Hi Michaelvv,
It`s good to know you have a high quality 2A3 DHT amp for such a reasonable cost.DHT based tubes(SET or PP) are my favorite type of amplifiers,they so naturally convey music`s emotion when properly implemented. I mentioned the 2A3 amp by Dennis Fracker(Serious Stero) which has a great reputation but is very expensive! Congratulations, you have two fine power amps to enjoy.
Charles, |
Better than copper cast Dueland? Jupiter Condenser is going to be releasing a new copper foil capacitor in about 2-3 months. Two people have compared prototypes directly to cast copper Duelands (a .1 and .47) and are hearing things they never heard before (all good things). These caps will be much less expensive than the Duelands but more than the current Jupiter caps. The pricing has not been set. The new Jupiters have some new techniques that have never been used in a Jupiter cap. Silver leads will be standard. They will be available in the same values that the current caps are available in...ie...there will be 100V versions for speakers and 600V versions for tube electronics. Please don't call Jupiter to find out more info.....please let them have the time to make these things. There is nothing more Chris can tell you than what I just wrote......We will just have to wait. I will be getting some in as soon as they come off the press and will report here. I am most interested in the 100V versions for my open baffle speaker kits I am developing.
So, imagine a cap at less than half the price of a cast copper Dueland that sounds better.....a nice image indeed. Stay tuned. |
That's great news Ricevs! I will keep an eye out for the new Jupiters.
In the meantime, I am trying some JB JFX Premiums that were recommended earlier in this thread. They are quite good sounding by any standard, and when you factor in the price (about 5% of a Duelund CAST) they are a real find. |
If Jupiter can develop a foil capacitor that sounds better than the Duelund CAST for less money that'd be quite an accomplishment. Hype and hope is one thing, actually achieving this is another. Once these capacitors are available time will tell. High End audio is ripe with stories about the next great product. Sometimes they come through, sometimes they don't.
Regards, |
I am glad folks are trying the JFX caps. Folks, listen up....these are very, very good and only $3 or so a pop for the smaller coupling or output size caps.
Try it folks. You will be pleased. |
It should take until the end of September for my DIY colleague to build the 1st phase of the external crossovers (changing resistors first). As the phases get done I will be posting the results. Cheers. |
Hi Charles1dad.
Will first receive my 2a3 DHC Amp in 2-3 month of time.
To be honest , I'm still in a state of emotional chock
after heard was it capable of.
/Michael |
Hi...
Has anyone tried these clarity TC , http://www.claritycap.co.uk/products/tc.php as their power supply caps ????
I'm think I'm going to try them in the 2a3 amp I have ordered, which will show up in a couple of months.
/Michael |
Hi Ricevs, There is an updated Capacitors Test in Humble Homemade Hifi with regard to the new Jupiter Flat Stacked Beeswax Cryo Capacitor. The new Jupiters have some deep vaacum, cryo (?, 1 mm diam. silver lead outs, high pressure and mechanically well damped techniques that have never been used in a Jupiter cap.
The excellent Jupiter's final score is higher comparing f.e. to the Amp Ohm FE-XAL-AL's or Clarity Cap MR's or Mundorf MCap Supreme Silver/Gold's scores, but somehow ... far enough to the cast copper Duelund"s point rating. |
The cap on Humble Homemade HiFi site is NOT the new cap from Jupiter. The Flat stacked Beeswax cap has been out for over a year but just now got reviewed. This brand new not yet released Copper foil cap is suppose to be way, way better than the current best Jupiter caps. Wait and see....er hear. |
For those who have experience burning Duelund CAST capacitors with the cable cooker.
a) I first put the 7.5uF in series with 2.4uF to burn with the cable cooker. How many days do you suggest?
b) Then I will put the huge 56uF. How many days?
Thanks |
Question for those with experience in biamping:
I bought a second pair or Krell fbp 750mcx, a Pass XVR-1 and interconnects/cables to biamp the Dunlavy SC-VI. I will use the extra set of Krell exclusively for the 4 x 15” woofers.
The passive crossover circuit for the parallel 15” drivers has a series inductor of 6.8mH (first order crossover), and then a RC circuit (Zobel – for impedance equalization) with R= 0R37 (6x 2R2 in parallel) and C of 220uF.
When I biamp with the new set of 750mcx, should I: (i) remove only the inductor and leave the parallel RC, or (ii) remove also the parallel RC?
