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I think there may be some misinformation (unintentionally) sneaking into this thread regarding the Mundorf Silver & Oils.
I spoke to the store that I purchased mine from and am reassured that the specs on these caps state 70 Degrees
I'll have a PDF soon, and I'll post it here
Ian.
Don't worry, waiting and you will see.
I replaced all the silver oil capacitors on my tube amplifiers due a failure in less than 200h. A friend who have a commercial brand of tube amplifiers (In the past with Silver/Oil), he had to change all the capacitors of the silver oil series by the same reason (A high cost operation due the warranty and shipping).
But I'm using a Silver Oil in a Pass B1 with nice results and zero problems (by the moment)
Here we go
The retailer I used has told me, he has sold a a lot of these and never had a complaint to date.
Ramallo, I'm not questioning your experience, and I have no answer to why you had this experience, I looked into this as I wanted to be sure...for myself, and I'm resting easier now and will not be changing my caps
The retailer I used has told me, he has sold a a lot of these and never had a complaint to date.
Ramallo, I'm not questioning your experience, and I have no answer to why you had this experience, I looked into this as I wanted to be sure...for myself, and I'm resting easier now and will not be changing my caps
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I had Mundorf SIO in my EL34 SET amp for 5-6 years, they did fine but were slightly buldged out after that time, didn't measure them.
I got some RelCap PCU copper foil caps at 1/2 price from partsconnexion for my preamp, they are really nice. I tried them next to some Solen MKPs and the difference was not subtle, the RelCaps were much better.
I got some RelCap PCU copper foil caps at 1/2 price from partsconnexion for my preamp, they are really nice. I tried them next to some Solen MKPs and the difference was not subtle, the RelCaps were much better.
My opinion on coupling caps is that certain inexpensive high quality polyester ones are all you need for most pre-amp or phono
If you believe your design is good, but feel the need to spend more of your money to make it sound better, then Duelund Alexander are DECENT.
If you think you need the Duelund CAST then why not save your money and design for transformer coupling instead? Transformer coupling might actually takes up LESS space than CAST...
Ian
If you believe your design is good, but feel the need to spend more of your money to make it sound better, then Duelund Alexander are DECENT.
If you think you need the Duelund CAST then why not save your money and design for transformer coupling instead? Transformer coupling might actually takes up LESS space than CAST...
Ian
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In my experience, if the design is well considered, the cheapest Mundorf's sound best.. almost as good as certain cheap polyester's.
russian teflon .22uf might be a good choice. ptfe is unlikely to melt.
The Alexander's are very nice, but you will only notice the difference if the circuit is truly decent.
Ian
And in my experience, the cheap Mundorf MCap (the white ones) sound pretty boring and make me want to turn the amp off, while other caps in the same place sound excellent.
Goodness, I totally forgot about those white ones... those are only good for by-pass in power supply... I much prefer certain cheap polyester to those.
my point is that it really depends on where you are putting them and how well the circuit is designed.
I bought some Solen FEP teflon caps. Installed in my DAC and sound is very dissapointing. These caps killed all the life in music. There is no air, no depth, no breath. And no burning time helped.
Tried many other caps, Jensen copper, Audio Note copper foil mylar in oil, Mundorf supreme silver in oil, Mundorf Supreme silver/gold dry type, old Jensen alu in oil, new Mundorf EVO alu/oil and EVO silver-gold/oil, Audyn True Copper, Audyn Tri-Reference, and Audyn True copper are the best (Duelund not tested yet).
True Copper from Audyn are better than copper Audio Note. Very balanced capacitor, no emphasis on any range, but everything is at very good level. The price is friendly too!
I had the same experience using the Solen FEP caps in a Dac. Went back to Rel RTX styrenes.
I used Mundorf Silver-oil capacitors in a recent Audio Research LS-15 reference restoration. The capacitors were mounted 0.5 inches away from the tubes. I ran the unit (powered ON) for 3 days and measured the capacitances again. They had not varied at all (5.595uF in both readings). So, in my testing, I did not observe any heat issues. I suspect the previous report was based on the fact that the capacitors were actually touching the tubes, which is not recommended for any setup using any type of capacitor.
I may be resurrecting this thread, but want to update this with possibly new information, so that people researching this will not be put off with old information. From Mundorf's web site, the MCap SUPREME SilverGold Oil caps are rated to 85C, so are OK for even overly warm tube amps.
Technical specifications:
Capacitance: 0.010 μF-10μF
Dielec: Polypropylene
Metallisation: 99% Silver / 1% Gold
Purity of silver: min. 99.97% typ. 99.99%
Purity of gold: min. 99.97% typ. 99.99%
Dielectric strength: 1.200 VDC
Loss angle: tan ∂ = 0.0002@1 kHz.
0.0001@10 kHz
Permissible ambient temperature 85°C/185°F
Technical specifications:
Capacitance: 0.010 μF-10μF
Dielec: Polypropylene
Metallisation: 99% Silver / 1% Gold
Purity of silver: min. 99.97% typ. 99.99%
Purity of gold: min. 99.97% typ. 99.99%
Dielectric strength: 1.200 VDC
Loss angle: tan ∂ = 0.0002@1 kHz.
0.0001@10 kHz
Permissible ambient temperature 85°C/185°F
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Actually I should have said Polypropylene in that earlier post.
Polyester caps I like include ERO MKT 1813. There are others though. Just don't be put off by the way some of them look. Looks can be deceiving.
As I noted, Polypropylene caps are really the ones to look for. I currently am using Ero MKP 1848 and Vishay MKP 1845 DC Link....
Vishay MKP 1848 DC link caps are pretty impressive in power supplies too.
Ian
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I just looked up the price of these and spilt my coffee in my lap. If I was getting into that range, I would start to consider transformer coupling...
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