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-   -   Comparison Of Onsemi Vs Toshiba Transistor (http://www.diyaudio.com/forums/solid-state/107377-comparison-onsemi-vs-toshiba-transistor.html)

aandy 23rd August 2007 09:47 PM

upto 145v and upto 1.5kw and small hi-fi
i use smt now
i may have some of the to92's in my draws.

some years ago the 970's we tested them for vdc and thay came in at close to 300v
the tosh parts are exceptonaly consistent.

the mpsa are quite unuseable.
andy

fotios 23rd August 2007 09:51 PM

Quote:

Originally posted by aandy
2sc2240 and 2sa970 are much better for audio.

mpsa :smash:

I agree that MPSA are not so good because to achive a rise time of 1,9 žsec (less than by no way) the difference amplifier needs a current of 6mA approx. from the CCS. On the contrary for 2N5401 3mA it is more than enough.
Fotios

aandy 23rd August 2007 09:55 PM

Tosh tended to be conservative with there specks
unlike outher manufactures
andy:)

aandy 23rd August 2007 09:57 PM

When you build a lot of amplifiers you need consistancey
batch to batch
each one the same

fotios 23rd August 2007 10:00 PM

Quote:

Originally posted by aandy
upto 145v and upto 1.5kw and small hi-fi
i use smt now
i may have some of the to92's in my draws.

some years ago the 970's we tested them for vdc and thay came in at close to 300v
the tosh parts are exceptonaly consistent.

the mpsa are quite unuseable.
andy

I ordered from RS components 40 pairs of 2SA970-2SC2240. I believe that these will not be tosh parts. What is your opinion about RS parts? Can i trust these?
Thanks Andy
Fotios

aandy 23rd August 2007 10:09 PM

sorry know idea
i am on holiday from tomorrow and back in 1 week
i could send you a bag if you wish when i am back.
i only use smt now
andy

fotios 23rd August 2007 10:23 PM

Quote:

Originally posted by aandy
sorry know idea
i am on holiday from tomorrow and back in 1 week
i could send you a bag if you wish when i am back.
i only use smt now
andy

Thank you verry much Andy. I am obliged to you for the precious informations. As i understand i can trust 2SA-2SC for +/-70Vdc supply and for Ic as much 3 to 6 mA. When you come back, please contact with me to say me the cost for the bag of parts.
I wish you good holidays "in the sun"
Regards
Fotios

aandy 23rd August 2007 10:41 PM

Sun in the uk:)
rain:bawling:

fotios 23rd August 2007 11:23 PM

Quote:

Originally posted by aandy
Sun in the uk:)
rain:bawling:

Don't worry. The sea it is only 30km far away from my house (3 cigarettes distance with car) and i am sticked hear in my lab because economic liabilities and i am working hardly under continuous temperature of 32 to 45 degree Celsious. We became Africa for whole the summer. No holidays, no vacations to me this year. Maybe the next if all goes well.
BTW i have send my mail via my other account because the present does not responded.
Regards
Fotios


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