Dumble Slidewinder?

[Chris G]

Hi Guy's,
I was wondering if any of you had any info on this amp.It supposedly is a moded fender super.any other info out there?
Thanks
Chris

[Frost]

Hey Chris,

Wish I has some infor for you. I've been wondering about this model and the Ultra-Phonix (SP?) for a few years now. See the attachements. The Ultra-Phonix is a Bandmaster mod in the pix below which I got off the net in 2002 or so. Apparently, Dumble stopped building amps a few years ago and just focuses on heavy mods of the aforementioned amps.

Cheers,

Heiko

[Normster]

I love the label!

A Request from Dumble.......
This amplifier has circuits and design features that are unique to this amplifier and were developed exclusively by Alexander Dumble. As a provision, it would be much appreciated if these circuits and design features would be held in the utmost proprietary secrecy. Bootleggers and amp pirates are a disgusting lot. There's no reason to make things easy for them.

Thanks,
Alexander Dumble

That's so much better than the old secrecy contracts. I'm not sure if we're bootleggers or amp pirates.

[Frost]

Hey guys,

I wish I had more photos but those are the only two. I think I got them off either eBay or the Les Paul forum. A few members on the Les Paul forum have some seriously (monetary wise!) amps like Dumble and Trainwrecks.

Take care,

Heiko

[Chris G]

Hi Guy's,
Thank-you for replys,I have mikes new cd and I guess he used this modded amp on a tune or 2,would love to see some gut shots of the phoenix!!!

Thanks
Chris

[drz400]

I love the label!

A Request from Dumble.......
This amplifier has circuits and design features that are unique to this amplifier and were developed exclusively by Alexander Dumble. As a provision, it would be much appreciated if these circuits and design features would be held in the utmost proprietary secrecy. Bootleggers and amp pirates are a disgusting lot. There's no reason to make things easy for them.

Thanks,
Alexander Dumble

That's so much better than the old secrecy contracts. I'm not sure if we're bootleggers or amp pirates.

Both
I think the worst for him is 2 rock, Fuchs and Bruno
Then the boys in groups like this are next on his list.

[Frost]

Hey guys,

I did a Google search and found out that the Slidewinder is a Fender pre-amp into a Marshall power-amp without a Master Volume. I asume Fender Black Face into Marshall plexi.

HOWEVER, my good friend John Kelley Brown and I have experimented for years with similar topologies without good results. I do not believe that the above would generate good results due to the Marshall PI being opposite with what the Fender pre-amp requires. Basically, a Fender PI needs a lower PI cathode resistor than the Marshall PI to sound good. Anyways, YMMV but I stand by our analysis of this and have to disagree sincerely with H.A.D.

Take care and hope this helps some of you.

Heiko Frost
Frostwerks Guitar Amplification

[Odd-Arne]

According to Mike it`s just a 50 watt Bassman sort of thing. It`s said to not be anything inparticular, just made to Mike`s taste.

I`ve only heard the record offcourse and listening to similar ampbuild clips I think they sound pretty similar. There`s something about the bass, but I think that`s just as much about the cab as the head.

[FUCHSAUDIO]

I love the label!

A Request from Dumble.......
This amplifier has circuits and design features that are unique to this amplifier and were developed exclusively by Alexander Dumble. As a provision, it would be much appreciated if these circuits and design features would be held in the utmost proprietary secrecy. Bootleggers and amp pirates are a disgusting lot. There's no reason to make things easy for them.

Thanks,
Alexander Dumble

That's so much better than the old secrecy contracts. I'm not sure if we're bootleggers or amp pirates.

Both
I think the worst for him is 2 rock, Fuchs and Bruno
Then the boys in groups like this are next on his list.

Yes, we often all talk to one another late at night ,when we're not sleeping over this....

[dr. who]

Hey andy I guess that makes you a demon in his eyes, and joemloganowski a saint. I guess I like the dark side cause they actually share knowledge to further the masses. I'm getting weird parallels to the recent election so I'm out for now...off to another thread.

[Roe]

Hey guys,

I did a Google search and found out that the Slidewinder is a Fender pre-amp into a Marshall power-amp without a Master Volume. I asume Fender Black Face into Marshall plexi.

HOWEVER, my good friend John Kelley Brown and I have experimented for years with similar topologies without good results. I do not believe that the above would generate good results due to the Marshall PI being opposite with what the Fender pre-amp requires. Basically, a Fender PI needs a lower PI cathode resistor than the Marshall PI to sound good. Anyways, YMMV but I stand by our analysis of this and have to disagree sincerely with H.A.D.

Take care and hope this helps some of you.

Heiko Frost
Frostwerks Guitar Amplification

both fender and marshall used a 470 ohm cathode resistor in the PI, the exception being the 270 ohm resistor in the silverface amps

[Structo]

True, but those amps generally use a 12AT7 there.
Wouldn't the tail be different if using a 12AX7? Like a 820R?

[Zippy]

Could we please be more specific when saying "those" amps? There are a lot of Fenders out there and many of us share a different history about "those" amps. I would cite just as many Fenders with 12AX7s as you might 12AT7s - and many use a 470.

Example:

Deluxe Reverb (AB763), PI: 12AT7, 22k/470

Bassman (5F6-A), PI: 12AX7, 10k/470

And just so we don't jump onto the bandwagon that ALL Fenders use a 470, there is my dear ol' brown tolex era fav':

Vibrolux (6G11), PI: 12AX7, 6800/820

[Funkalicousgroove]

The Slidewinder is just a 5F6-A bassman, nothing more, nothing less.

There may be a couple value tweaks, but the folks I know that have played them all said that it was just a Bassman.

[Fischerman]

I wonder if Frost just got the two mfr. names reversed. Maybe he meant that the Marshall needs a lower cathode resistor? It's all somewhat dependant on the tail resistor since all the current (which is determined mostly by the cathode resistor value) goes through the tail to 'lift' the whole PI.

So in a Marshall with a 10K tail you need a good amount of current to get enough voltage drop across that 10K...so 470 works well. In the Fender with a 22k tail you need less current to get a similar voltage drop across that 22k...so 820 works there. Yea...there were PIs over the years that used all sorts of combos but that's my take on it. I've been meaning to get some 680 ohm resistors just for PIs because it's often the perfect Rk value.

Also, I've hypothesized for the longest time that Fender designed the BF PI to work with a 12AX7. Just look at the values...they SCREAM "designed for a 12AX7". But then somebody stuck a 12AT7 in there and said; "Oooooh...it's cleaner...and cleaner is better." and they just used the 12AT7. It's no surprise that tons of folks prefer a 12AX7 in their BF Fender that calls for a 12AT7. It wasn't until CBS came along that they optimized the circuit for the 12AT7 (the one with 47k plates, 330k PI grid loads, etc.). The CBS amps get poo-poo'd a lot but some of the stuff they did was good. And that PI was one of them imo. Can't tell you how many times somebody 'Blackfaces' their SF amp...but it sounds worse. All imo.