Of course I can try both alternatives, listen and measure, but I would like your opinions. |
The Krell should be able to handle any reactive whip lash with out a Zobel network. The 220uf cap seems that it would be the bass filter for the 2 8ohm 8 inch mid-woofers wired in parallel that net 4 ohms combined for a 6db slope around 180hz. That's a maybe from way over here. Tom |
Hi Tom,
The 220uF cap is not in the circuit of the 8" woofers. The crossover circuit for the 8" woofers is composed of a 2.56mH inductor in series with a 10R0 resistor (3x 30R0 resistors in parallell), and in parallel with the 8" woofers are a 3.3uF cap in series with a 123.0 uH inductor.
I understand the Krell is able to drive the parallel 15" woofers directly, but I was wondering what are the pros and cons of leaving the Zobel network or taking it out. |
You might email Tom James at Eminence speaker he had much to do with that 15 inch driver when John was designing the VI's. Tom |
I exchanged emails with Anthony Lucas, Eminence tech support, back in 5/2006. I need to take out one of the 15" woofers and send him the part number, which I still haven't done, but plan do do soon. |
Just been away looking at Solar and Tesla cars. Other interests than Audio. More tests coming once the weather cools! |
If trying to merge your audio and automotive interests, you might check out the Williams race team/Williams Advanced Engineering/Williams Hybrid Power. They use ICW/ClarityCaps in energy-recovery braking systems. |
This thread is a complete mess! |
Thanks Dave,
I follow F1 closely especially the Lotus Team. We each had one of those back in the day. I went on line and checked out the link to the Williams Team and their hybrid technology and the division of Clarity Cap that provides some of their components. Many new products useful in audio as well?
I look to F 1 racing for ideas on room tuning and acoustic control devices for my own listening space and speakers. These teams utilize the the energy flow across their driving machines instead of killing off what's natural, unlike most devices designed and used in audio rooms. Tom |
Jburidan, your post just cracked me up. So true........ |
|
I have a question and I hope one with good experience can help.
I want to upgrade the caps in my 45 SET amp. I need the following;
2 - 100uf /100 v
2 - 100uf /350v in power supply
Right now just cheap electrolytics. I want film caps, but very few go this large and don't know which ones are best.
I was thinking of Clarity SA or the TC line from Clarity. Solen?
Ok, please help me. Yes, the cap can be rated for a higher volt value then the original cap. |
I have looked at the TC line for my purpose but would have to use an external box of caps. The link that Dave posted about the Williams Hybrid Electronic Flywheel previous shows many cap alternatives with low ESR. Dave may want to come on line with his suggestions. Tom |
|
Grannyring, I too have the intentions to change caps (in my power supply, tube). You have a lot of capacitors: Mundorf Tubecap, Mundorf M-lytic Hv+, Obbligato PSU-capacitors (only 2), Claritycap TC-range and the common polyprop cap Audyn Q4 and Q6-range, Solen, Dayton (250V) and JFX-series(250V) to name a few.I have tried the Obbligato. Want to hear comments. |
Grannyring & Batalok,
There is a new ClarityCap TC/450V metalized polypropylene power cap that uses thinner film technology than the existing TC700V range. It offers good volumetric efficiency relative to the alternatives listed above. It has a low-resonance acrylic tube like MR, and radial four-pole Kelvin terminations to improve high frequency filtering. Dims for 100uf are 50x65mm.
ClarityCap OEM Sales |
Where o you purchase these new TC caps? Thanks for the post! |
Yes, where can I buy them? Clarity Cap's website shows no information. |
See no TC's listed but this company is related to Clarity Cap and may offer some concepts. They do offer film caps. ttp://www.icwltd.co.uk/products/pc.php |
Hi-Fi Collective is just now receiving inventory and Parts ConneXion should have inventory in 5-6 weeks. |
Parts Connexion has them listed. |
Only the 700V version, not the new TC 450v version. |
You guys had me feeling bad making the Tesla comment so I went out today and bought some Psvane 12AX7's from partsconnexion. Should be here tomorrow or next day. Chris had good things to say about them.
This thread was about the value in audio and I have to admit those Duelund CAST caps are good value. (with the new discount on small values)
I am going to compare the Psvane's vs. the OS (many kinds) and the Gold Lion 12AX7's which I thought were better and any old tube I have.
I never should have test drove that Tesla. 400hp instant power of electric is addicting! Sorry my mind is wandering again. |
Just so everyone knows I was just not going gaga over a car. Elon Musk (Tesla) says Super Capacitors are what is going to replace batteries.
