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917
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Ceriatone / Overtone / Re: Overtone biasing
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on: March 21, 2008, 07:46:58 PM
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Thanks for the replies. I haven't had a chance to really play it, other than to know this amp is going to take me awhile to dial in. I like it but don't want to gush until I have actually got the sound I want to hear, but that is for another category. I biased it hot last night. Interesting, the pot to adjust has no slot for a screwdriver so I had to use needle nose pliers..is there a tool I don't know about. Tonight I am going to put some EL34's in it..can't help it I am a tweaker. Mcinku where do you have your OD pot adjusted to, and which side do you read it from to know where say 10:00 is, this may seem like a stupid question but I have to ask. I am pretty sure I got it right just checking. I did not get the gain I wanted, but like I said I did not have a lot of time to play with.
Also have you change that resistor by the trimmer, just trying to get a feel for what makes it be all it can be.
It is definitely a good amp.
So far I didn't touch the amp (except bias thing), I did my homework, so I know what to do, if I want to change something... but before I do that, I must learn what this amp can really do. This is my first D style amp, so there is a learning curve I guess. ...and also, I'm building a combo cab. Until I have this done, it's not smart to mod anything. This cab with the G12-65 will create a certain sound and I'll go from there. I've learned one thing though,... this is the best amp I ever played and I'm so happy about that.   |
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918
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Ceriatone / Overtone / Re: Overtone biasing
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on: March 21, 2008, 07:27:55 AM
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Okay guys, I got it, it's sitting warming up. The amp I had that I could bias had two test points for each tube and a separate pot for each. This has only three, one ground two hot, and one pot. So I assume I adjust each one, I am just a little in the dark. I also am assuming 450 plate volts for now, because I don't fell comfortable measuring that yet. I will take it to my buddies house on Saturday and get him to show me the safe way. For now I just want to hear it I won't run it too hot, my ear is still good even if I am old  Hope someone is up still, would be nice to have this info, what a noobz with teh toobz eh? Congrats !! Yes only one pot... which means you bias both tubes with one pot. With those measure points you can measure how even the tubes are. That's why you have to buy matched pair from now on. |
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922
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Ceriatone / Overtone / Re: Just ordered my Overtone.
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on: March 17, 2008, 10:02:08 AM
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Mine came through Belgium and it took 4 days to arrive from Ceriatone to my country. ...and was shipped on Friday as well.... my point... it won't be long now |
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927
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Ceriatone / Overtone / Re: Overtone biasing
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on: March 15, 2008, 08:01:24 PM
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I measured mine and I have 450V. By using the bias measure points I biased my amp to 42mV. mcinku, what tubes are you using, if 6l6, that is a warm bias(hot?) just curious, still learning, how does it sound. I have some JJ 6l6 gc's and a set of el34(groove tube el34s) that I like. I will try the 6l6's first. Nik sent Tung-sol 6L6GC-STR with my amp and that tube is rated for plate voltage up to 500V and up to 30 watts of power... so if you go here http://www.webervst.com/tubes/calcbias.htm and enter the numbers. At my plate voltage (450V) and at 70% of its maximum allowable plate dissipation the bias can be 46.6mA. So I guess my bias is not to hot. |
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928
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Ceriatone / Overtone / Re: Will the Overtone use 5881 power tube?
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on: March 15, 2008, 07:48:08 PM
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Nik told me the plate voltage was 440 to 450, not disputing you, I just want to know what it really is, should I ask Nik again? The reason for me is I am going to try something I won't mention until I do it, because all of you will think I am crazy, but if it works..Oh Boy. So I need a definitive answer to that. Are you liking your rig now mcinku.
The reason why I said that is cause I measured mine (450V) and the other one, which belongs to my friend had 470V. So if you want to know for sure what your plate voltage is, you will have to measure it.  |
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929
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Ceriatone / Overtone / Re: Manual
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on: March 15, 2008, 07:41:55 PM
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That's not a bad idea I guess. ...there is a lot information on this forum already but to put it all together with the right structure... Not an easy task. Are you willing to do that? If you would start and make a draft of some kind, I can lay a hand. |
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