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Post by pinot on Feb 6, 2012 10:34:46 GMT
Hi,
is this product yet available? Is it something similar as the Gemini III as a bass-cut for that vintage sound?
Kind regards Pinot
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Post by Charlie Hall on Feb 6, 2012 11:43:06 GMT
Hi Pinot,
The Cutting Edge was available but they were all sold a number of years ago. I no longer make them. The Gemini III is a very similar effect so I suggest that instead. Both units cut the bass.
Regards,
Charlie
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Post by grip on Feb 6, 2012 13:12:57 GMT
Hi Pinot, If you are OK with a soldering iron, Charlie put his design open for use some time ago, I made one - and if I can I'm sure most can as I'm pretty useless with a soldering iron. There is a very good picture of the circuit on a stripboard that Rogercook posted some time ago, the link to his original picture is dead now, so I have uploaded it to 4 shared along with a detailed parts list (part numbers for Maplins Electronics) and Charlie's circuit diagram in a zip file: www.4shared.com/file/l0B8x_dY/Cutting_Edge.htmlKind regards, Chris |
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Post by shadfan4 on Feb 6, 2012 14:09:07 GMT
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Post by Gary mac on Feb 6, 2012 18:30:01 GMT
Hi guys
Failing that i have one for sale on the well known auction site the item number is 170775948356 just in case you want one of charlies ones lol.
Regards
Gary
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Post by pinot on Feb 7, 2012 9:45:47 GMT
Hi all,
thank you for all that informations. I decided to order the Gemini III and the Black Finger, in both cases is 30 days send back if I am not satisfied, but I am very optimistic after all I read here and elsewhere.
I am afraid of the day my Q+ will die and Charlies new unit is not available. The TVS should be a good unit, but too expensive for hobby use, sorry that Charlie don't consider the Eventide Eclipse. But I hope his unit will come soon and will not be too expensive.
Kind regards Pinot
(I posted this reply twice because of 2 similar threads, I wanted to thank all of you)
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Post by fenderulike on Feb 7, 2012 16:30:40 GMT
Hi Chris
Thankyou for the information about Charlie's Cutting Edge Pedal. I have downloaded everything from 4shared and bought all the components today and am looking forward to the challenge.
I know absolutely nothing about electronics so I am glad of the picture of the circuit on a stripboard. I just need to check one thing though. Do the red crosses denote where the strip should be cut?
Sorry to ask such a basic question but I just need to be sure before I start blundering in!
Regards, Robin.
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Post by grip on Feb 7, 2012 18:36:51 GMT
Hi Robin, I just need to check one thing though. Do the red crosses denote where the strip should be cut?
Regards, Robin. Yes, the red crosses are where the strip is to be cut. I hope all goes well with your project  Kind regards, Chris |
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Post by harley on Feb 7, 2012 22:28:21 GMT
Hi Guys
I have built the cutting edge circuit into two of my strats on the back of a mini toggle switch. easy to do and at your fingertips as and when you need it. plenty of cheap replacement scratchplates on the well known auction site if you are wary of drilling holes in yours
regards
Ian
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Post by marvingers on Feb 7, 2012 22:51:56 GMT
Hi!
The Cutting edge shall be used between the echo and the amp.
Guitar-Echo-Cutting Edge-Amp
Best regards!
Lars G. Vinger
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Post by fenderulike on Feb 8, 2012 17:16:29 GMT
Hi Chris
Thanks for your prompt reply re cutting the stripboard.
I have had an enjoyable day assembling the pedal but unfortunately it doesn't work! I've checked the switch, the sockets, the connections, the wiring diagram and I hooked it up guitar-echo-pedal-amp ( thanks Lars) but there was total silence.
Is there a right and wrong way to fit resistors and capacitors???
Oh well, I've had a pleasant day and improved my poor soldering skills along the way so it wasn't a complete waste!
Kind regards,
Robin.
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Post by Rick on Feb 8, 2012 17:48:31 GMT
........... That is a really good question Robin. I would also be interested to know about the right or wrong way to fit resistors and caps. Best wishes. Rick.
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Post by marvingers on Feb 8, 2012 18:47:05 GMT
Hi! Here is my pedal, the first model made by Charlie. Guitar to input Echo, Output echo to Input Cutting Edge, Output Cutting Edge to Input Amp Best regards! Lars G. Vinger Attachments:
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Post by rogercook on Feb 8, 2012 19:30:28 GMT
Hi Robin
Sorry to hear the Cutting Edge doesn't work.
As you have total silence there must be a problem with the construction. If you can post a photo of the internals it may be possible to offer some suggestions, but for now, the first thing I would check for is any short circuits (possibly odd bits of wire or solder on the stripboard or switch terminals) and then check how the input and output sockets are wired. If you have the sockets with 4 terminals, these will be switched types, and if you have connected to the wrong side of the switched contacts no signal will get in or out of the pedal (it's easily done)! The terminals to connect to are the ones that remain in contact with the jack plug when inserted.
Some capacitors have to be connected a specific way round, but not these. Resistors can be connected either way round.
Roger
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Post by fenderulike on Feb 8, 2012 19:49:06 GMT
Hi Roger
Thankyou for your help. I think you may have identified the problem. I'll go through it again tomorrow and let you know if I've sorted it.
Kind regards
Robin
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Post by marvingers on Feb 8, 2012 22:56:57 GMT
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Post by Charlie Hall on Feb 9, 2012 10:31:22 GMT
Lars is trying to tactfully say that the unit should go between the echo and the amp, in other words, it is a bad idea to put it inside the guitar!
