Keantoken's Aurum-X 300w Amp with LatFETs

Jump to Latest
#221
thompsontechs said:
The cool thing, perhaps for your needs, is there are many great lower power amps here, for you, to chose from. Nelson, and others, have seen to that. I love the AN (Alpha Nirvana) the Badger and I think the Wolverine is going to be something special as well. All of those throw a pretty nice punch depending on your needs. Also the Wolverine is going to do something like 190W into 4ohms, which is what my primary speakers are. I also find it's rare that I use over 10W, but my speakers are efficient.

Anyway, good luck. 🙂

JT
Click to expand...
Thanks,
 
#224
CPF33R9200DKB14 depending on what we can do for this, it's a full stop right there.This part can't be had for at least 3 weeks.

If we can use a wirewound, there's an option, but if inductance is an issue, there are no options that keep us within 1% of 3.92R

EDIT: I found this: RS02B3R900FB12 that should work, a little long, but doable I think.
 
Last edited:
#229
I'm going back and forth, I don't know if I can afford a $1500 to build this animal right now. Anyone willing to help with parts cost, hit me with a PM. The wife threatened me with the couch, only slightly kidding. 🙂 I have most of it in several carts all over the world, but money is tight.
 
#230
Hi JT,

I feel for you. This amp is premium with a P as the BOM is no joke. I think many bigger DIY amps fall in this price range if you include the chassis, premium output devices and big trafos easily hit the $1500 mark.

I doubt any resistors need to be 0.1% on this amp.

JPS64 recently turned me onto TE Connectivity RR03 series resistors ever since Panasonic ERX have gone obsolete.

3W metal thin film 300ppm 5% and plenty in stock. Great for emitter resistors. Not pricey.

For example:
https://www.mouser.com/ProductDetai...GAEpiMZZMtJuH53xR2FXH%2B86MJhMhg1KRVqWd3O6GI=
https://www.mouser.com/datasheet/2/418/8/NG_DS_3_1773449_2_E-725777.pdf
Good sleuthing on the Wima’s. Make equal substitutes if needed. Many time MKS work perfectly fine instead of MKP.
 
Last edited:
#233
That’s too bad JT. I understand that it’s gotten a bit beyond what you expected. We respect your decision though. If this was a commercial amp and I needed a verification builder you would have gotten parts falling from the sky for free. But this amp is just hobby for me as it is Keantoken’s design.
 
#236
I am extremely curious / interested in this (thread, topic, schematic) amp prospect. I have working 57, 63, 70, 82, 90 volt transformers / power supplies built. Could? consider including this marvelous circuit. I am only building mono amp chassis(s), to maintain greater flexibility.

~ I LOVE THIS circuit, and prior iterations.. concepts ~

I have several amplifier cores already built, these amplifiers frames will work, are oriented, in ways I could easily build / include multiple amp modules, in one chassis for testing. I have been comparing (A - B'ing) MOS-FET, to BJT, and plan to include, already have on hand, Hypex NC400HRX, ICE "500" modules.

While I would have to budget for it... I would love to consider prospect of including the Aurum-x.
I do have several (an unused / matched) set(s) of Exicons, both singles and duals.

Are these boards available for purchase? What is (your hope) the timeline for need of completion?

Example of concept. I had to actually build it, to model idea(s)
and see if I like it... as a variation of several prior builds...


Open frame sm.JPG
 
#238
Fantastic stuff Ozark! Vunce and I have been using Makerbeam T rails on our builds a lot too.
1642018352640.jpeg

1642018434161.jpeg


But I have never made an entire frame with all edges from the rails. Your plans look great.

Since Thompson Tech won’t be building this anymore he can forward you the PCBs if you are interested in being a verification builder. It looks like you have the chassis and heatsinks all figured out.
 
Last edited:
#239
Vunce said:
Fantastic chassis work Ozark HiFi!! I have many projects going that would work perfectly in them, Hehehe!
:cheers:
Click to expand...
Thank you! I appreciate the comment. Like what you are doing...
xrk971 said:
Fantastic stuff Ozark! Vunce and I have been using Makerbeam T rails on our builds a lot too.

But I have never made an entire frame with all edges from the rails. Your plans look great.

Since Thompson Tech won’t be building this anymore he can forward you the PCBs if you are interested in being a verification builder. It looks like you have the chassis and heatsinks all figured out.
Click to expand...
Thank you! Your images of your build look fantastic...
like the PCB / amp layout.

I wanted to build "something like" a beefy lab PS.
An imperative, open architecture for easier idea modeling.
Having multiple surfaces for easy (multiple?) heat-sink mounting
*this model also makes it easy to work on from any angle,
and/or to attach (amp as discrete sections in) circuitry.

I sort of stumbled into this thread...
but IT FITS the order of my interest(s)
and efforts. Love the Schematic!

[for me] Building better power supplies...
to test next generation amplifier circuits...
to test better PSs. (on and on)

I am serious, appreciate the consideration and/or inclusion.
Would readily devote the resources (over current projects)
for such a sensible (remarkably robust) design.
 
#240
I am currently using (and very happy with) PA7/PA8 driver cards
with a pair of (1) KSA1381 and (1) KSC3503... in 11 .pairs. of driver cards,
in multiple amp configurations... driving Hitachi and Exicon... mostly
the dual die devices, I am hooked on such power driving Maggies.

The "modest" KSA1381/KSC3503 driver pair will drive the
high(er) capacitance gate . f i n e . I can only imagine
the Aurum-X configuration as shown...

I have to experience it myself, with a BIG ~ linear ~ point to point
wired ~ power supply. *not dissing anyone else's approach.
It 'has to fit in' with the family of components in use.
 
You must log in or register to reply here.
Top Bottom