Mezmerize B1 Buffer Preamp

[Salas]

Did the 2SK209 ever become a replacement for 2SK170's ?

The 2SK209 is an SMD equivalent to 2SK117 spec. Meaning low in transconductance when compared to the 2SK170.
But you can parallel two 2SK209 on an SMD to Through Hole mini adapter board creating a single 2SK170 equivalent.

 

[myleftear]

But if you insist on Toshibas, punkydawgs is trusted and recommended... (almost as Salas is )
https://www.ebay.com/str/punkydawgs

 

[richmain]

Hi Salas
I have checked the store and they are selling Toshiba ones as well as the Liner system ones, which do i go for price is not a issue.
Thanks

 

[Salas]

Those are K170/J74 NJFET/PJFET complementary matched sets. For other kinds of circuits.

 

[richmain]

Ok thanks good job i did not buy them.

 

[nashbap]

The Mez board depending on tolerances runs 170-200mA bias in its MOSFETs which is satisfactory. By many users that's been accepted as a wise spot between dissipation and subjective performance. Some wanted to can really crank it up though hence the Hypnotize edition. For an extra % of tone and sound stage.
But its enduring popularity says Mez is the best as an all-rounder. Has all the facilities on board and it sounds close to what can be ultimately achieved.

Hi Salas,
I have been using your Jfet buffer section circuit with a SSLV1.1 and quite pleased. I repurposed the SSLV1.1 here after I switched my other preamps from 1.1 to the Ubiib 1.3.
Could you please share your subjective opinion about using the buffer with the Mez, SSLV1.1 and SSLV1.3 power supplies. Just wondering since 1.3 made an improvement with the preamps what could it do here, maybe?
Thanks.
nash

 

[Salas]

Nash hi, unfortunately I can't answer that since I only ever run DCB1 Mez or Hypno with their onboard tuned together supply. Has heavier Mosfets and its all LEDs. Somewhat different to those 1.1 & 1.3 standalone cousins. You must run a comparison to conclude. Could be worthwhile to go from SSLV1.1 to 1.3.

 

[nashbap]

Thanks Salas. Maybe I will try.

 

[richmain]

Well i have taken the plunge and brought some matched Toshiba 2ks170 from punkydawgs.Do the mosfets need to be matched as well having trouble finding any.

 

[Salas]

No need to match the Mosfets in this design

 

[richmain]

Thanks Salas