|Solid State Talk all about solid state amplification.|
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|19th February 2009, 08:19 AM||#1|
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.
|19th February 2009, 12:34 PM||#2|
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..
|20th February 2009, 12:03 AM||#3|
Join Date: Aug 2005
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!
All the trouble I've ever been in started out as fun......
|20th February 2009, 09:26 PM||#4|
Join Date: Jan 2009
bf244b (or bf245b)
and so on...............
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