Semisouth goes Dodo ; what now ?

[nicoch58]

Thank Nelson

 

[kasey197]

Nice and balanced article.

Notwithstanding the GDS pinout and the differences in semiconductor physics,
from a practical perspective, the device appears to be similar to a BJT.

At least in the context of a linear audio amplifier output device.
Interesting part.

Thanks NP

 

[2 picoDumbs]

Low input impedance is a real let down for me (only in terms device specs). As always I'm sure it sounds great

 

[Semisouthfan]

This part is a BJT. 😀

Nice and balanced article.

Notwithstanding the GDS pinout and the differences in semiconductor physics,
from a practical perspective, the device appears to be similar to a BJT.

At least in the context of a linear audio amplifier output device.
Interesting part.

Thanks NP

 

[Semisouthfan]

BTW, I built a "Zen" version of an amplifier using the GA10JT12 in a single-
stage single-ended Common-Source amplifier without feedback, and I will
be posting the results shortly.

😎

Nice read. Interesting to see some results with a SiC BJT.

 

[genesicsemi]

This part is a BJT. 😀

Sure. If you do not understand/care about semiconductor physics 😀

 

[Semisouthfan]

Ha ha. I teach semiconductor physics.

 

[wrenchone]

I was considering a somewhat mare acerbic reply, but hey...

 

[scott wurcer]

I was considering a somewhat mare acerbic reply, but hey...

Marketing vs. engineering the final battleground it's become worse than anyone can think.

 

[wrenchone]

It's the original battleground as well as the final. Dilbert hits close to home all too often.

 

[scott wurcer]

It's the original battleground as well as the final. Dilbert hits close to home all too often.

The question now is whether to go out with a bang or wimper.

 

[scott wurcer]

This device is quite unique - it cannot be classified in the traditional NPN structure, or like a FET. It switches like a FET (purely capacitive); but has current gain (which if you think about it a JFET also has a finite current gain). In terms of temperature dependence of on-state and switching characteristics, it is a FET-like behavior. The physics of operation is NOT bipolar, and that is why we do not refer to this device as a "bipolar" transistor. It is not just a marketing game - there are good reasons for this nomenclature that many "experts" did not understand.

Does your company condone posting this nonsense on a public forum.

 

[wrenchone]

Re your earlier post, it's best to ignore noise & disinformation and forge on with doing what really interests you. This is mostly a hobby forum, after all. None of the bally-hoo splashed around in this thread lately has induced me to whip out my credit card.

 

[Mooly]

Disrespectful and insulting posts have been deleted and points handed out.

 

[Zen Mod]

whatever the story/rumble was , Nelson did necessary put up or shut up thing :

http://www.firstwatt.com/pdf/art_zen_ ga10jt12.pdf

enough info about the part itself , at least as I'm concerned

 

[scott wurcer]

enough info about the part itself , at least as I'm concerned

 

[WBS]

 

[DPH]

C'mon, Scott, don't you know wider bandgap semiconductors can just call themselves whatever name they like? 😀

(Add me to the list of calling a spade a spade, or a bjt a bjt)

 

[mikegranger]

BTW, I built a "Zen" version of an amplifier using the GA10JT12 in a single-
stage single-ended Common-Source amplifier without feedback, and I will
be posting the results shortly.

😎

Does anyone know if Papa ever built anything with the Cree SiC mosfets he bought a while back? Perhaps he skipped over them and built this amp instead. Just wondering if I missed anything.

 

[res07njc]

I don't think you've missed anything, but it would be a treat to read some of his wand-waving, or caveats at large regarding any issues. I know one of the C3M's didn't like my mini. Or vice versa. Haven't adjusted anything in the diff pair or rest of the amp, but might play around after the holidays to see if anything helps.. sound wise. I don't own any test equipment beyond DVM