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| Jellybean hobbyist general purpose transistors.. |
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| Brumby:
Let's get in early for the future....! How about: Band nameAbbreviationITU band numberFrequencyWavelengthExtremely low frequencyELF13–30 Hz100,000–10,000 kmSuper low frequencySLF230–300 Hz10,000–1,000 kmUltra low frequencyULF3300–3,000 Hz1,000–100 kmVery low frequencyVLF43–30 kHz100–10 kmLow frequencyLF530–300 kHz10–1 kmMedium frequencyMF6300–3,000 kHz1,000–100 mHigh frequencyHF73–30 MHz100–10 mVery high frequencyVHF830–300 MHz10–1 mUltra high frequencyUHF9300–3,000 MHz1–0.1 mSuper high frequencySHF103–30 GHz100–10 mmExtremely high frequencyEHF1130–300 GHz10–1 mmTremendously high frequencyTHF12300–3,000 GHz1–0.1 mm Ridiculously high frequencyRHF3–30 THz100–10 μmFantastically high frequency F***ing high frequencyFHF30–300 THz10–1 μmObscenely high frequency ** Optically high frequencyOHF300–3,000 THz1–0.1 μmPreposterously high frequencyPHF3–30 PHz100–10 nm ** Covers visible light |
| spec:
--- Quote from: Vtile on October 12, 2017, 11:28:44 pm ---I have started to think that I stock a few hundred general purpose through hole transistors (an investment of a few tens of bucks). To be sure I will have them to tinker around as to me it seems that the jellybean variety is vanishing or vanished already from THTs. I'm mostly thinking of small signal, low freq (<200MHz), throw in buffer etc. general purpose uses of tinkering and maybe slobby repair or hack here and there. BJTs: BC547B(npn) & BC557B(pnp) comes to my mind. Is there other worth to look that are still readily available. Darlington models to maybe look at? . JFET Is there cheapish (<$0.50 ) replacement for 2n4117 other than mbf4117(smd). It seems to be pretty alone in fart detector range. MOSFET For logic level switching use. Any ideas, in leds/signals on/off range of power. Should be also as robust as possible for ESD and ideally should have the protective diodes. 2N7000 ?? or were it JFET&BJT hybrid, hmm. Known matched pairs (for that random differential stage) that wouldn't cost arms and legs and could still be found as THTs. ..none or should I look from IC listings.. Any other than TO-92 cases to look at for jellybean THT parts. Metal cans seems to be premium only now. --- End quote --- Hi Vtile This is my list of complementary goto jellybean BJTs: BC546C/BC556C : 65V, 100mA, 500mW, TO92 (plus clip-on heat sinks) BC337-40/BC327-40 : 45V, 500mA, 625mW, TO92 (plus clip-on heat sinks) TIP41C/TIP42C : 100V, 6A, 65W, 2degCW, 150degC TO220 (plus clip-on heat sinks and heatsink mounting kits) TIP35C/TIP36C : 100V, 25A, 125W, 1degCW, 150degC TO247 (plus clip-on heat sinks and heatsink mounting kits) 2N3055/MJ2955 : 70V, 15A, 115W, 1.52degCW, 200degC, TO3 (You just have to have these old work-horses, but only the revised HF type [epitaxial base] :)) The clip-on heat sinks are handy, to get you out of the situations where you want the performance characteristics of a smaller transistor, but slightly exceed the bare case dissipation (BC337/BC327 especially). For the bigger transistors the heatsink clips often eliminate the need for a full-blown heatsink. |
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