He did not mention how good they would sound though? |
I bet they will have extremely low ESR. Tom |
Psvane tubes are in and I am not sure what to make of them? Sound very different. They are for sure low resonance you can tell that right away but dynamic and bass shy for now. |
At 10+ hours these tubes sound terrible!
Very dead sounding. Very HiFi sounding. Very poor dynamics. I feel like someone has been pulling my leg. So far these are the worst sounding tube I have heard in my system. I had only vintage tubes until the Genelax Gold Lions which are VERY good. I sure hope this improves! If this is what most new tubes sound like I can see the mega $ on NOS tubes. |
The Psvane 12ax7-T tubes are excellent tubes...very dynamic, clear and neutral. Give them some more time. |
Sherod
I hope you are right. I have heard so much good about them. I have only old (non power) tubes and when I tried the Gold Lions I was not expecting much and was shocked just shocked at how dynamic and quiet they were. |
Claritycaps TC series 450V is now on the list of Hifi Collective. To see you have to push the button "buy now!" at the capacitors homepage. |
|
Sherod
Any idea on how long the Psvane's have that greyish tone?
Right now they are like a blanket over the music?
I went and got some of my old Mullard 12AX7's to listen again. They sound very similiar to the Gold Lions but the Gold Lions (Genalex) sound every bit as good and better IMO.
I was looking and prices for vintage tubes have really went up.. Maybe now I can see why?
The Psvane's on the other hand? Other than the Genalex's I have not used new 12AX7's and maybe got a false sense new tubes were pretty good...
Not to be too critical of the Psvane's they seem well built as are the Genelax's. |
I have read that some of the new Psvane 12ax-7 tubes could become microphonic after a while, but I haven't had any issues yet. My Psvane 12ax7 tubes are in my 1960 Pilot 402 receiver. They sounded pretty good right from the start but I noticed that after maybe 40 hours, they really opened up to flesh out the top and bottom end. Previous 12ax7 tubes I used were old NOS Siemens and Mullard. In my Pilot, the Psvane are superior in clarity, dynamics and frequency extension. I have never heard cymbals sound so natural. Keep in mind that this is my bedroom system. Speakers are refurbished Dynaco A-25, with Musicap on tweeter and VH Audio UPOCC copper Airlok wiring in crossover. This Airlok hook-up wire is really special...incredible clarity and dynamics. |
Sherod
Mine sounded dead and lifeless out of the box to a shocking degree and tones were grey. Sinking feeling in the stomach not just of the money but lack of choice of a new tube.
The good news they have improved dramatically at around 30 hours to the point they sound nothing like they do new and are becoming quite good! I could tell right off the bat they were low resonance. I really thought this was going to be no contest with the Gold Lions but now I am not so sure...
I hope the Psvane's keep improving!
Are we in a second tube era where it is no longer some tube of the past? |
Volleyguy,
Assuming that your Psvane 12ax7 tubes meet spec, you'll continue to hear improvements. After 50 hours, you'll hear a more open midrange and particularly extended bass and high frequency response. I have yet to hear a better high end from any NOS 12ax7 than what these new Psvanes provide. |
Volleyguy,
I'm glad you were patient and gave the Psvane tubes some reasonable burn in time. Some people are too hasty in judgements and never realize the true performance of products. These tubes are likely to continue to improve. |
Charlesdad and Sherod
I only posted initial impressions for someone else who may hear them. I thought the Psvane's were terrible out of the box and had not heard anyone say this? I even took them out to listen to music. I do have to admit even right off Sherod I knew they were going to be very good at the high frequency. I could hear they were low resonance tube though right off.
In the burn in process I would change the tube in and out and my daughter could hear the difference on a video game! (it was that big) I kid you not, double blind and she could hear the difference. She loves her video game hooked up to several thousand $$$ worth of Duelund caps! We have really got great family use out of the Duelund parts. Just two channel for movies but the sound is awesome!
The Gold Lions did not change in sound so much through the break-in. |
Personally, I don't care for the sound of Mundorf caps. A good similar German made cap is the Audyn. For top shelf caps I like Jupiter (USA) or Duelund (Denmark). |
At the end of the 12AX7 test whichever tube I think is the best will get the sales of replacement of my vintage tubes I will be retiring them to reference new tubes.
These are good times for tube lovers! Is this the tube golden era??? I can say none of my vintage tubes has the has anywhere near the high freq clarity of the Psvanes. (Wow!)
Is this going to end up like a Duleund CAST vs. a vintage cap?
I think the internet has been excellent for connecting a small group locally but larger group world wide who care about this kind of stuff to producers and customers. I think this is why we are getting real breakthroughs. |
