Simplistic NJFET RIAA

[RCruz]

Ricardo, do you use a pair of SSLV 1.2R even in this project?
I read you are going to build a SSLV 1.1, are you going to compare that shunt reg vs the 1.2R?

P.S. 2k2 in lieu of 1.8K (R11) ?

P.P.S. Happy new Year!

Hi Massimo

I tend to use V12R in all my builds... IMO it is the best (The Optimae was even better "had magic properties" but was too prone to oscilating)

Off course I did not try all options of the SSLV 1.1 so I can not comment.

R11 yes

 

[merlin el mago]

I will delete Q5, I will use C2=15.2nF, R2,R3=3R, R6 3M3, R10 6.4K, R8 43R, R11 1.2K, R12 trimmer arrangement like in the folded pdf.

Like attached pic?

 

[Salas]

Yes.

 

[merlin el mago]

Hi Massimo

I tend to use V12R in all my builds... IMO it is the best (The Optimae was even better "had magic properties" but was too prone to oscilating)

Off course I did not try all options of the SSLV 1.1 so I can not comment.

R11 yes

In my humble opinion to don't worry about the best and easy solution is to buy a BiB in the Tea-Bag GB.

 

[merlin el mago]

Yes.

😉

 

[merlin el mago]

Salas, I have five 7.8mA and four 7.7mA K170, could I use?

 

[RCruz]

🙂

 

[merlin el mago]

Salas, I have five 7.8mA and four 7.7mA K170, could I use?

🙂

Sorry, exactly Ricardo have five 7.8mA and four 7.7mA K170, could I use?

 

[Salas]

It will not go too far off I suppose.

 

[merlin el mago]

Thanks Salas, I will ask Ricardo.

Ricardo YHPM

 

[merlin el mago]

Who knows a source for SK369BL?

 

[vgeorge]

Who knows a source for SK369BL?

As we said before, search on ebay for those that are on ammo tape. I bought some not on tape and came out fakes.

 

[RCruz]

The k170 are on their way Merlin 🙂

 

[andyr]

As we said before, search on ebay for those that are on ammo tape. I bought some not on tape and came out fakes.

What gave them away as being fakes?

Regards,

Andy

 

[vgeorge]

What gave them away as being fakes?

Regards,

Andy

Too high IDSS.

 

[andyr]

Too high IDSS.

Thanks, George. The reason I ask is that I also ordered a stack of 2SK170s from the Internet and was wondering if they were genuine (the seller said they were Toshiba). Idss measures what they should be (around 6ma) - so I guess I can assume they are "real"? 🙂

Regards,

Andy

 

[merlin el mago]

As we said before, search on ebay for those that are on ammo tape. I bought some not on tape and came out fakes.

Thanks for advice George.

The k170 are on their way Merlin 🙂

Thank you Ricardo.

 

[vgeorge]

Thanks, George. The reason I ask is that I also ordered a stack of 2SK170s from the Internet and was wondering if they were genuine (the seller said they were Toshiba). Idss measures what they should be (around 6ma) - so I guess I can assume they are "real"? 🙂

Regards,

Andy

Around 6mA should be GR type. If they have the right IDSS chances are they are real. Better buy from Spencer, a member here, to be sure.

 

[massimo]

I tend to use V12R in all my builds... IMO it is the best (The Optimae was even better "had magic properties" but was too prone to oscilating)

Optimae ? 😕 Do you mean the 1.2 first release?

 

[andyr]

Around 6mA should be GR type. If they have the right IDSS chances are they are real. Better buy from Spencer, a member here, to be sure.

Thanks, George - can you tell me how I can contact "Spencer"?


Regards,

Andrew