germoju said:
BigBellC said:
Hey Guys,
I'm looking which rev to build... now, in the BOM for Rev D, there are some parts that I didn't find or where I have some questions about.
- Some Caps are listed with "elec or film"...what do you recommend? Advantages? Perhaps sonically?
- The Mica caps(C3, C6)...Are the micas from Mouser okay?
- What about C23 (6.8 µF, 35V) Nichicon PW series okay? Normally I use Panasonics, but they aren't in stock...
Many Thanks!
Hi,
did you have an answer for the C23 ?
I find the C19 and C20 : T350F685K035AT is
35V / 6,8 uF OK
For the C23 I got UPM216R8MED is
100V / 6,8 uF. On the Mnats'BOM 2.2 I can read
C23 : 35V / 6,8 uF.
What is correct ?
My other problem is with C18 : I got a 50V and Mnats say 35V.
As far as volts go, you can always go higher with no problem. Just don't go lower and you will be fine.
I wanted to use the Panasonic FM Series Caps as they are low ESR and specifically designed for audio use..... Oh and also highly reccomended. But for the values not in stock, Panasonic FC series were the main choice which are also low ESR and specifically designed for audio use. However as many reivews will state the FC series don't quite sound as musical as the FM series, which are much preffered by the 'pros'. My secondary choice, for the remaining values I couldn't get in the FC series were the Nichion PS series, which are once again low ESR and designed for switching power supplys. Infact comparing data sheets on the two series, the Nichions are almost identical with just as good frequency coefficient of the ripple current as the Panasonics.
Polypropylene capacitors are a mainstay for audio upgrades. Their quality is excellent, they're reliable, and there are quite a few sources for them. For low voltage work, the 50V ECQ-P series from Panasonic are excellent, but they only go up to 0.47pF. Also people seem to be fond of the Wima FKP2 series which have a much larger capacitive range, I would recommend them. Polypropylenes come in two types: film and foil, and metallized. The film and foil types are excellent, but big; the metallized units are smaller, but some listeners say they don't sound quite as good, (I believe that to be preference). A word of caution: polypropylene caps tend to be larger than polyesters of a similar value. Before you order, be sure the replacements will fit!
Polystyrene capacitors are the best you can buy easily. (Teflon caps are reputed to be even better, but unless you're NASA you probably can't get them in small quantities.) They are only available in small values (up to about 0.05F), and they're easy to damage with a soldering iron, but they sound wonderful: clean and clear, with lots of detail and no high end grittyness.
!
