I believe he's right, in the Cerafine line, the only 4700uF is only 6.3V. 50V only goes up to 470uF. Guess they were thinking these were not supposed to be used for "high voltage" power supplies!
I am thinking of trying the Nicholson Muse FX or Great Supply, which come in 4700 uF/35v for $2.95 from Michael Percy. Either that or stick with the Panasonic FC's from Digikey, and put the precious Elna's only in the reservoir.
Angela lists 4700uf 50V and 10,000uf 50V cerafines. I'm trying to buy 4 of the 4700uf ones from them. I don't trust the red notice that says "only one left in stock".
How are the Nichicon 4700uf KG Gold caps? They're cheap from Percy. Black Gates are too expensive.
This is for the kevin gilmore dynamic headphone amp/pre. I see two box caps in antness's power supply picture, can those be replaced with something better like auricap?
I saw in the headwize page about the gilmore amp and started wondering, which caps does kevin use on his? What's the optimal voltage cap? I see 4700uf 100V in the schematic in a couple places, that has me confused...
I would believe the notice on Angela that says only one left. Not many people are only going to be wanting 1 of a capacitor, nor are there many people who would need that cap. to make a repair. I would agree with you if they said two left, or four left.
However, I think that capacitor has been on their site for a few months...
I don't know, seems kinda fishy they'd sell just 1 cap. I would think they would either sell it for a really high price or auction it off or something if there really is only 1 left. Or maybe they have restocked and were just too lazy to update the page, that's my first guess.
Lately I've been using 4700uF 35V Blackgates shunted with Auricaps just because I'm overboard like that, using a great bypass cap helps even Blackgates so I think you should do it to whatever large electrolytic you choose.
I still haven't tried the Nichicon Golds against the Blackgates, too busy with other things right now. I might be able to get around to installing them next week but it'd be at least a couple of weeks after then before I have impressions (break-in and long term listening). In case other people care I did just finish comparing the Blackgate PK with the Standard series and the PK might be a tad better but its not huge (compared same voltages and values).
Looks like you're assembling the best headphone system in the Navy
carlo, I found too that Auricaps helped when bypasing series N (top of the line) BG (4.7uF 50V one). However, then I tried 22uF 6.3V NX instead (perhaps a notch below top of the line?) and noticed more transparent sound (main benefit of film bypasses) than that of N capacitor and still haven't been persuaded that I need those Auricaps any more. I'm talking signal path btw, which is much more critical.
Does anybody really know why Elna Cerafines and Silmic's are so hard to come by? I mean, they have a web site, they are still being manufactured, their web site lists distribution and retail sales channels, What is the deal?
I haven't actually picked up the phone and called any of the distributors or sales, but have sent several emails and filled out several "web forms", these people don't even answer!
I did get a quote back from THLAudio
1000uF/25v = 190 NT$ = $5.52 US
4700uF/25v = 600 NT$ = $17.74 US
You would have to add shipping and 2% handling (from Taiwan )!!
Those 1000uf/35v ones on ebay are not that bad a deal, about the same, as above, except they are 35V, better for a power supply.
The power supply runs at an initial 30V, I'd like a little more headroom than 35V, which is why I really want them 4700uf 50V cerafines. Or am I just being ignorant? But the only 4700uf Cerafine I could find over 30V is that 50V one...
carlo - antness suggested to me that if I can't get the 4700uf, going with the 10,000uf cerafines (these things are huge, 4" tall, $49 each, still cheaper than BGs) with a 470uf cerafine bypass cap could be even better. I assume Auricap would be a better choice. Wouldn't it be a good idea to bypass even if I can get the 4700uf caps?
Since my last post, I DID actually call every sales/distributor listed at elna-america in Texas and New Mexico, the ones that haven't disappeared (one), showed no ROA's or ROS's of any value in their "extensive inventory". So I called Elna direct (several times), got voicemail on their main line!! I did speak to a real person once, but she transferred me somewhere, and it was voicemail! Nothing against voicemail, I used to work in that field for almost 20 yrs., but it seems these people do not return calls.
So I am going to keep hounding them, and try to play dumb or pitiful, according to PinkFloyd, he got a free bag from them!!
If I end up getting a line on quantities of Elna's, I will post. I am looking for 1000uF 25v min., 35 would be better, and some 4700uF 25v min, but I have just about decided that I will leave my 4700uF Panasonic FC's as the initial filter caps, and try to get some 1000's for the reservoir, I have some Wima 1uF's for bypass.
Hell, I may just save up for some BG's, I have been having quite a time reading the BG threads over at diyaudio!!