john curl said:
"The audio market does not need another 'zero' in front of the THD spec." --Charles Hansen
Thought the spec wars were left behind in the 1970s?
se
Nelson Pass said:
We ordered 500,000 pieces. Should last us a while.
Think where McIntosh would be if they had ordered 500,000 tubes before Mullard shut down operations.
Hmmm, how would that compare to putting the money in an index fund for the same period? What do those things go for as NOS these days?
SY said:
Who cares?
You can always make more money. But killer sound? Now that's another story entirely....
Agreed, but good output tubes have usually been available in moderate-to-large production quantities, nearly without interruption. I can buy a superb new production EL84 (for example) in 10,000 lots with a very short lead-time, but I can't get a low noise p-FET in onesy-twosies for my phono stage.
Unless I can sweet-talk you out of a few.😉
Unless I can sweet-talk you out of a few.😉
http://www.renesas.com/fmwk.jsp?cnt...ower_mosfets_for_amplifier/power_mos_gen_amp/
>but I can't get a low noise p-FET in
>onesy-twosies for my phono stage.
Consider the 2sk213 and its complement for
your amplification needs.
Not jfets, but fets.
~ same u as 2sk170
>but I can't get a low noise p-FET in
>onesy-twosies for my phono stage.
Consider the 2sk213 and its complement for
your amplification needs.
Not jfets, but fets.
~ same u as 2sk170
Power mosfets are very quiet because of the mutiple cells.
Like the bipolar hyper quiet 'xsistor' that is actually a bunch
of xsistors in parallel.
Because of entropy the sum of multiple random events
tends towards 0 <|:^))
Like the bipolar hyper quiet 'xsistor' that is actually a bunch
of xsistors in parallel.
Because of entropy the sum of multiple random events
tends towards 0 <|:^))
SY said:
That is just plain silly.
If that were true, there would be no demand and no premium price for NOS tubes. But clearly people recognize that the tubes made today in China, Russia, and eastern Europe are not as good as the ones made decades ago in Holland, the UK, and the US.
My best EL34's came from the last batch made in E-Germany by Siemens. They are wonderful. My Russian EL34's have higher distortion. I have 4 NEW ORIGINAL GOLD LION KT-88's. Anyone interested?
PS Hitsware has no idea what he is talking about. 1/f noise in ENORMOUS in mosfets.
PS Hitsware has no idea what he is talking about. 1/f noise in ENORMOUS in mosfets.
>Yes, but I need depletion mode. Picky, picky.
There may be something to that.
Tubes are 'depletion mode' . Right ?
http://www.nsti.org/Nanotech2008/showabstract.html?absno=699
There may be something to that.
Tubes are 'depletion mode' . Right ?
http://www.nsti.org/Nanotech2008/showabstract.html?absno=699
J fets and V fets are depletion mode. Mosfets can be either enhancement or depletion mode. Study before contributing! 
john curl said:
John,
What kind of output load are you looking at? Some of those best opamps out there have a standing current of close to 10mA. That would be enough for over 8VRMS in 600 ohms in class-A without any additional current sink. Possibly a single-sided current may cause problems in its own right because it shifts the xover point in the output stage, but that's just a gut feeling.
Jan Didden
Jan Didden
Charles Hansen said:
... especially if it could also be configured as a 2nd or 3rd generation current conveyor...😉
Jan Didden
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