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Ceriatone / Overtone / Re: overtone
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on: March 01, 2013, 06:51:59 PM
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Very Nice! you're gonna love it!
Gregg
Thanks plastic..as an aside how did you get name Ha ha, not laughing at you but me it is sort of a tongue twister. Don't know if you were referring to amp but assume you were. The guitar in combination with this amp ought to be awesome. I have wanted a thin line for a while and though I haet to admit it..Gary Clark Jr. plays the shiite out of one at stage volume and it sounds Terrific. Clean for Jazz.. I post here when I get it all back. Thanks for the suggestions and help. I wish I could help but my knowledge of electronics is limited |
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Ceriatone / Overtone / Re: overtone
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on: February 28, 2013, 09:13:14 PM
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The OTS is being workd on in San Jose by Bill Dunham ( Segao Amps). It is being set up as a Robben Ford 102 and will have a baseman transformer The heater wires are lifted..Thanks Hywelg for the tip. I should get it next week. I run two winged c 6ld gc's in the power side and three telefunken 12ax7's in the preamp.
I am excited I have not heard a real decent overdrive sounds yet.
The icing on the cake is that I am buying a new guitar, an epiphone casino thin line hollow body. None od this is here yet but will be soon and it is red woot!!.
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Ceriatone / Overtone / Re: overtone
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on: February 14, 2013, 10:52:15 PM
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I understand, for me this ampbuilding thing is a hobby. Bill has made a career out of it and I believe he's even spent some time with real Dumbles so I am sure you will be in good hands. BTW got the pics and no problem going over them. I was an electronics/fire alarm systems service tech for 10 years before I changed careers a little over 2 years ago so troubleshooting electronics is fun for me.
Anyways hope to here from you once you get the bugs worked out in that amp
Todd
Sent amp to Bill at Sebago sound will report back when I get the amp back. I have so much noise now anything will be an improvement. Heater wires will be lifted for one thing. It will be a bit before I get it back. Bdog aka wbfree |
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Ceriatone / Overtone / Re: overtone
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on: February 12, 2013, 02:21:36 AM
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Sure thing,
Yeah on the other pics you sent me I noticed some other strange components that to be honest I dont know what the tech was trying to achieve by installing. If I had that amp on the bench I would go through it and revert it back to the original OTS 124 specs to start.
Why did the tech make all these mods? Other than the PT blowing were you unhappy with the sound prior to it blowing?
Todd
I wasn't hearing what I wanted to hear I had no good tone in the overdrive. I know so little about how to achieve what I want, so I depend on others to do mods and I really should go to someone who understands these amps. I don't know what you do but if I had known that you work on Dumbles I would have called you. As it is I plan on seeing you when I get it back from Bill and I thank you for spending the time you have to try and figure it out. You are not that far away. I sent more pictures so let me know if you got them. |
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Ceriatone / Overtone / Re: overtone
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on: February 11, 2013, 06:51:05 PM
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Hey Bdog
I sent you a PM with my email!
I've been looking at the second picture you posted and it appears it is something between the OTS and the OTS SM50.
There are a few suspect components for example the 2 large orange drop caps on the far right ( input side ) are 715p caps rather than 6PS I cannot see the value of each cap from the pic but they appear to be the same size and they shouldnt. There is what looks like a tantalum capacitor paralleled across a resistor towards the bottom middle of the board that has no place on any D-style amp so that one has me scratchin my head.
I'll have to go back to your previous posts but did you buy this amp new from Nik in 2008
Todd
[/quote
Yea I did get it nw in 2008 and then I smoked a transformer and sent it to a listed repair man. He modded it but I don't know everything he did. I will try to get my phone fixed so i can send pics. But what ever happens I will stay i touch and thanks for the effort and trying to figure this out. I have some really old 6l6 tubes frm my silvertone amp I would like to try but that will have to wait to do.
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Ceriatone / Overtone / Re: overtone
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on: February 11, 2013, 06:16:56 AM
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Hey Bdog
I sent you a PM with my email!
I've been looking at the second picture you posted and it appears it is something between the OTS and the OTS SM50.
There are a few suspect components for example the 2 large orange drop caps on the far right ( input side ) are 715p caps rather than 6PS I cannot see the value of each cap from the pic but they appear to be the same size and they shouldnt. There is what looks like a tantalum capacitor paralleled across a resistor towards the bottom middle of the board that has no place on any D-style amp so that one has me scratchin my head.
I'll have to go back to your previous posts but did you buy this amp new from Nik in 2008
Todd
?My computer won't let me sens a thing it keeps coming back to me. don't know what is going on. I give up for tonight. But thanks Todd. It ccomes back using he secoumd emiail withe 9 in it  ?? |
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Ceriatone / Overtone / Re: overtone
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on: February 10, 2013, 03:38:26 AM
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It would work better forwarding these through email if our are willing to do that.
