I have to start one by one.
I already got a modified pedal where the handmaker made this change, but I have no idea how it was
Would you have any idea what to do?
Sorry man, I'm the wrong person to ask that. I'm not educated enough about this to know how to do that.
Just leave it plugged in. Problem solved
Excelent Job!. Does it works with GEB 7 too?
I don't know if the cap changes work with the GEB7, but I'm pretty sure the idea of changing the IC's to lower noise ones works. Use your own discretion.
Amazing tutorial mate! I only found NE5532P ( 38 mA if that helps ) not the NE5532.. does that matter?
No it shouldn't matter. The important part is the NE5532 bit.
Thank you!! :) subbed.
Thanks dude, appreciate it!
If you do this mod is it just to make the pedal less hissier or will also fiddle with the range of eq?
Most of the cap changes are the same values, just different/better materials. So it won't fiddle much with the eq range, just the noise.
Hi, do you know if this mod be done on a MXR 10 band eq pedal. Thanks
I can't say for sure. I've never seen the inside of an MXR.
bzdura,
Why do 50% of ge7 owners say they get no hiss? On my pedal I only have to nudge down any of the faders 1 dB before the noise gets out of control..... anyways, thanks for tutorial I ordered the IC’s. Hope I don’t screw it up. I am going to try without sockets because too lazy to make another order.
Good luck man. Just make sure you don't heat the IC's too long and you should be fine. Alternate legs to keep the heat away from one spot.
Thanks mate, great advice... hey I don’t know if you do electronics as a job or anything but my pc blew out like 3hard drives, my blu ray drive and external sound card in 1 hit and after hunting about on the internet I am leaning towards hopefully it’s some TVS diodes that have blown, I can snipe them out to get power back into them apparently? Only problem is after taking all the covers off of them I don’t really know what I can snip away to try it out? Do you know anything about this? And if you do would you be interested in my sending you some money for each drive you can help me locate the diodes on? If it’s an impossible job then I completely understand but would love to get all my gear back, I lost like 500+£ worth of gear in 1 go! Cheers ! Looking forward to trying out this boss pedal though I have some tracking I would like to get on with, with no hiss
Sorry I can't help you with that. I just do this for a hobby, I really don't have any electronic experience besides that.
Absolutely no worries! Really appreciate you letting me know. Thank you!
How can you burn the chip, by overheating it with the iron ?
Yeah. It can take surprisingly little to damage a chip if you're not careful.
Hi Adam!i know this is an old vid,but i've just find it and i have a question!wanted to do this mod with my Ge-7 but when i opened out i'v found actually 4 chips insted of 3!1 jrc 4558DD,and 3 IR9022079ZB!so i just have no idea what to do now with this mod!i hope u can help with this old post....Chears
Hey man. I'm not familiar with a GE-7 with 4 chips. It sounds to me like you would want to change the three IR chips for noise, as the 4558 isn't that bad. However, don't take my word for it, you're gonna have to research a bit and make sure. Good luck with it dude!
@@gasolinechlorine thank u sir!just find out that i'll have to change that first 3!now i'm fighting to find a solution to desoldering the old ones😂
I like this,u think it's just a soldering thing but actually desoldering something like this is pretty f...ing difficult
@@jimyjoegingerale Desoldering is much easier with the proper tools. Look for a desoldering pump and/or desoldering braid. They will make your life so much easier.
If I only swop the IC it would kill the noise?
+Rubens Bernardo de Souza Neto Yes, if you just swap the ICs, most of the noise should be gone. The cap changes just make it a bit more Hi-Fi.
Why change the cap values though?
I believe that the cap values are changed so they're higher quality, rather than different values, which should also help a little bit with the noise.
Do u think thisll work for the Behringer EQ 700?
I can't say for sure, but if I had one, and I saw 3 chips inside, I'd probably try it. But that's me.
@@gasolinechlorine so it's only the three chips that are really important?
@@boimesa8190 Yes, that's the important part of this mod.
How much it will cost if hi do it myself?
Shouldn't be very expensive. Depends on where you get your parts from really. But all in should be less than 10 bucks - unless you're going for expensive chips.
I usually sell him drugs but today I’m repairing his pedal for him. This poor sap has a day job and no electrical engineering expertise! What can I say, I try to help out my community where I can.
Cute.
Congrats on installing fake OP2134's. Most sold online are counterfeit. You can tell because yours are squared with no recessed notch at the end
Fake or no, they still fixed the noise.