Just a little FYI... I bought 60 transistors with some other stuff I couldn't get from Tayda. All the HFE's were lower than you would expect. I think they must have bought rejects. For me it's ok, I expected most to be low after Chris B posted his findings in another thread but figured some people may find this info useful.
BC109C ON brand Hfe's 77 to 190
BC107's Motorola 75-90 3 unmarked brand 225- 250
BC184 ITT 280-320
Futerlec Transistors
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Seiche
- Old Solderhand
wow the BC109C are sucky low. would probably make good fuzz transistors thoughmojah63 wrote:Just a little FYI... I bought 60 transistors with some other stuff I couldn't get from Tayda. All the HFE's were lower than you would expect. I think they must have bought rejects. For me it's ok, I expected most to be low after Chris B posted his findings in another thread but figured some people may find this info useful.
BC109C ON brand Hfe's 77 to 190
BC107's Motorola 75-90 3 unmarked brand 225- 250
BC184 ITT 280-320
Are you sure the battery in your DMM isn't drained? Happened to me the other day and it measured a bunch of BC547s as well below 200-300 (about the range of all your transistors combined), when they actually were well over 500-600!
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PokeyPete
- Resistor Ronker
Only the BC109C seems low to me. The other two are right at mid range, just what you would expect.mojah63 wrote:Just a little FYI... I bought 60 transistors with some other stuff I couldn't get from Tayda. All the HFE's were lower than you would expect. I think they must have bought rejects. For me it's ok, I expected most to be low after Chris B posted his findings in another thread but figured some people may find this info useful.
BC109C ON brand Hfe's 77 to 190
BC107's Motorola 75-90 3 unmarked brand 225- 250
BC184 ITT 280-320
“No man is so foolish but he may sometimes give another
good counsel, and no man so wise that he may not easily err
if he takes no other counsel than his own. He that is taught
only by himself has a fool for a master.”
–Hunter S. Thompson
good counsel, and no man so wise that he may not easily err
if he takes no other counsel than his own. He that is taught
only by himself has a fool for a master.”
–Hunter S. Thompson
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mojah63
- Breadboard Brother
I don't use my DMM hfe checker anymore. It always reads 15 to 22% higher (and the error is not linear in respect to hfe ranges) than using RG Keen's circuit. I use a traceable DMM at the lab were I work with a traceable power supply and set the resistors to exactly the values. Plus I can do leakage checks on germs. I expected lower gains from them and got them so I'm ok with it. I need some lower hfe's to build some Fuzz Faces anyway. Just wanted to let some others know in case they expect to get a BC109C at or near spec. I did expect more of the unsorted 107's to be higher, yeah the 184's are good though.