What's up with dynafet boards these days?

[Icarium]

Looking forward to someday having one of these built.

[Nanoha]

Don't know, but I would be interested myself. And what happened to bamaslama boards?

[kevin gilmore]

I'm waiting for linear systems to get their butt in gear and actually deliver on

lsk109's. Then the floodgates open. The lsk389 is so much better than either

the 2sk389 or the individual versions used in the B52 that it is worth waiting

to do it right. I have a dynafet prototype with 2sk389/2sj109 and it is kickass.

No matching of parts will be necessary, just stuff the board and it works.

[Edwood]

Will I be able to fry an egg on the heatsinks?

[kevin gilmore]

Will I be able to fry an egg on the heatsinks?

Nope. If you want to do that, find a raptor with the original power supply.

Cooks eggs just fine.

[Augsburger]

Nope. If you want to do that, find a raptor with the original power supply.

Cooks eggs just fine.

It is also great for refinishing furniture, it removes varnish and paint with ease. No need to visit Home Depot anymore.

[DigiPete]

Kevin,

Will the DynaFet work properly at a gain or 4 or 5 for 60ohm headphones, with just two output devices per channel vs. the 4 per channel, shown on the latest pcbs over on headwize?

I know your original sketch showed two output devices per channel.

Pete

[Icarium]

Excellent KG, most excellent.

[purk]

Is this the upgrade version of Dynamight?

[PFKMan23]

Isn't this a new project unrelated to the Dynahi/might?

[Edwood]

Nope. If you want to do that, find a raptor with the original power supply.

Cooks eggs just fine.

Sweet, there should be more convergence headphone products. George Foreman Headphone Amp Grill!

[aerius]

Isn't this a new project unrelated to the Dynahi/might?

It's exactly the same, but completely different.

[fierce_freak]

I've been tinkering with tubes more lately, but I'll definitely build a dynafet when they're ready to go.

[Icarium]

It's exactly the same, but completely different.

It's actually a close cousin to the Dynasaur

[kevin gilmore]

Kevin,

Will the DynaFet work properly at a gain or 4 or 5 for 60ohm headphones, with just two output devices per channel vs. the 4 per channel, shown on the latest pcbs over on headwize?

Yes it will, without any additional compensation, i have one running at a gain of 4 now. You can certainly build

it with 2 devices per channel. But i like the sound of the renasys fets over the international rectifier versions, and

they are not as strong, so you really should do 4 of them. There are 4 different versions of the boards, and when

i'm sure of the pinout of the lsj109 there will be 4 new versions. Build what ever turns your crank.

Then again compaired to the toy output transistors on the (well you know) you could probably just build it with

one set of output transistors. But where is the fun in that. Need to be able to drive k1000's to painfully loud levels.

[DigiPete]

Yes it will, without any additional compensation, i have one running at a gain of 4 now. You can certainly build

it with 2 devices per channel. But i like the sound of the renasys fets over the international rectifier versions, and

they are not as strong, so you really should do 4 of them. There are 4 different versions of the boards, and when

i'm sure of the pinout of the lsj109 there will be 4 new versions. Build what ever turns your crank.

Then again compaired to the toy output transistors on the (well you know) you could probably just build it with

one set of output transistors. But where is the fun in that. Need to be able to drive k1000's to painfully loud levels.

Kevin,

I will never run K1000s, so I am looking to reduce the energy footprint of a blanced version,

without a penalty in sonic quality.

Which fets are the renasys?

the "well you know"??

Cheers

Pete

[amb]

Renesas is the (not so) new owner of what was once the semiconductor arm of Hitachi. The Renesas parts Kevin refers to are the 2SK213/2SJ76 - 2SK216/2SJ79.

[kevin gilmore]

the "well you know" are those toy 400mw transistors one particular

famous manufacturer and good friend of mine use...

[Nanoha]

Renesas is the (not so) new owner of what was once the semiconductor arm of Hitachi. The Renesas parts Kevin refers to are the 2SK213/2SJ76 - 2SK216/2SJ79.

amb, you should post more!!

[amb]

amb, you should post more!!

I would love to, but have trouble keeping up with too many forums. Aside from headwize which remains my mainstay, head-fi and here, I also peruse several other forums periodically.

[Nanoha]

I would love to, but have trouble keeping up with too many forums. Aside from headwize which remains my mainstay, head-fi and here, I also peruse several other forums periodically.

Makes sense.

[deepak]

Kevin any updates? And is the finalized name of the amp DynaGBF?

[kevin gilmore]

still waiting for linear systems (or anyone else) to get off their asses and

start selling dual matched complimentary front end fets. After that, lots

of new stuff. Of course the world really does change in the middle of february.

[Dreadhead]

still waiting for linear systems (or anyone else) to get off their asses and

start selling dual matched complimentary front end fets. After that, lots

of new stuff. Of course the world really does change in the middle of february.

Middle of February?

[cclragnarok]

Middle of February?

My birthday?

Or the end of analog TV?