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Power supply question

P

Phil Allison

Jan 1, 1970
0
"klem kedidelhopper"
If you have done this and gotten 36 volts, then you actually have a
48V transformer with CT>

Jamie

What you're referring to is a 12VCT transformer. Connecting either a
bridge and not using a center tap or just two diodes across the full
secondary with cathodes tied together using CT as common connected to
an output filter will yield 18VDC.


** Fucking BULL SHIT !!!!!!!!!!!!!!

I've tried it and it does


** Then explain how every other person on the planet get a different result
??

Using a CT as common halves the voltage from the tranny and so halves the DC
voltage as well.

My god you are fucking stupid.



..... Phil
 
J

Jamie

Jan 1, 1970
0
klem said:
What you're referring to is a 12VCT transformer. Connecting either a
bridge and not using a center tap or just two diodes across the full
secondary with cathodes tied together using CT as common connected to
an output filter will yield 18VDC. A 24 V transformer under the same
circumstances will produce 36VDC. I've tried it and it does. Lenny.

absolutely not, you are greatly mistaken or you don't know what you have
for a transformer.

THe transformer is spec'ed out via its outer legs, the highest
voltage. The CT is the voltage divider. when you use the CT as your
common, the supply will yield only half of the rated voltage of that
transformer and is when you use only 2 diodes from the outer legs to
form a full wave into a single node where this becomes the (+) terminal.


With a real 24V Transformer with CT and using the CT as your common
(-) terminal, you will get 12*1.414 = 16.968-0.650 = 16.318VDC at the
peak of a marginal ripple.


You have your logic mixed up

Jamie
 
K

klem kedidelhopper

Jan 1, 1970
0
absolutely not, you are greatly mistaken or you don't know what you have
for a transformer.

   THe transformer is spec'ed out via its outer legs, the highest
voltage. The CT is the voltage divider. when you use the CT as your
common, the supply will yield only half of the rated voltage of that
transformer and is when you use only 2 diodes from the outer legs to
form a full wave into a single node where this becomes the (+) terminal.

   With a real 24V Transformer with CT and using the CT as your common
(-) terminal, you will get 12*1.414 = 16.968-0.650 = 16.318VDC at the
peak of a marginal ripple.

   You have your logic mixed up

Jamie

What I decided to do is use the full secondary and employ the two 6.8V
zeners in series with the cap. That arrangement gives me 21V out of my
power supply to feed the 12V regulator. As far as I can tell the other
methods would be using the center tap and one side of the transformer,
a method which I didn't want to use. I tried this full secondary
arrangement with a 1.2A load and the 21V across the zeners holds
pretty steady. I have a nice heat sink for the two diodes, (they will
be insulated) that will be going into the box as well. Thanks everyone
who advised and helped me on this project. Lenny
 
P

Phil Allison

Jan 1, 1970
0
"klem kedidelhopper"

What I decided to do is use the full secondary and employ the two 6.8V
zeners in series with the cap. That arrangement gives me 21V out of my
power supply to feed the 12V regulator.


** He sure is one stubborn SOB - ain't he?




..... Phil
 
P

Phil Allison

Jan 1, 1970
0
"Arfa Daily" >
"Phil Allison" >>

Well, as long as it works ok for him, and he understands it, I guess it's
a result in the end ...


** All the fool had to do was LOOK at his wiring and spot the mistake.

The CT wire was swapped with one of the ends.

FFS, what a annoying moron.
 
J

John-Del

Jan 1, 1970
0
Phallus'n wrote:

** He sure is one stubborn SOB - ain't he?


.... Phil

Snort.... No one is more stubborn than Phallus'n. No one. Phil stubbornly hangs on to an argument when he's been long proven wrong. His stubbornness is so well known in fact that he was given a guest cameo on a sitcom. He's the one on the right. Enjoy:

 
J

josephkk

Jan 1, 1970
0
What you're referring to is a 12VCT transformer. Connecting either a
bridge and not using a center tap or just two diodes across the full
secondary with cathodes tied together using CT as common connected to
an output filter will yield 18VDC. A 24 V transformer under the same
circumstances will produce 36VDC. I've tried it and it does. Lenny.


Two questions:

Do you have LTSpice?

Can you read alt.binaries.schematics.electronic?

If the answer in no in both cases, get LTSpice.

The .asc files are very handy for this kind of discussion.

?-)
 
J

John-Del

Jan 1, 1970
0
But when he's right, he's right. And in this case, he is ...



Arfa

That's not the point.. Phil chides the OP for being stubborn, but all one could accuse him of is being wrong.

I guess it's the internet bullying that makes Phil such a dick, and I'm sure he's a bigger tool in person. Would he act out in such a manner if he was standing directly in front of the OP? I doubt it. Over the years, I'vediscovered that most bullys are spineless, who hide behind a false facade of toughness (until called on it), or behind a keyboard.

If I knew that Phil acted the same way in person as he does on the internet, I might even like the guy, and buy him a beer (after pounding the snot out of him). But I'd bet almost anything that if challenged, he'd run home to mommy and hide in her basement.
 
P

Phil Allison

Jan 1, 1970
0
"John-Del" = FUCKWIT TROLL
But when he's right, he's right. And in this case, he is ...


Arfa

That's not the point.. Phil chides the OP for being stubborn, but all one
could accuse him of is being wrong.


** Completely and utterly WRONG !!!

PISS OFF TO HELL

- YOU RETARDED FUCKING NET STALKER



.... Phil
 
J

John-Del

Jan 1, 1970
0
"John-Del" = FUCKWIT TROLL





That's not the point.. Phil chides the OP for being stubborn, but all one

could accuse him of is being wrong.





** Completely and utterly WRONG !!!



PISS OFF TO HELL



- YOU RETARDED FUCKING NET STALKER
.... Phil

I guess you don't have a clue, but the few people who are left reading thisgroup (strange drop off in traffic since you've been here) think you're a dick. You know, you might be able to get just a tiny bit of respect from usenet people if you had just a bit of cleverness to your bile, or could at least back it up with something more than anonymous internet sniping.

Do you act like this in person? If you're ever on the east coast of the U.S. for any reason, let me know.
 
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