Metropoulos Forum

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

anybody ?

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.

Sweet Stuff!
http://www.cde.com/catalogs/WMF.pdf

most kool !
thanks for the leg work on that.

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.

~Jimmie

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

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

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

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

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.

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.

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.