Without a circuit description, it's only speculation.thekid777 said:Trying new BC109C (CDIL and SEMI)
neither are sounding as good as the old ones from the 70's
Bad tone, less density, strange...
would you have any suggestions?
thanks
Did you use solder from the 70's?thekid777 said:Trying new BC109C (CDIL and SEMI)
neither are sounding as good as the old ones from the 70's
Bad tone, less density, strange...
would you have any suggestions?
thanks
These questions are not taboo but in the absence of any real information it is very hard to provide a sensible and useful answer. There are many designs where differences in active components like transistors can be heard and also many designs where it cannot be heard. Unless we know which design you are talking to it is not really possible to make suggestions. If you can post a schematic then it may be possible to help you but saying 'all is technically correct' is not really much help.thekid777 said:To answer abbey road d'enfer, yes all is fine with the technical side of things,
it is just obvious to me something is different with the tr.
These kind of questions seems like a taboo on this forum, where most prefer to talk numbers only.
Ok! I'll pass and do my own!
Thanks
They are not "taboo". The point is, if you want help, we must be on the same level of understanding.thekid777 said:These kind of questions seems like a taboo on this forum, where most prefer to talk numbers only.
Is this a guitar circuit then? Many of those have characteristics that depend strongly on the components used. Why don't you just post a schematic?thekid777 said:Thanks guys for your contributions
I definitely think I should have asked that on a guitar forum ;D
thekid777 said:Trying new BC109C (CDIL and SEMI)
neither are sounding as good as the old ones from the 70's
Bad tone, less density, strange...
would you have any suggestions?
In my judgement I would not expect much luck speculating about how a semiconductor would "sound" from looking at it even with a microscope. Back in the 60s as a technician I would routinely grind the top cover off of metal power transistor to do failure analysis. Melted base leads or collector-emitter voltage punch throughs could be visible.living sounds said:You can send some examples of old and new transistors to this guy and he will make a photographic analysis:
https://groupdiy.com/index.php?topic=76526.0
Probably much more useful for ICs than transitors though.
JohnRoberts said:In my judgement I would not expect much luck speculating about how a semiconductor would "sound" from looking at it even with a microscope. Back in the 60s as a technician I would routinely grind the top cover off of metal power transistor to do failure analysis. Melted base leads or collector-emitter voltage punch throughs could be visible.
I have never had much luck opening up plastic transistor packaging without destroying the device. About the only thing you might determine visually is that the transistor die is the correct one. Back in the day, semiconductor makers would document the different transistor families and expected performance.
JR
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