2sk77b

[Zen Mod]

tnx to AnthonyA , datasheet , here : Tokin 2SK77B datasheet | Zen Mod Blog

 

[flocchini]

No typo as far as I know. The cap to the left of the 4N37 is labeled 1K (1000uF) and the cap at the speaker output is labeled 10K (10,000uF).

I have built this circuit with those values and it works and it sounds great. Not with 2SK77B of course, but with THF-51S.

Great meeting you at BA2019

Did you use the ixfn140n20p in your build?

Thanks

Bob

 

[Ben Mah]

Hi Bob,

It was great meeting you too. It was my first BAF and I had a great time.

I did use the IXFN140N20P for the CCS.

You mentioned that your were working on this amplifier too. Is it nearly finished?

Ben

 

[flocchini]

Hope to see you at many more.

I have one channel working - hopefully during the next week or so I will get the other going.

Thank you

 

[Zen Mod]

K, m, dilemma , whatever

use fine , fast , settable B-

5V is enough , negative

even 7905 will work (put some shunt load on output , say 15mA will do the job so 330R regular resistor will do) , though LM431 or LM336Z-5 are better for better sleep , if nothing else

 

[Dennis Hui]

Hey Bob and Ben,

Seeing both of you building this amp using the Tokin Vfet is quite
an inspiration. I hope to give it a try later.

Cheers,
Dennis

 

[flocchini]

Inspired by the sound of SissySit !!!

 

[Zen Mod]

oh yeah , that one is sissy sounding one

 

[flocchini]

😀😀😀😀😀😀

At some point I will have to build an amp that doesn't use unobtanium
Only have 4 THF-51S spares

 

[Zen Mod]

plenty for a lifetime worth of amps 🙂

further projects , yup, why no toobz?

 

[flocchini]

always open to toobz

 

[Zen Mod]

feel free to proceed with e-mails , regarding toobz

now got to sleep a little , sorta arriving in proper time-space continuum

🙂

 

[flocchini]

You must be on CA time😀

It would be hard to beat the Sissy😀

Also want to hear that F8 and a XA25 with my speakers

Talk about a Greedy Boy 😱

 

[WBS]

Bob if you pull that off, I'd like to have a listen! Maybe an A/B session after the final F8 design is released. 😀

 

[Ben Mah]

Hey Bob and Ben,

Seeing both of you building this amp using the Tokin Vfet is quite
an inspiration. I hope to give it a try later.

Cheers,
Dennis

Hi Dennis,

You definitely should build it.

It was a great BAF, meeting you, and Zen Mod, too.

Ben

 

[flocchini]

Bob if you pull that off, I'd like to have a listen! Maybe an A/B session after the final F8 design is released. 😀

I'll work on it 😀

 

[AnthonyA]

Hey zenmod
Most welcome
Hope my mistress did a good job.. Took a foto but it's not clear and got to scan it.good mistress.

So are u going to do with 2sk77b? PAPA design or gonna make a greedy Boyz version?

 

[Zen Mod]

time will tell and I'll show what I did

 

[chede]

Hi Bob,

was great seing all of you at BAF too ... 😀

... please listen to Zen Mod and don't dissmiss some toobz against the SissySIT too easily ... after I built the SissySIT, my newest build is an EL84 PP tube amp.

And what do I have to say, I like it as much as my SissySIT with my speakers 🙂

It's a John Broskie design, and the thread about it is here:
Unexpectedly good EL84 amp
... my build is towards the end ...

I got some good tips regarding my bias circuit from a discussion with Zen Mod at BAF, have to find some time to implement it.


By the way, about half an hour ago I finished the ACP+ ... I bought the last kit that was available at BAF. It's playing right now, and it's sounding veerryy promising with my EL84 😀 (... though now way too much gain in the system)


Sorry for the OT, regards, Claas

 

[flocchini]

Claas

Thank you for the info !!!
I'll check out the thread.


I am open as I emailed to ZM