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Some quick transistor suggestions
Some quick transistor suggestions
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Old 26th April 2002, 02:16 AM   #1
alvaius is offline alvaius  Canada
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Default Some quick transistor suggestions

Any good suggestions for 40-60V audio NPN transistors, few 100mA iC, 1 watt of so power dissipation. To be used in output stage of class-A pre-amp. Good quality, but also something I can get my hands without too much difficulty [where to buy would be very much appreciated]. Been out of the high quality side of the analog word for a while so any and all suggestions are welcomed.

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Old 26th April 2002, 10:11 AM   #2
djk is offline djk
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The Motorola (ON) MJE200/210 are Ft=65Mhz at 100mA with a gain of 100 up to about 1A and 1.5W ambient or 3W on a sink 40V. The MJE243/253 are similar, 100V, gain of 50, Ft=40Mhz.
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Old 26th April 2002, 11:04 AM   #3
peranders is offline peranders  Sweden
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Some quick transistor suggestions
BD139, BD140 are classical transistors

1A, 80V, fT 100 MHz, 5-20W (don't exactly), cheap, common (in Europe).

BF471, 472 video transistors, 300V, fast ones, also good. Check my monster headphone amp QRV-01. I use them in the cascodes.

/Per-Anders (my first name) or P-A as my friends call me
Group buy: DCT03 DC trap for big toroidal transformers. Sign up for interest HERE. 27 pcb's in interest.
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