Jfet BOZ

[mpmarino]

Mr Mod,

You are a devilishly nice guy

-something like this - right??

 

[Zen Mod]

Mr Mod,

You are a devilishly nice guy

I know ;

-something like this - right??

yup

hehe- I'm not responsible for results.......but I know that you'll like it ;

don't make mistake as few others....... that 25K on input is volume pot,not trimpot

 

[Babowana]

-something like this - right??

Then, why not something like a source follower he he he?

 

[Manu]

don't make mistake as few others....... that 25K on input is volume pot,not trimpot

In order to appeal to Strauss-Meister I ve build a little balcony to support a ZM-approved Pot at the input. I'am very satisfied with the result, very satisfied with me, very proud,...
And it works.

This afternoon I observed something strange. After several connecting, deconnecting, reconnecting, etc. inputs and outputs, It appears that one channel became suddenly sort of nice White-noise generator (with little music playing in the background).
I replaced then all the Jfets of the said channel : and no white noise anymore.
Is that a typical case of blown Jfet?

Would it be a good idea to put some (zener) protection at the input?

Manu

Its very hot here in Vienna; we have at least 25° above ambient I guess.

 

[Manu]

I forgot the pics of course.

 

[Zen Mod]

.............

Would it be a good idea to put some (zener) protection at the input?

yes

Its very hot here in Vienna; we have at least 25° above ambient I guess.

who cares for ya........at least when I think that we aren't so far away...

it's hot to me ,too

edit :
there is no input protection which will be effective as little brain usage.......

make a habit: always power off all gadgets you want to mess with ;
always make contact with hot tip on case of device where you want to connect that silly connector

 

[Manu]

Side view

 

[Manu]

Back to back 9,1V zener like in Aleph L? Or other
What do you suggest
Thx
manu

 

[Zen Mod]

Back to back 9,1V zener like in Aleph L? Or other
What do you suggest
Thx
manu

look in 2SK170 data ( find pdf if you aren't already) and look what voltage G-S will make a zappppppppppppppppppppp .

then you'll know which zeners to use

 

[Manu]

I think I understood.
Thank you very much.

I don't know how it came to this damage, i'am most carefull and scary. But this time...

Manuel

 

[Vix]

This is what I did tonight....

 

[Vix]

No, it's not ready yet ....

Hopefully I'll do it over a weekend...

Regards,

Vix

p.s. Sorry for an awful picture quality (just some quick shots with my mediocre phone...)

 

[mpmarino]

HeY! The freakin little thing works.

Sounds pretty good too!

 

[Zen Mod]

HeY! The freakin little thing works.

Sounds pretty good too!

plain or buffer............plain ?

 

[mpmarino]

plain

gimme a year to try and work the buffer ting in.


The bass is fast and the highs detailed. There's a tiny bit of something missing - AC hum

 

[Zen Mod]

plain

gimme a year to try and work the buffer ting in.


The bass is fast and the highs detailed. There's a tiny bit of something missing - AC hum

lazy boy..........
hehe
I'm even more lazy.....I didn't maked it at all

 

[Manu]

This is what I did tonight....

Manu

 

[Zen Mod]

Manu

smells fine.........

 

[Magura]

Very ingenious.

Very cheap and easy....I like cheap and easy

Magura

 

[Zen Mod]

Very cheap and easy....I like cheap and easy

Magura

yes ,you are known as cheapskate...........