VOLTAGE REGULATORSSorry for the delay ! Been busy in the house doing other things.
Didn't you find any TO-3 ones with a "K" suffix? The LM323K is 5V 3A, for instance. The LM7812K is rated for 1.5A.
Oh not I am confused again... the datasheet I have for the "vanilla" L79XX , no suffix then, says it can do 1.5A. So I though the standard/default current output for a 78/79 was 1.5A, then suffixes would make that vary up or down.
The LM7812K is rated for 1.5A.
LM7812K I just downloaded the, well, 'a' datasheet (attached below) and it says 1.0A not 1.5 ?!
Confused even more now !
Oh dear... it's really a shit show these regulators... I think what I will do is simply consider they are all 1.0A so as to be on the safe side !
So you have neither LMx09 nor LMx40 regulators? And neither LMx17, x37, x50 nor LMx38?
Oh yes I have some of those !
- I have one LM340 5V TO220.
- LMx09 I have 3 big ass TO3 LM309K 5Volts ... but only 1.0A the datasheet says
You realize how old these dinosaurs are when you see the datasheet on the first page says they are "compatible with DTL logic " !!
Also have a couple ancient SFC2309, TO3 1Amp 5Volts.
- LMx40 I have a TO3 LM340K, but still limited to 1.0A
Looks like most of these TO3 variant didn't give you more current, only more power dissipation which back in the day was welcome because often they didn't care and just put 25 or :palm:30Volts in to get 5V out !
- LMx38 I have one TO3 338K. Looks like a beefy LM317... adjustable positive, 1.2V to 30+ volts..... 5A !!!
That's lab power supply in itself !
Just need to add a transformer, bridge rectifier, filter caps, and a pot and that's it
- LM317/337 : only 1.5 this one, prefer the 338K !
.... but 317 is available in T0220 so more practical if you don't need the 5amps...
I have x3 317. One TO3 and two TO220. But I have no 337/ negative adjustable.... plenty of fixed negative thought, so I could always "hack" those to get whatever voltage I need, I guess....
- x50 ? That does not ring a bell... what would be valid / full part number for example ? Fixed voltage ? Adjustable ? Low current ? High current ?
And an LT1070 should also be at hand when needed! Vince, you really need to round out your collection!
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Doesn't sound familiar either... maybe these were not wide spread 30 year ago when I was a kid and garnered the rudiments of electronics I am now trying to grow...
Let me see what that is.... OK... a switching regulator, that's a whole different topic !
3V to 60V at the input, boost converter... internal switching transistor can do 5Amps... doesn't need a lot of external components.... hmm yes sounds like a very flexible / versatile little device, might be good to have a few in stock indeed !
I don't have any or almost no switch mode regulators. Found half a dozen in my salvaged pile, but 5 of them were too "TV" specialized to be reused, realistically. so I kept only one that looked general purpose enough, a KA1H0165R.
I bought some old TL494 or something 5 years ago because I needed them to fix the SMPS that blew iun my Tek 2232 scope, ahem....
So yeah, I would say I have zero modern switching regulators.
Might find a few in the pile of scrap boards that I have yet to process. Many from modern(is consumer appliances, flat TV or what not. Maybe these have general purpose switching regulators I could reuse. We shall see....
OH !!! Just remembered something, I have more regulators hiding somewhere ! 30 years back the old man bought me some parts so I could build my own power supply... a nice extruded aluminium case, a couple 4 digit reflective LCD display and the ICL chips to drive them, pots, a nice big ass toroidal transformer... I kept all these parts together, inside the case, to make sure I don't lose them. So I just dug out that box and sure enough all the parts are still in there 30 years later !
So let's see what I have got exactly there.... hmmmm..... FOUR TO3 LM317K !!!
... and a TO3 LM323K that AVG mentioned, so I DO have one then in fact, yeah ! OK let's add these to my inventory / spreadsheet...
Thanks for reminding me about the S series. There's at least one still missing from the list however - the L200!
Oh yeah that one does ring a bell ! 30years ago my dad invited me at his workplace so I could do some experiments with this regulator. He would make me do experiments with BJT's too, to learn the basics, before my class mates saw it at school. I was always ahead of them
Yes, the L200...
I think it didn't get used a much as the LM317 because its minimum output voltage quite high, 2.85V versus only 1.25V for the LM317...
At least, I've sent him two Tesla MAA723H.
Tesla what ?! I thought they made cars ?!
No that wasn't me ! You sent me a bunch of 709 op-amps....
(running to the bench to check them)... OH !!!!!
The two cans that have a yellow dot instead of the red dot all the others have.... they are NOT 709 they are these Tesla 723 !!!
Oh my bad ! You sent me even more stuff than I had realized !!:
Google found me the datasheet for them but it's written in some funky language I just can't understand. Eastern European country maybe.... I don't know
I guess it's a 723 voltage regulator then... with special specs ?
I think I might have some 723 in DIP package in the old stock the old man gave me. It was popular back then, it's the kind of IC he would probably have had in his stock... I don't know for sure though, as I have yet to sort all my IC's ! I have done the passive components, now discrete semiconductors almost done (still have to sort lots of beefy diodes). Then I will soon move on to sorting all the IC's...