Bdog
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Ceriatone / Overtone / Re: overtone
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on: February 09, 2013, 08:21:50 PM
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Yup that's it!!! Very odd that there is such a disparity between the two sets. Have you tried adjusting the pot up and down with the Winged C's in there? Are they both reading 61mv? If they are, and lowering the bias voltage doesn't help i'd say something is off with the tubes, the bias circuit, or the HT circuits somewhere. very strange. i'd try adjusting the bias pot with the winged c's and if that doesn't work try another set and if that doesn't work take her to the tech
Gregg
a I think it is the winged C's can't get the voltage lower than 61 mv when I go to the low limit of what the pot will do. If I set the bias at 40mv on the JJ's the bias on the winged C's gets so hot I have to shut down the amp so methinks it is the tubes. I want to say thanks to all of you for the great advice, wish I could return the favor I will post again after I go to Sebago and get this worked on. I also have new tubes coming. Mr. T Wilcox you are invited for a beer anytime you are in Redding. My ph # 541 480 1726 |
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Ceriatone / Overtone / Re: overtone
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on: February 09, 2013, 07:49:53 AM
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My other question..sorry, is this..I ordered a matched pair of SED winged C 6l6gc's and they won't bias lower than 61 mv. The tubes I am replacing are JJ 6l6gc's and I set the bias way low to see if I was doing something wrong, at 18 mv to be specific, and the SED won't go lower than 61 mv. Are these SED's too hot, am I missing something because quite frankly I am ready to throw this amp in the trash. I have had nothing but bad luck. You guys talk about the great tone..I have no tone clean or OD. I can't turn the 100k OD pot underneath on the circuit board past 8:30 or it just gets too noisy, real noisy Not for nothin, but it sounds like the knob you are turning for the OD trim is actually the Bias pot. the Bias pot usually under the circuit board (the bulk of it) the shaft and knob usually pokes out the bottom. on most dumbles and clones, The OD trim will be a small trimpot basically sitting over V2 and its circuitry with the adjustment slot facing horizontal towards the front or rear of the chassis. There should also be another trimpot over V3 for the PI trim. Agan, this could be the case and having the Bias too low can cause crossover distorion, and too high can make the amp muddy and undefined, and could burn the tubes up, shorting them out and causing your transformer woes as well. Again this is just a theory, and i wouldn't be able to prove it without pics of what ya got. Keep rockin, man! My dad is 72, still works a full time job and rocks as well! Hope this helps! Gregg Hi Gregg Unless I am missing something which is always possible my bias pot is in between my 2 output tubes. I lowered it to 18mv with my JJ 6l6gc's in and then pulled them and put in the winged C's and got a reading of 61mv. Here is a picture of the pot..I hope this is correct. I could be wrong. My amp was made in 2008 so things could change. Bdog And you always help. |
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Ceriatone / Overtone / Re: overtone
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on: February 09, 2013, 12:26:05 AM
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if you are in the Sacramento area ever let me know I would be happy to give your amp a thorough checkup.
Regarding your HRM thread I would suggest you be sure to get this OTS running correctly first before considering another D-style amp. The differences between HRM and non-hrm are more subtle than you may think!
Todd
Hi Todd, I live in Redding right up the raod from SAC where are you located. I have been listening to all the great advice I am getting and have listened to some OTS clips..my amp has never sounded as good but I can now see where it could. I get your point. I was going to have Bill at Sebago amps work om it. I sent him some pictures and he said he could see a bunch of components that need to be replaced and the heater wires raised. Bdog aka Wbfree |
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Ceriatone / Overtone / Re: overtone
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on: February 08, 2013, 10:09:02 PM
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I will be getting another amp either the HRM or the 70's voiced DT50 from Bill..
I wouldn't, unless you play on one for a fair time. It might be that this style of amp isn't for you. The clean can be very revealing of poor technique and, depending how its setup the OD can be really poor for rhythm playing, its intended as a lead channel. I want to thank you again Hywelg. been listening to some sound samples of the OTS and I just need to have some patience because it sounded awesome. I would still be interested in your eq settings and where you have the 100k pot underneath set. I can almost get mine to feedback which is something I want even on the clean channel. It is hard to put in words but the clean feeding back sounds absolutely wonderful. I know I am crazy. Anyway thank you. Quitting smoking really is effecting my mental state right now and I don't always think clearly I want to smoke so badly, so I listened when you said I was going in circles, you are right. I have been chasing tone for a long time and I can tell I am almost there,... to the sounds I hear in my head. Music is the best-FZ |
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Ceriatone / Overtone / Re: overtone
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on: February 08, 2013, 05:54:13 PM
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I will be getting another amp either the HRM or the 70's voiced DT50 from Bill..
I wouldn't, unless you play on one for a fair time. It might be that this style of amp isn't for you. The clean can be very revealing of poor technique and, depending how its setup the OD can be really poor for rhythm playing, its intended as a lead channel. I understand all that, it is making me a better player and a lead channel is what I want, I am not trying to play rhythm on the overdrive. The clean channel is just not quite there yet. I will take it to Bill at Sebago and raise the heater wire and replace some stuff on the board, Just out of curiosity what or how is you amp eq'd. You have the same as me I think an OTS non HRM Thanks for the great feedback Hywelg I appreciate what you are telling me. I wont get hasty about buying another one if I can get the sound I am after which is always at its base a Dumble sound. Sorry to ramble on. I need a starting point that is why I ask you about your EQ. Damn smoking, quitting my little buddies aka cigarettes is really my problem right now ha ha. |
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Ceriatone / Overtone / Re: overtone
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on: February 08, 2013, 11:02:56 AM
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There is nothing fundamentally wrong with your amp, unless someone has thoroughly messed up. If you don't know what might have been modded take it to Sebago Sound and have him tweak it to suit you. To be honest you are going round in circles, but you do need to be able to describe what yours is lacking and what you want from it for Sebago to be able to come up with the goods.
Thanks Hywelg you are probably right, circles. The bias thing is a mystery though, but I will call the tube guy and see what he has to say. I am in contact with Bill at Sebago already. I kind of know what I want the amp to do even if I suck as a guitar player, I have a good ear. Thanks for the input. We have both been around here for awhile so it really is good to see that you are still here as I said before. I will be getting another amp either the HRM or the 70's voiced DT50 from Bill..so I have a rough idea how I want things to sound.This will be the last amp I buy I hope ha ha. |
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to keep the forums alive.