Maker Pro
Maker Pro

Mimimum base current for 2N3055

P

Phil Allison

Jan 1, 1970
0
"John Larkin"
"Phil Allison"
Don't you have a broken casette player or something to fix?


** Do you have any real life at all ?

( Blatantly rhetorical question )

Larkin is an incorrigible troll feeder and public cocksucker of any poster
who laps up his crapology.

Wot a fucking pathetic way to publicly bloat an already monstrous ego.

What a fucking puke.




..... Phil
 
J

Jamie

Jan 1, 1970
0
Phil said:
** You are fully a fuckwit and a troll.

Learn to write English properly or else **** OFF !!!!



.... Phil

Phil is a perfect example of english etiquette, he's got the
colorful metaphors of english down pat!

Jamie
 
G

George Herold

Jan 1, 1970
0
"George Herold"
 "Phil Allison"










Well OK, I've been using these TIP31/32 's in to220 pacs as temp
sensors, diode conected transitors.  At 10nA of collector current the
ideality is starting to fall off, 100nA looks OK.  I figured a higher
power BJT might be 'good' to 1uA.
** So you just fucking guessed.

    How typical for this NG.

Yeah sorry that was what the 'probably' was meant to convey.
I’ll try to be more specific next time.
I tend to ‘guess’ at a lot of stuff, but I try to indicate when I’m
doing that.
** Hundreds of them.

FYI:

I just tested a vintage 1983 MJ802.

With 1uA base current, Ic = 4uA

With 100uA base current , Ic = 1.8 mA

With 4.5mA base current, Ic = 0.6 A

Nice, thanks for the numbers.
I had no idea it was that bad at low currents.

George H.
 
P

Phil Allison

Jan 1, 1970
0
"John Larkin"
"Phil Allison"
Some of those big old Moto parts had a lot of leakage currents, so the
actual
HFE might be less than apparent.


** The tester I used then applied a 1uA current to the base while monitoring
the collector current with a 1mA meter, DC supply was from a 9 battery.
There was simply no meter deflection until the base current was applied via
a push button switch.

The particular unit was intended for SS transistors any generally gave low
and misleading readings for TO3 devices and no reading at all for TV
horizontal output transistors. So I designed a simple tester to cover TO3s
where the user adjusted the base current so Ic became 0.5 amps and read the
Hfe value from a scale around a pot. The correct test condition was
indicated by getting two red LEDs to go out.

One could also test the Vbe by reading the B-E drop at the same time -
important for good current sharing in parallel BJT output stages.


.... Phil
 
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