Wanted your help for a list of transistors

mcmahon48 · 19th February 2009, 08:19 AM

I would like to know what transistors would a hobbyist need for amps, fm transmitter, fm receiver, power supplies that would be the most useful assortment.

ostripper · 19th February 2009, 12:34 PM

Hi, mcmahon... here are some inexpensive devices I have had good luck with...

Input stages / general small signal amplification (to-92)..
BC556/546 good for little amps (60v) 2sc1845/2sa992 (100v)
bigger amps - and ksa 92/94 (300v). all have Ft of 100mhz+
and Cob of 2-6pf (fast devices) making them useful for just
about anything as well as being cheap ,$.09 to .15 apiece

.

Drivers/ medium power devices .. (to-126/220)
MJE 340/350 - good general purpose high voltage devices,
a little slow , but widely available.
Ksa-2sa/c.. 1381/ 3503 .. killer VAS devices...
MJE 15032/33 - 2SC4793/2sa1837 ...drivers, 2sc/a's are faster.

Power devices - (to-3 / to-3p)

Mjl4281_4302 / njw0281-0302 /Mj15022-25
njw0281-0302 are real cheap $1.40 ...
FJL/P fairchild devices are available ,too..
Everybody seems to have a preferance , but I have noticed
output device choice has little effect on sound.

Most are available from Mouser , MCM , parts express.
Local distributers and Radio shack suck , more expensive
floor sweepings... garbage..
OS

CBS240 · 20th February 2009, 12:03 AM

Quote:

Local distributors and Radio shack suck , more expensive
floor sweepings... garbage..
OS

Hi

I quite often use RS's vero-boards and accessories for proto-typing.

It depends on what level of "hobbyist" you intend to be. I use a lot of SMD parts, they are good quality and generally cheap.

You can easily use SOT-23 and 0603 size components with the vero-board. It takes a steady hand though.

Some of my circuits (ex 1, ex 2, ex 3, ex 4) have a few more parts than most here would tolerate, but to each his own.

A small assortment of small signal J-fets wouldn’t be a bad order either.

KSA2690/KSC1220 are useful as drivers, or maybe VAS........cascode. Their cost efficient too.

I can vouch for the THAT corp. matched transistors arrays, THAT 200/320/340 if you can sling the price.

Mostly, have fun!

mjf · 20th February 2009, 09:26 PM

hello.
some standards:
bf244b (or bf245b)
2sk170/2sj......
irf610/irf9610
tip141/tip146
2n3055/mj2955
bc639bc640
bd139/bd140
bd 243/bd244
and so on...............
greetings.......

19th February 2009, 08:19 AM	#1
mcmahon48 diyAudio Member Join Date: Aug 2008	Wanted your help for a list of transistors I would like to know what transistors would a hobbyist need for amps, fm transmitter, fm receiver, power supplies that would be the most useful assortment.

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19th February 2009, 12:34 PM	#2
ostripper diyAudio Member Join Date: May 2008 Location: Albany , NY (smallbany)	Hi, mcmahon... here are some inexpensive devices I have had good luck with... Input stages / general small signal amplification (to-92).. BC556/546 good for little amps (60v) 2sc1845/2sa992 (100v) bigger amps - and ksa 92/94 (300v). all have Ft of 100mhz+ and Cob of 2-6pf (fast devices) making them useful for just about anything as well as being cheap ,$.09 to .15 apiece . Drivers/ medium power devices .. (to-126/220) MJE 340/350 - good general purpose high voltage devices, a little slow , but widely available. Ksa-2sa/c.. 1381/ 3503 .. killer VAS devices... MJE 15032/33 - 2SC4793/2sa1837 ...drivers, 2sc/a's are faster. Power devices - (to-3 / to-3p) Mjl4281_4302 / njw0281-0302 /Mj15022-25 njw0281-0302 are real cheap $1.40 ... FJL/P fairchild devices are available ,too.. Everybody seems to have a preferance , but I have noticed output device choice has little effect on sound. Most are available from Mouser , MCM , parts express. Local distributers and Radio shack suck , more expensive floor sweepings... garbage.. OS

20th February 2009, 09:26 PM	#4
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	hello. some standards: bf244b (or bf245b) 2sk170/2sj...... irf610/irf9610 tip141/tip146 2n3055/mj2955 bc639bc640 bd139/bd140 bd 243/bd244 and so on............... greetings.......