BTW , ON bought fairchild !
Will this make Fairchild better , or will all go into the Crapper ?
OS
I thought ONsemi was a sell off from Motorola.
Did Onsemi then buy Motorola?
If I recall correctly Motorola's semiconductor division was basically rebranded to OnSemi, and split off from there.
ON is a spinoff of Motorola.
Motorola is still working for the government.
ON is now what was Motorola , Sanyo , and Fairchild's fabs.
Wow , looking at the ON product listing is getting scary for small BJT's !
I can't find TO-92 in the active listing.
I search "TO-92" and all the 2Nxxxx + BC550/560's say "last shipments".
All the new small BJT's are SOT-xxx . 😱
OS
They might be stopping the ON version than Fairchild version.
If they declare order a 100k units and keep in stock each cost 2cents though.
in the kypton for the output of the VAS im using ksa1381 and 3503 but both are different grades like one beta in 100 range another in 150 so will i be getting some distortion because of this?
Nope , NFB can take care of that.
Input pairs are more important to have similar beta's.
OS
I tried to copy the layout from OS post and here is the results:
It use the same ground technique and basic components placement. It will be for personal use so I hope I didn't do anything wrong.
It use the same ground technique and basic components placement. It will be for personal use so I hope I didn't do anything wrong.
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Exactly! Slowly but surely through-hole is becoming a history right now 😉
Well, after a little bit of practice, SMD is ok for hand-soldering, especially if we don't go below 1206 size with the passive components 😎
smd
Or maybe new boards can be produced with pre mounted SMD parts don' t know if this is economic okay for the small production?
Or maybe new boards can be produced with pre mounted SMD parts don' t know if this is economic okay for the small production?
I have a Luxo on my bench, but hardly ever use it for normal SMD. The parts aren't that small!
Guys: I know we must be progressive but there is much to be said of keeping our projects in the DIY realm. I am not a manufacturer. I have an junk box full of Dale RN60D, 1% resistors that I have been hoarding as well as several hundred TO-92 transistors and I would like to use them and not re-buy almost microscopic resistors. Also if you go to the trouble of matching SOT transistors, handling them with tweezers between fumble fingers, glueing their flat faces together to control thermal drift in a matched diff amp pair seems to me rather difficult. I guess you could glue a piece of thermal conductive aluminum from SOT to SOT. I will probably only build another one set of amps in my life being now 68 years old, so delving into surface mount at this stage in my life is where I don't want to go. I have the thru hole spooky boards and will live with that. Ray
Dual devices are available in a single package, so no matching/ bonding is required. They've already done the work for us. The problem we are having with through hole parts is many aren't available any more. Unless you happen to be hoarding old devices, you can't build with them any more. The SMT parts are cheap, easily available and actually superior to through hole devices, so it only makes sense to use them.
