What makes Dumble style amp sound better?

[Tubetastic]

PS: Most women seem to be more attracted to the black dog than to me.

You must be way too seasoned.

[martin manning]

PS: Most women seem to be more attracted to the black dog than to me.

You must be way too seasoned.

That can't be it- the dog and I are exactly the same age!

[talbany]

Martin, I understood your post completely. I guess my joke wasn't really that funny. Notice how Tony spelled your name.

Sorry "MARTIN"

[cxx]

It might seem more plausible that the heat and vibration would affect the orientation/alignment of the laminations by softening the varnish rather than changing the characteristics of the metal. That's what it appears to look like in old transformers. I haven't heard much humming coming from an output transformer. Seems like something would be broken if you did.

On the other hand, I had heard that, in the early years, Ford would season engine blocks by letting them sit outside for a long time before machining them. I think they stopped that once they got better at casting (which is a pretty good combination of science and art). Most laminations are stamped so it might not be relevant.

I'm a little skeptical about MM's public comments on transformers, regardless of their technical knowledge. They are selling the magic.

[Kassie]

lately I have been contemplating about experimenting with 'proven' magic transformers such as 'Lundahl'. Raving in the HIFI community, best thing since sliced bread. Very different looking from the outside though. It might be cool to start off with an SSS type.

Such a transformer has many benefits, they offer standard models which you can wire yourself for different primary and secondary impedances. You really can use it as an experimentation aid.. for instance upping the primary if it sounds too sterile.

Would it be a proper clone? No, but it could be different/better? All you know is you have a top draw transformer so that leaves you with possible circuit changes to dial in the sound.

And offcourse leave the Mercury bimbo talk where it's at.

[groovtubin]

I know it is a very broad question, but I just finished building Ceriatone version of ODS and can not get enough of the tone that ooooses out of it. I began to wonder, I have Fender Jr amp (the green PCB one) and 1958 Magnatone troubadour that I restored. They sound nice but smaller, less dimetional, if you would... not as juicy and creamy... What is it? Bigger transformers? Just more wattage (mine is 100W)? People will be asking me, so I am looking for some kind of answer, if any of you could help...
Thanks.

I`m tweakin a 80`s version, here`s my .o2c

the clean channel sounds like a 800 watt bass amp w/the BEST BF tone imaginable, it is so HUGE n ridiculous, it`s hard ta blv at first..There`s a guy who owns several dumbles a chinese fellow, ( Chris Singh) he NAILED it when he said most CLONES he had played sounded SMALL compared to real dumbles! If it don`t knock you down, something is wrong! ANd i hope your`s IS!!

jim@OA

[Luddy]

I am interested in reading your dissertation. Can you please post it? Thanks.

No, I cannot post it. The copyright is owned by the University of California.

If you're serious and not just trolling, PM me, and I'll provide you the titles of journal articles that I've published, that were based on my Ph.D. dissertation.

Just an idle question, does your university have theses online now? My students now turn in files instead of paper-based theses. Previously, scholars could purchase theses from U of Michigan Microfilms. It's too bad that someone can't access a particular thesis, such as yours.

These things evolve, though. I remember a lot of drama at the University of Chicago, where my PhD diss in music composition was a 15-minute CD of electronic music. The faculty senate (I think that was the entity) had a special meeting in which they allowed my diss to be submitted electronically. Nowadays, electronic theses are standard.

[Zippy]

Just an idle question, does your university have theses online now? My students now turn in files instead of paper-based theses. Previously, scholars could purchase theses from U of Michigan Microfilms. It's too bad that someone can't access a particular thesis, such as yours.

These things evolve, though. I remember a lot of drama at the University of Chicago, where my PhD diss in music composition was a 15-minute CD of electronic music. The faculty senate (I think that was the entity) had a special meeting in which they allowed my diss to be submitted electronically. Nowadays, electronic theses are standard.

I'm confident that current submissions are posted - or at least available upon request. Mine was stored on microfiche, as I recall. I still remember printing my dissertation in the wee hours of the morning and rushing across town to make enough copies to meet the submission requirements. I believe it is available upon request with some printing fee. My prof was wise enough to encourage me to extract several publications from my dissertation. Those are readily available to scientists within the community with access to the major journals.