Will the 2SK180 sound as good as the THF-51N ?it'll work with any Tokin SIT you throw in
You’ll have to give me a clue to help decipher that . . . .no
send them to OPLDF
Edit: or was the “No” a serious answer?Ha ha
Meanwhile, could you answer to my question?
I can almost answer that - it depends on the application.
2SK180 is perhaps better for smaller power amp.
I was wondering just this morning about the fabrication differences (if any) between these Tokins and the Sony/Yamaha VFETs, and whether it all comes down to application, or if those designed specifically for audio are inherently a cut above the elevator shakers (lol table shakers).
Of course, this question could quickly diverge into a technical deep dive on transistor specs and selection, but on a high level, I'd imagine the Tokins should be able to keep up if used in a proper circuit, yeah?
Of course, this question could quickly diverge into a technical deep dive on transistor specs and selection, but on a high level, I'd imagine the Tokins should be able to keep up if used in a proper circuit, yeah?
you can read something about measured performance differences between THF51, 2SK180 and 2SK182, in common source application , in Singing Bush thread(s) - practically Papa's amp presented on BAF 2015 (hope got year correctly)
SissySIT is made primarily with THF51, and I always wrote that I'm expecting differences between those 3 SIT types being smaller in DEF circuit, than they are in common source (Singing Bush) one
I did some SissySIT tests with remaining two, in place of THF51, but was lazy to document them in any way - when I heard how they sung, I just didn't care for any measurements
Pa took some serious work with smaller ones (Sony), so I just didn't found them so damn provocative to play with ..... especially because he made that one (first!, I believe ) also presented on BAF - just input xformer and two VFets
that one is worthy, pure poetry .... and it was sorta pitty that he didn't made complete Jewel in lieu of M2** ..... maybe I'll try to play with that one, to make something enough different that I can call it Babelfish
my main efforts were put to investigate is it possible to make DEFiSIT for masses ....... and I'm damn pleased how it becomes
**if I'm going high whenever I think of Geniality of M2, imagine how high would I be in case that Pa made that, as finished package......anyway, there is still a weak chance of me having Lucida Intervala and actually getting to challenge ..... in fact, this is first time I ever think of that .......
huh, I must suppress my self now, need some sleep tonight .....
SissySIT is made primarily with THF51, and I always wrote that I'm expecting differences between those 3 SIT types being smaller in DEF circuit, than they are in common source (Singing Bush) one
I did some SissySIT tests with remaining two, in place of THF51, but was lazy to document them in any way - when I heard how they sung, I just didn't care for any measurements
Pa took some serious work with smaller ones (Sony), so I just didn't found them so damn provocative to play with ..... especially because he made that one (first!, I believe ) also presented on BAF - just input xformer and two VFets
that one is worthy, pure poetry .... and it was sorta pitty that he didn't made complete Jewel in lieu of M2** ..... maybe I'll try to play with that one, to make something enough different that I can call it Babelfish
my main efforts were put to investigate is it possible to make DEFiSIT for masses ....... and I'm damn pleased how it becomes
**if I'm going high whenever I think of Geniality of M2, imagine how high would I be in case that Pa made that, as finished package......anyway, there is still a weak chance of me having Lucida Intervala and actually getting to challenge ..... in fact, this is first time I ever think of that .......
huh, I must suppress my self now, need some sleep tonight .....
Wired mine up (finally) today.
New switch board working fine, to sure about the LED in the bulgin momentary switch. I can get it to come on with the wires either way. Power on, with delay, and power off fine.
1) first board I could get 160 mv fine, and finally got DC offset close. FE set fine.
2) Other board set up nicely. 160, DC good, FE good. Biased up to 198, with 0 DC offset.
3) Back to first board, Bias tops at 194 mv. DC offset stuck at -13.x volts, and does not move with the pot.
verified both boards getting 22.3v under load.
Suggestions?
New switch board working fine, to sure about the LED in the bulgin momentary switch. I can get it to come on with the wires either way. Power on, with delay, and power off fine.
1) first board I could get 160 mv fine, and finally got DC offset close. FE set fine.
2) Other board set up nicely. 160, DC good, FE good. Biased up to 198, with 0 DC offset.
3) Back to first board, Bias tops at 194 mv. DC offset stuck at -13.x volts, and does not move with the pot.
verified both boards getting 22.3v under load.
Suggestions?
SissySIT R3. THF-51S from watanabletomoaki (roughly matched)
I never got bias up over 160mv across 0R11, and that DC offset went under 2v. When I returned from doing the second scanner, I figured the voltage drop from second board hookup might smooth it out, but it got worse instead.
max Bias is 164, not 194 (my mistake above), with offset -13v or so, and unchanged by turning to offset pot.
* went for a walk * I’ll take another look at it after I clean up.
I never got bias up over 160mv across 0R11, and that DC offset went under 2v. When I returned from doing the second scanner, I figured the voltage drop from second board hookup might smooth it out, but it got worse instead.
max Bias is 164, not 194 (my mistake above), with offset -13v or so, and unchanged by turning to offset pot.
* went for a walk * I’ll take another look at it after I clean up.
