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Title: Lead dress Non HRM with filaments at back of chassis Post by: erwin_ve on October 17, 2008, 03:53:41 PM This year I bought an ots(non-HRM).
It was an april model, so I did all the Zucker/Learner/Ayan mods. I was fairly happy with the sound but I knew it could be better, based on several clone soundclips I heared with the same specs. I did 3 things that made a big difference in sound; 1. the bass cap is .0012uF; I changed it to .001uF: more detailed bass reponse. 2. Adding 2 parralel 47uF filter caps to the existing 100uF filter caps makes the onstage volume bass reponse more lively. 3. Last and most important: In original dumbles the filament wires are floating from one tube socket to another. Lead dress is done according to that method. In Ots the filaments are located against the back of the chassis I didnt want to solder the filament wires again because getting those filaments back again is a pain in the ***! So I decided to experiment with the wires coming from the pre amp tubes. Especcially the wire coming from pin 3(cathode). In original Ots from factory this wire is follwing the dumble layout, but also sitting on the filament wire. When putting the cathode(pin 3) wire floating 1 cm above the filament wire, on both V1 and v2, there is a massive change in sound. The overdrive seems to be the most affected. It has a really thick tone now and less fragmented. At first, I thought I auto-suggested it. So I put the cathode wires back,sitting on the filament wires. But there was again that fragmented lead tone. It's just unbelievable that such a funny little thing is making such a big difference. Bandmates and even my wife noticed the difference. Hoping you OTS owners can benefit from it ;D Greetings Erwin Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: bobgoblin on October 17, 2008, 04:18:01 PM how about some pics detailing exactly what was done?
Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: hywelg on October 17, 2008, 06:20:41 PM how about some pics detailing exactly what was done? Second that Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: mcinku on October 19, 2008, 07:04:27 PM Subscribed for the pics
;) Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: erwin_ve on October 20, 2008, 06:28:31 PM Picture caps1:The filter caps, the same as Dr.Ika in this topic http://ceriatoneforum.com/index.php?topic=740.msg5712#msg5712 (http://ceriatoneforum.com/index.php?topic=740.msg5712#msg5712), but I had radial caps and made a little cicuit board for it. Axial caps are easier. Right the bass cap across the bass pot
Picture V1;Pre amp tube 1, bad photo sorry! Picture v2: Pre amp tube 2, exactly the same thing. Keep distance between heater wire and cathode wire. Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: mcinku on October 20, 2008, 06:49:23 PM Thanks
;) Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: Mitch on November 08, 2008, 06:17:17 PM I was extremely skeptical about this- but I had to open up my OTS to tighten the rear speaker jacks so I thought, 'what the hell' & moved the filament cables as suggested, and I could detect an improvement in the overdrive tones- less fizz & more articulation- very subtle but ti is there. Anyone else try this?
Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: mcinku on November 08, 2008, 06:57:12 PM I'm still waiting for my filter caps and when I get those, I will open my amp to do this.
I just ordered another amp from Nik and caps are coming in the same box. ;) Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: hywelg on November 08, 2008, 08:46:26 PM I was extremely skeptical about this- but I had to open up my OTS to tighten the rear speaker jacks so I thought, 'what the hell' & moved the filament cables as suggested, and I could detect an improvement in the overdrive tones- less fizz & more articulation- very subtle but ti is there. Anyone else try this? Yes I did it, but I also did Dr Ika's V1 andV2 mods at thesame time so I was expecting to hear a difference and I did! OD much smoother, think the clean is bigger, will know more when I get a chance to wind it up at the rehearsal room next week. Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: erwin_ve on November 09, 2008, 01:47:39 PM I was extremely skeptical about this- I understand most of this skeptisism. But if you think about it; conductors and magnetic fields are worst enemies in a amp. Glad you noticed any difference. When you get it at bandvolume the difference is even bigger. Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: Mitch on November 09, 2008, 09:37:01 PM I was extremely skeptical about this- I understand most of this skeptisism. But if you think about it; conductors and magnetic fields are worst enemies in a amp. Glad you noticed any difference. When you get it at bandvolume the difference is even bigger. You're right- I just got back from a local gig- small venue but I had the OTS wound up to around halfway- much better- bottom end much beefier & distortion is now as smooth as molasses- fabulous! I even had one of the team from GigRig comment on how good my tone was- and for those guys their business is TONE! check 'em out... http://www.thegigrig.com/ Mucho thanks for the easiest mod ever erwin! Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: herby660 on January 16, 2009, 09:30:45 PM I was extremely skeptical about this- I understand most of this skeptisism. But if you think about it; conductors and magnetic fields are worst enemies in a amp. Glad you noticed any difference. When you get it at bandvolume the difference is even bigger. Erwin.....Your are a star....it makes alot of difference ...I am very grateful to you regards Richard Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: hywelg on January 16, 2009, 11:17:57 PM I even had one of the team from GigRig comment on how good my tone was- and for those guys their business is TONE! Kudos indeed, I've seen some of their videos. Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: erwin_ve on January 17, 2009, 01:13:15 PM I was extremely skeptical about this- I understand most of this skeptisism. But if you think about it; conductors and magnetic fields are worst enemies in a amp. Glad you noticed any difference. When you get it at bandvolume the difference is even bigger. Erwin.....Your are a star....it makes alot of difference ...I am very grateful to you regards Richard Too much honour :) Enjoy that big fat massive tone now... Look at Dumble pictures and Fender filament wiring. They were the smart guys. However I hope Ceriatone is gonna change there method of filament wiring. Floating from one tube to another is the way to go in building the d-style amp IMHO. Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: Jimmyd on January 25, 2009, 12:30:31 PM Look at Dumble pictures and Fender filament wiring. They were the smart guys. However I hope Ceriatone is gonna change there method of filament wiring. Floating from one tube to another is the way to go in building the d-style amp IMHO. A friend is constructing his S&M OTS right now and intends to use the Fender filament wiring method. We're anxious to hear his amp against my Ayan/Lerner/Zucker beast. He also has the Fender choke to substitute in one day. Yo Pete, you reading this? The Hermida cab looks good in my living room! ;-) Jim Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: herby660 on January 26, 2009, 11:23:36 AM I was extremely skeptical about this- I understand most of this skeptisism. But if you think about it; conductors and magnetic fields are worst enemies in a amp. Glad you noticed any difference. When you get it at bandvolume the difference is even bigger. No Erwin you are a star for pointing this out to us all with pics as well. I spoke to Nik about it and he is aware of it too. This I believe is the secret ingredient as well as ensuring your cathode and anode (plate) wires are parallel . This is the dumble special lead dress and it works. It made such a difference with the OD trimmer set at 26K to ground (middle lug and outer lug) Right if you are looking at the black side This is 9 oclock on some trimmers and 11 oclock on mine. My trimmer reads 85K overall. This is important as I have unleashed tones I didn't think the amp was capable of. I was thinking of selling it but did all the similar mods to Jack but used RN65's for both anode and cathode resisters. I now have the tone in my head. TAD 6L6 WGC short bottles are ace by the way. Erwin.....Your are a star....it makes alot of difference ...I am very grateful to you regards Richard Too much honour :) Enjoy that big fat massive tone now... Look at Dumble pictures and Fender filament wiring. They were the smart guys. However I hope Ceriatone is gonna change there method of filament wiring. Floating from one tube to another is the way to go in building the d-style amp IMHO. Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: erwin_ve on January 26, 2009, 12:17:58 PM No Erwin you are a star for pointing this out to us all with pics as well. I spoke to Nik about it and he is aware of it too. This I believe is the secret ingredient as well as ensuring your cathode and anode (plate) wires are parallel . This is the dumble special lead dress and it works. It made such a difference with the OD trimmer set at 26K to ground (middle lug and outer lug) Right if you are looking at the black side This is 9 oclock on some trimmers and 11 oclock on mine. My trimmer reads 85K overall. This is important as I have unleashed tones I didn't think the amp was capable of. I was thinking of selling it but did all the similar mods to Jack but used RN65's for both anode and cathode resisters. I now have the tone in my head. TAD 6L6 WGC short bottles are ace by the way. regards Richard Hi Richard, Anyway thnx! It' s de-mystifiying the lead-dress thing. Dumbles and Trainwrecks( as I heard) are the most unstable amps when it comes to wiring. You're spot on right with the cathode and plate wires, ceriatone is already doing a good job there! Grtz Erwin Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: hans on August 10, 2009, 01:07:50 PM I can't see the pictures,can anyone mail them to me?
or post again,THANKS! Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: erwin_ve on August 12, 2009, 09:07:14 AM I can't see the pictures,can anyone mail them to me? Pics are up again!or post again,THANKS! Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: whoapiglet on March 17, 2010, 03:56:39 PM Hi-
A question for Erwin- I have an HRM, from 2009. is the implementation of the lead dress changes the same as in a non-HRM? Does Nik do the changes stock now? Thanks Ed Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: erwin_ve on March 17, 2010, 05:43:33 PM Yes HRM is the same n lead dress. I don't know if Ceriatone has changed it. Better ask Nik.
Title: Re: Lead dress Non HRM with filaments at back of chassis Post by: whoapiglet on March 17, 2010, 06:23:14 PM thanks erwin!
I'll look inside and give it a try. love the amp BTW, just wanna make sure its all it can be. Ed |