The Burning Amp Festival- an Audio Happening

[eclectic2k]

Originally Posted by Roadbagger

If any of you are in the Bay area, one of the great surplus parts sellers is in Milpitas. The EXCESS SOLUTIONS company Excess Solutions Excess Solutions

they're right down the road from my work, and I didn't even know about them!

adding them to my list of favorites:
Halted (HSC), weird stuff, Anchor Electronics...

Thanks!

[carpenter]

Can you tell us a bit more about the way your amp operates?

[AR2]

Originally Posted by Roadbagger

The Quan-Tech was used extensively to match the gain, IDss/Vgs and noise characteristics of Linear Sys parts used in the BAF demo amp. Some years ago I worked with Mr. Stansbury to refine a vacuum tube adaptor for the 5173 to also measure equivalent input noise of small signal triodes. The WattSuckingFireball4 can be operated without feedback and have only the gain shift over temperature. Distortion and IM are about the same over the audio passband of 20-20K. Linearity was a combination of carefully matched parts, including resistors and caps, but primarily established by the balanced signal path Gm and successive reverse impedance isolation from stage to stage by strict differential device matching, optimized bias centering, and massive differences in source to load impedance.
The Tek 570 is my best tool for matching up transfer functions of various triodes used in tube preamps designed here. Another tool that has provided a great amount of data is the General Radio 561-D Vacuum Tube bridge designed by Tuttle which produces remarkably accurate Gm, Rp, and mu numbers for all the operating bias points of a thermionic triode or J-Fet at various audio frequencies.

K-wood

Hello Roadbagger,
and welcome to the forum. It is great to have such a knowledgeable guys like yourself with us. I was so happy to see you guys at the show. Particularly - thank you for the custom made t shirts - Linear Systems - Burning Amp Festival.

Vladimir

[jackinnj]

Originally Posted by AR2

Hello Roadbagger,
and welcome to the forum. It is great to have such a knowledgeable guys like yourself with us. I was so happy to see you guys at the show. Particularly - thank you for the custom made t shirts - Linear Systems - Burning Amp Festival.

Vladimir

...and a high transconductance P channel JFET would be mucho appreciated.

[slam]

Roadbagger, thanks for the explanation. I must be nice to have all those nice equipment at your finger tips.

Yeah the other goodies from Linear were quite nice. My wife actually wanted one when I showed her the T-shirt -- and she has nothing to do with audio!

[Variac]

Originally Posted by carpenter

Can you tell us a bit more about the way your amp operates?

Hey guys, I want this amp to be well documented in one place. I'm thinkin' that the thread created especially for the amp might be a good place!:


Watt Sucking Fireball Series

I have moved the posts specifically about the amp there. I have also made the thread "sticky" so it remains at the top of the Solid State forum. Of course continued posting would do the same thing into the future- see you there..

Mark

[hayenc]

Originally Posted by wrenchone

Which brings me to another point - the kind of cross-pollination that happens during BA could happen in small local get-togethers all year long. What about it, Bay Area peoples?

I will work setting up a separate thread for this, but for now wanted to get the word out to those who could not make it to BA in CA, but are in the Southwest. Arizona DIY 2009 is December 5th in Tucson.

[FastEddy]

Re: BurningAmp Fest 2008 ... Nelson Pass Chassis #26 now has MOSFET modules: Post your Solid State pics here.

[brutepuppy]

Some of us left some items for Nelson and his son to take back with them when BAF2009 was done. Understood that there were several items to look at. Was there any progress with fixing them thus far?? All return information was taped onto my box.

many thanks,

Ray Corte
diy ident: brutepuppy

[wirewiggler]

Some one had a set of wave guide speakers and on short audition I quite enjoyed them. Amongst my other projects I would like to add a waveguide speaker project . Does any one know who the anonymous wave guide maker was?

Thanks
Bill