Capacitor


Dear friends I am interested to upgrade my caps in the tube preamp from Audio theta tin foil 3uf200VDC to Miflex1uf 240VDC copper foil what are your thoughts will reducing the value to 1uf affect the bass and frequency response or should I go with a higher value than 3uf  
jasbirnandra
@salectric , how many new topics available for any audio forum? Subjective vs. objective argument never ending and futile, as is the best whatever.
Tried the Russian PIO in a Latino clone Dyanco amp some years ago, warm, inoffensive, not top tier resolution, transparency.
Dear @jbhiller  : ""  Wima  are fine caps that do a decent job and meet spec. But they do not come close to things like VCap.  ""

A just two years ago my point of view was way worst against Wima that your nice words about.

Maybe the differences in what we think in the caps specific subject could be that I think you have several years more than me to be exposed to tube electronics and I left tubes ( I was with for around 10 years. ) years ago for full SS electronics when I " discovered " SS technology to sound reproduction.

My first hand experiences and even today experiences listening to other systems with tube electronics still tell me that tubes are more colored items than today SS units. I can say more colored and noisy.  

Could be that those colored and noisy tubes performance don't let to we can listen all the real Wima quality level performance and that those tube characteristics could hide the real quality performance of the boutique caps.

When we are accustomed to some kind of colorations ( coming from tube or SS devices. ) what we want it is more of the same with " higher quality "..

Due that Wima/Kemet/Vishay are low coloration caps just does not hide the weaks in electronic/speaker designs. Wima naked those colored units, so we don't like it what we are listening with the Wimas and prefer the boutique ones.

Btw, between others I used the Teflon V-caps you are using and can't does what the Wima /Kemet/Vishay does.

R.




Raul, I get your points. Well made.  Do you work for Wima?  
Just kidding. 
I do believe I hear better signal through two of the Vcap lines and others. I agree to disagree. 
Oldhvymec

You CAN use polar capacitors as long as you connect them back to back like positives together or negatives together.  This will HALF the value of the capacitance however. So if you intend to make a resultant of 10 uF of capacitance, you will use TWO 20 uF connected back to back. 
So this is one way of kludging it.  Another point to think is the LONGEVİTY of the capacitors. Polar ones will most likely be electrolytics and will NEVER last as long as film capacitors hence adding another reason to not use polars. 
@jasbirnandra 

If you have not decided on which 3.3uF caps, here is some feedback on the ODAM in the Canary.

Ok, I have 4 x 0.01uF CuTF and 4 x 3.3uF Odams. The Odams have 12 hours time on them.

My subjective findings so far. As granny said, these caps take a very long time to break in, and to make matters worse their character swings a little during the process. Even after 12 hours solid I feel they need a lot more time. The sound would go from recessed to so far forward that it felt like it went behind me, and then back to recessed again. Too little 3D to too much 3D, back and forth. 

At first I felt a little underwhelmed by the ODAMs, but the issue is they do everything very well, so nothing stands out to "catch" your attention. It is like a steady stream of good everywhere.

Bass is very extended and sounds very firm - very good for SET amps. The top end is also nicely extend and has a very gentle but crystal clear quality. I had sibilance on a particular George Michael song - its gone; the "S", the "P" and "T" sound is still clear and pronounced. I had problems with high piano note on a Diana Krall track - the problem is gone. I hear the note perfectly - it's still loud but it's no longer offensive.

The most enjoyable for me is the mid range. Voices and strings have a remarkable lifelike quality and I can say in all honest I have never ever heard sound presented on such a neutral way. The way the strings vibrate and change in tone as they decay is as real as it gets. Fantastic.

How much is contributed by the CuTF and how much by the ODAM I cant say. I have two in each channel. 

I'll report back in another 12 - 24 hours and hopefully I get a better handle on the soundstage, which I know is what you are looking for.

Regards

PS. to those condescending folks who feel they need to tell me I am not hearing what I have heard, that I have wasted my money, or that I have behavioral health problems, please spare me. It may come as a terrible shock to you, but your "expert knowledge" is of no interest to me.