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.
But if you insist on Toshibas, punkydawgs is trusted and recommended... (almost as Salas is 
)
https://www.ebay.com/str/punkydawgs
)https://www.ebay.com/str/punkydawgs
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
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.
Although the B1 Mesmerize buffer is admirable, all that I am looking to do is build a buffer stage using transistor design. I know this should be simple, but pointing me toward a simple kit would be great. I have a passive preamp that I have built and want to add a buffer stage to.
I should add that Pete Millett's Nutube buffer has come to mind, but I need to test it out first. It uses discreet transistor design so that is a plus. The other side of the coin is finding a power supply that isn't behemoth for this little guy.
I should add that Pete Millett's Nutube buffer has come to mind, but I need to test it out first. It uses discreet transistor design so that is a plus. The other side of the coin is finding a power supply that isn't behemoth for this little guy.
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Well, JFET is a kind of transistor (junction field effect transistor) so adding Mezmerize also answers the brief. Offers measured 0.001% THD+N at 1VRMS output or 100dB SINAD at 0dBV. In other words objective resolution is good. Subjectively its also a 15 years popular DIY classic. You can't go wrong.
Yes, I agree. I do not need all of the other options of the board such as relay selectors for the inputs, What I am looking for is a board that is much simpler for my needs. No muting either. The Mesmerize is a great product on its own merits, but I just need a buffer stage that is all. In/out/power/done.