Regards,
Charlie
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Post by pinot on Feb 9, 2012 14:37:36 GMT
Hi,
I am totally confused now, Charlie as the builder of the "Cutting Edge" Pedal" says that the unit should go between the echo and the amp, David as the builder of the Gemini III recommends strongly that it should be the first after the guitar and before the echo?
Kind regards Pinot
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Post by Charlie Hall on Feb 9, 2012 14:46:42 GMT
Hi Pinot,
It is because the Cutting Edge is a passive circuit (needs no batteries or power) that it matches best when used as recommended.
If you connect the Cutting Edge as the first device from the guitar, the guitar will sound dull because the impedance matching is not optimal.
Although the Gemini III can be placed wherever you want, which of course also means the recommended use works fine, I do in fact use my Gemini III between the echo unit and the amp. To me, that is the closest way to get the response of the bass cut setting (brilliance) of the old Vox amps, by having the bass cut effect closest to the amp.
Regards,
Charlie
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Post by marvingers on Feb 9, 2012 14:59:17 GMT
Hi!
I´m using the Cutting Edge a lot and think it´s fantastic. In the soundfile section you can listen to the difference when the filter is on and off.
The name of the soundfile is
Lars G. Vinger (The MARVINGERS)-Medley
I´m using the Cutting Edge for all tunes except for tune number 3. The sound is fatter on that one. I´m using bridge pickup for every tune.
Best regards!
Lars G. Vinger
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Post by fenderulike on Feb 9, 2012 16:42:58 GMT
Hi Roger,
You were right! I'd wired the output socket on the wrong side and now the signal goes straight through. Unfortunately it does just that, there is no change in tone as far I can tell.
The foot switch is extremely noisy and the amp clicks/thumps when it's pressed. Is that the sign of a cheap or faulty component I wonder?
I've seen a post by Charlie on 25/4/09 where he says it's possible to wire the circuit literally as it is his diagram. So I'm now wondering why cuts in the stripbpoard are necessary?
Help, I'm becoming a tad confused. In the meantime I will make sure nothing is touching where it shouldn't although if there was I would have thought there would either be a noise or no sound at all.
Kind Regards,
Robin.
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Post by fenderulike on Feb 9, 2012 18:01:24 GMT
Roger
I missed the word "in" out in my reply so it should say "as it is in his diagram".
Robin.
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Post by rogercook on Feb 9, 2012 18:19:43 GMT
Hi Robin Not sure what the problem is here! The cuts in the copper strips are necessary as without them the capacitors would be simply all connected together on both sides. If you look at Charlie's circuit and the stripboard layout the signal enters via the 47nF cap (slightly confusingly on the stripboard it's the one nearest the output socket) and you should have a chain of caps in series that the signal flows along. I've added some arrows (colour coded the same as the wiring colours on the layout diag) that show the signal path from input socket via switch the to the stripboard and again via the switch to the output.  You could omit the switch altogether and just wire the input socket to the grey wire and the output socket to the green wire to check if the board is working. You may find the effect quite subtle Roger |
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Post by fenderulike on Feb 9, 2012 19:24:09 GMT
Hi Roger,
Thanks for that. I will slowly digest your diagram tomorrow. I think am going to understand more using that. I will go over everything again first, then try it without the switch. It may well be that my ears are not tuned to "subtle"!!!
Thankyou for your patience.
Kind regards,
Robin.
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Post by rogercook on Feb 9, 2012 20:00:05 GMT
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Post by odball on Feb 9, 2012 22:34:57 GMT
hi this is really interesting, all ways fancied having a go at building something like this so will have a go,what i wanted to know is could a 9 volt battery be added some how so it would be more like the Gemini 111 so it can just go in between guitar and amp.
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Post by rogercook on Feb 9, 2012 22:50:57 GMT
Hi Odball You need a bit more than just a 9v battery to make it like a Gemini  . You would need to install a buffer stage at the input which is in effect a small guitar preamp. I had intended to try this approach with mine but have never got round to it. I simply used it after my Magicstomp and I now have an EF86 channel in my amp that makes it a bit superfluous. Good luck with it Roger |
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Post by DaveC on Feb 10, 2012 0:50:48 GMT
I built one of these circuits (no casing or switch) and, at Charlie's suggestion, used it between my MagicStomp and the Normal input on my AC30/6TB. It works extremely well.
I then built another one and (with a bit of lateral thinking) rearranged the position of the components on the stripboard to reduce the size to under a half. I then fitted this into my guitar and positioned the DPDT switch on the trem-spring cover-plate. The pickups are Kinman 54 Impersonators and I have to say that, despite any impedence mismatch, I'm very impressed with the sound as long as the tone is full On.
Regards
DaveC
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Post by rogercook on Feb 10, 2012 8:51:52 GMT
Hi Dave
When I tried mine directly connected to the guitar it definitely took the edge off the high end and so rather defeated the purpose. I imagine it would work well with active guitar circuitry. There are a few active modules available that fit inside the control cavity. I haven't tested any though.
Roger
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Post by DaveC on Feb 10, 2012 12:41:48 GMT
Hi Roger,
Yes, I definitely need the treble full ON (guitar and amp) but the result is pretty good.
In the 70s I had a small pre-amp (by Chandler Guitars) fitted to a Peavey T60 and that transformed what was already a good sound.
I think I feel an ultimate Strat wiring set-up coming on .
Regards
DaveC
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. You would need to install a buffer stage at the input which is in effect a small guitar preamp. I had intended to try this approach with mine but have never got round to it. I simply used it after my Magicstomp and I now have an EF86 channel in my amp that makes it a bit superfluous.