The PS filtering capacitors are 4x 6,800uF @100V and 85degC. They are type LP by JunFu and measure 30x65 mm. One of the capacitors has a slight bump at the top (slightly swollen), but all measure ‘within’ specs: 5,860uF (or -14% but the specs are +/-20%) and a Dissipation Factor or 0.23 (0.20 in the spec).
The M33 SMPS looks similar but can't see whether the caps are the same. There's a lot of capacitors either coming out of a few factories and being labelled with multiple brands, or there's more capacitor factories coming on line all the time. A huge number of electros are clearly coming from Chinese factories, particularly the flood of fakes.
F&T and Nichicon are good affordable caps. S Prague Atom are good too but they are expensive and big. First of all I'd avoid Illinois filter caps. Second don't buy new old stock ones. The newer the filter caps the better. They're not like tubes/valves. Filter caps age just sitting on a shelf. From my very limited research F&T seem to be the best.
OMGCat! There are quite a few good caps still available. You want something with high hour and high ripple current rating. The heat rating doesn't matter so much for filter caps as they are typically in cooler areas of the amplifier.
The old maroon Roederstein ("ERO") electrolytic capacitors as used in Bang & Olufsen and other European makes from the 1970s can also be a pain.
w.r.t. Capacitors near heat sinks, that is usually a matter of packaging when using an off the shelf supply. You do want to keep traces short for performance and EMI, but you would prefer the capacitors not jammed against the heat sink. Of course, it also comes down to how the product is specified.
Do Film Capacitors Really Make a Difference? : r/diyaudio
IF you have good overall audio gear, then capacitors and coils can make a difference both measurable and audible. ... First of all in the crossovers/filters, film capacitors are usually the way to go. Not that much because they would sound better but you don''t want the cutoff frequency to change. After a few years, an electrolytic capacitor could easily shift the crossover frequency …
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Filter capacitor considerations
New configurations of stacked capacitors, such as capacitors with electrodes perpendicular to the PCB traces drive, can reduce the already low ESR and ESL figures of stacked capacitors. Plastic film, another non-polar material, can also be used as a dielectric in output filter capacitors. The term "film capacitor" defines these components ...
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Do you know if these manufactures make good capacitors?
There are tiny Capacitors that cost over ~$200.oo each for very demanding applications, and, Capacitors that cost ~$20.oo per 1000-pieces. The reputable suppliers are not going to stock any junk that doesn''t meet advertised specifications, but the purchaser is normally aware of the limitations of super-cheap parts.
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Real filter capacitor reliability data, anybody? : r/diytubes
IC has a bad reputation, although I think that was from a decade+ back when they released a bunch of bad caps. If memory serves, they had screwed up the formula on the electrolytes and a lot of caps blew. My guess is they''re probably fine now.
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Question about Choosing Filter Caps and Sound
Main filter caps only affect the sound when they are dead. Low impedance caps are best in that position, but since everything that size is designed for power filtering anyway, just about any cap of the correct rating will work fine.
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Replacing Filtersupply large can capacitors | diyAudio
I have sa2''s and the big mallory capacitors look like quality, compared to the smaller ones with same ratings from nowadays... I am used to replace small capacitors, where …
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Recommend high quality capacitor for main filter
In general the best rated capacitors aren''t actually that great, so you''d normally go for the best ripple rating you can find. The ripple comprises mains charging pulses, and amplifier load pulses. The former dominate (rms is high) so the difference between class A …
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Most and Least Reliable Electrolytic Capacitors | Page 2 | Audio ...
The PS filtering capacitors are 4x 6,800uF @100V and 85degC. They are type LP by JunFu and measure 30x65 mm. One of the capacitors has a slight bump at the top …
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What is Filter Capacitor? Basics and Selection
A filter capacitor is a capacitor that removes a specific frequency or frequency range from a circuit, which used to improve the high-efficiency DC output. