0.68μF 600v Any good?

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JimiJames
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0.68μF 600v Any good?

Post by JimiJames » Thu Mar 06, 2014 10:46 am

Curious what composite are these ? Poly? Could I use them like the 160v Mustard? What to expect?

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Re: 0.68μF 600v Any good?

Post by JimiJames » Mon Mar 10, 2014 1:44 am

anybody ? :shock:
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Re: 0.68μF 600v Any good?

Post by danman » Mon Mar 10, 2014 12:20 pm

If you are planning to use it as a cathode bypass cap like in a Marshall circuit you will be fine. There isn't alot of voltage there on the cathode.

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Re: 0.68μF 600v Any good?

Post by ezs » Tue Mar 11, 2014 4:54 pm


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Re: 0.68μF 600v Any good?

Post by JimiJames » Tue Mar 18, 2014 6:03 am

most kool !
thanks for the leg work on that. 8)
danman wrote:If you are planning to use it as a cathode bypass cap like in a Marshall circuit you will be fine. There isn't alot of voltage there on the cathode.
These would be for a frankenbuild and just wanted to know if these could be used in a pinch; and I see if it meets the ratings it should work just fine....

Yes... I see that the Mustard's are 160v and I was curious if the higher voltage rating had an effect.
As long as it's 160v or more seems to be A.O.K.

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Re: 0.68μF 600v Any good?

Post by emmjaydubya » Mon May 19, 2014 10:52 pm

Found these a while back if you're interested, I've dealt with the seller several times. Not the cheapest caps but proven to sound great:

http://www.ebay.co.uk/itm/1x-NOS-WIMA-T ... 232d2cb366

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Re: 0.68μF 600v Any good?

Post by Skippy » Tue Jul 22, 2014 10:09 am

Out of interest... can a 120v .68 mustard be used as a cathode bypass cap or does it need to be 160v min?

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Re: 0.68μF 600v Any good?

Post by neikeel » Tue Jul 22, 2014 10:59 am

Skippy wrote:Out of interest... can a 120v .68 mustard be used as a cathode bypass cap or does it need to be 160v min?
It'll be fine - no voltage to mention on the preamp cathodes
Neil

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Re: 0.68μF 600v Any good?

Post by Carbia » Sat Jul 26, 2014 4:28 pm

Yes, the cathode voltage there is around 1 or 2 volts. Every cap can be used

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Re: 0.68μF 600v Any good?

Post by demonufo » Sun Aug 24, 2014 4:57 pm

As for the 600V, whilst it will be fine, the higher voltage rating may make a very appreciable difference in that position. A 600V cap will have a massively higher Equivalent Series Resistance over a 160V cap, which will almost certainly make an appreciable difference on this particular cathode where only a few volts are present, in operation at least. Whether or not it is for the better or worse is all personal preference though. The difference in ESR however may not even be particularly perceivable to the ear, as cathode cap types seem to have a far lesser effect than the couplers.
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Re: 0.68μF 600v Any good?

Post by Haze13 » Tue Sep 02, 2014 6:49 am

Caps that worth spending money on are: 22nf in the Pre and Pi sections; 100nf that connected to the grid of the PI tube from the Negative Feedback. Others can be any thing you want, but with good tolerance and long life => less electrolytics as you can.

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Re: 0.68μF 600v Any good?

Post by Joshabr1 » Tue Sep 23, 2014 1:53 pm

demonufo wrote:As for the 600V, whilst it will be fine, the higher voltage rating may make a very appreciable difference in that position. A 600V cap will have a massively higher Equivalent Series Resistance over a 160V cap, which will almost certainly make an appreciable difference on this particular cathode where only a few volts are present, in operation at least. Whether or not it is for the better or worse is all personal preference though. The difference in ESR however may not even be particularly perceivable to the ear, as cathode cap types seem to have a far lesser effect than the couplers.
W

Very true. Great point.

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