Yamaha 2SK77 with First Watt design?

[ilimzn]

Well if someone is doing a vfet follower a lot of power can be had from a k77/j27 pair. Especially if a little gate current is available.

 

[Soundhappy]

We'll have to grow our own like Jeri Ellsworth.

This evening for the dessert gently lady offered me piece of chocolate brownie parfumed with orange fruits but next time she cook it substrate for 40 watt single-ended class A SIT transistors amplifier no doubt.Thanks sweet

Bungles do you have answer for your question ?



Homebrew NMOS Transistor Step by Step - So Easy Even Jeri Can Do It - YouTube

 

[Michael Rothacher]

You thinking about trying it, Mike?

I don't think I'm up to it. Maybe a triode.

 

[R-K Rønningstad]

Oh, I didn't know that. That's a bummer.

We'll have to grow our own like Jeri Ellsworth.

Fascinating. Homebrew NMOS Transistor Step by Step - So Easy Even Jeri Can Do It - YouTube

 

[flg]

Wow! So I guess we need to figure out what the SIT structure needs to be. I need to modify my oven too! When do we start?

 

[Zen Mod]

I'm going to convince my small batch of SITs that half of them are male and other half female

then to put them in same drawer for some time ........ hoping to see small ones soon

- accordingly to my capabilities , that would be more fruitful , than trying to make them ...

 

[Soundhappy]

From First Watt news page about mr Pass creations :

" two Yamaha SIT amplifiers "

One 40 watt single-ended 2SK77B amp and another , what difference between ?
Greetings

Hi Zen Mod

 

[von Ah]

What an amazing thread...

 

[Bungles]

I think the answer is there are a lot of other options that don't require using the hard to find Yamaka 2sk77's I have. I think I'd like to see how these 77b's develop before I dedicate those rare birds to a project. Just waiting on my power caps to arrive for my Aleph J! First attempt at a diy project so I'm super excited. I do need to purchase a quality soldering gun as well so thats next on the list.

 

[Nelson Pass]

Soldering Iron.

A 30-40 watt temp controlled unit and a 60 watt beastie.

No solder guns allowed.

 

[Bungles]

My apologies Mr. Pass . Soldering Iron.

 

[Blues]

Don't carry no gun in this here town pardner...not when the Sheriff's around. Just pack some iron...

 

[Michael Rothacher]

Repeat after me:

This is my iron, this is my gun. This one's for soldering, this one's for plumb (ing).

 

[Zen Mod]

Papa ........

 

[Soundhappy]

Peace & DIY

 

[R-K Rønningstad]

Wow! So I guess we need to figure out what the SIT structure needs to be. I need to modify my oven too! When do we start?

I am going to borrow old Singh's tandoori oven for the purpose!

 

[Soundhappy]

With formula from mr Nishizawa we let's cook SIT's with more success
and avoid abuse of spice

Jun-ichi Nishizawa - GHN: IEEE Global History Network

Jun-ichi Nishizawa - Wikipedia, the free encyclopedia

 

[woody]

But where do we buy these super rare SIT's? Or is this almost like catching a unicorn where you have to use an almost mythical creature ( a virgin ) to catch a mythical creature.

 

[Soundhappy]

Internal structure of Vfet is very simple if compare with modern chips high complexity.

Sit is easy to cook...

 

[Nelson Pass]

But where do we buy these super rare SIT's? Or is this almost like catching a unicorn where you have to use an almost mythical creature ( a virgin ) to catch a mythical creature.

circuitdiy.com has the Sony parts in complementary pairs and is a reliable
source. Mike Rothacher has also done a couple of projects with these parts.