CAPS!!!!!!!!

[nero1985]

hi, i need a 2.2mf electrolityc cap but i have in have 2 x 1mf and a 0.1mf caps, u think i could wired them in series or parallel to get 2.1mf at least???

[strungout]

FAQ FAQ FAQ (the DIY one that is).

[puretube]

take two 1µF parallell = 2µF, and forget about those 10%....

[Peter Snowberg]

Sure, just put the in parallel.

The normal tolerance for electrolytics is -20% to +80% of the rated value so just using two 1uF caps in parallel would be just fine.

If you put two 1uF caps in series, you will get 0.5uF as a result, but the voltage rating will be twice as high.

[Peter Snowberg]

Hehehehehe....

No answer for two minutes and then all the sudden three answers in the same minute.  :lol:  

[puretube]

...THROUGH ZERO POSTING...  

[nero1985]

thanx!!!!!!!!!!!!

[Peter Snowberg]

...THROUGH ZERO POSTING...  

:lol:

Does that mean that with the correct timing you could actually post the answer before the question was posted?

Maybe only the highest pitch phonemes would make it through the posting.

[puretube]

nah, you`ll need a little pre-delay (though 2 minutes is far too long).

but maybe "in the mix" you`ll get some pre-echo like on Whole Lotta Love

:lol:

[David]

...THROUGH ZERO POSTING...  

:lol:

Does that mean that with the correct timing you could actually post the answer before the question was posted?

Maybe only the highest pitch phonemes would make it through the posting.

Hmmm...  Peter's been watching Stargate SG-1 while listening to Hawkwind again, eh?   :lol:  :lol:  :lol:  :lol:

[Peter Snowberg]

Space is dark, it is so endless
When you're lost it's so relentless
It does not feel, it does not die
Space is neither truth nor lie
Is this the reason, deep in our minds?

It does not feel, it does not die
Space is neither truth nor lie
Into the void we have to travel
To find the clue which will unravel
Is this the reason, deep in our minds?

The secret lies with our tomorrow
In each of us is a hidden sorrow
The path goes onwards through the night
Beyond the realms of ancient light
Is this the reason, deep in our minds?

Now to fix that flakey dialer.....

[bioroids]

If you put two 1uF caps in series, you will get 0.5uF as a result, but the voltage rating will be twice as high.

It really doubles the voltage rating?

[David]

Space is dark, it is so endless
When you're lost it's so relentless
It does not feel, it does not die
Space is neither truth nor lie
Is this the reason, deep in our minds?

It does not feel, it does not die
Space is neither truth nor lie
Into the void we have to travel
To find the clue which will unravel
Is this the reason, deep in our minds?

The secret lies with our tomorrow
In each of us is a hidden sorrow
The path goes onwards through the night
Beyond the realms of ancient light
Is this the reason, deep in our minds?

Now to fix that flakey dialer.....

Oh, no!  He's waxing poetic!  Quick!  Get the accountants in here!

[Hal]

If you put two 1uF caps in series, you will get 0.5uF as a result, but the voltage rating will be twice as high.

It really doubles the voltage rating?

yup.

4 caps of a voltage = one cap of double the voltage, 2 paralell, 2 series.  You can think of it as each cap "dropping" half the voltage when in series, even though thats not quite what happens if i understand correctly.

[Peter Snowberg]

It really doubles the voltage rating?

Yes .

If you put two 1uF/50V caps in series you end up with a 0.5uF/100V cap as a result.

If you run lots of power through it you do end up with balancing problems because the caps are not PERFECTLY identical. In low voltage stompboxes this is not a problem but with tube amp power supplies it can be.

If you look at lots of tube amp schematics you will commonly see this trick used for the first cap in the B+ supply because that position sees some VERY high transient voltages. You will also notice that each cap is in parallel with a resistor (ususally 220K-470K). Those resistors bleed off the current when the power is removed but more importantly they help the caps to share the load a little easier when the amp in running.

David,

The accountants already sunk their teeth into that one long ago. Check out Hawkwind's "DOREMI FASOL LATIDO" album.

[puretube]

2 caps in series = 2 times the distance ("allowable voltage") between the cap-plates...

[bioroids]

Great, this also works when using two electrolitics in series to make a non-polar capacitor?

Luck!

Miguel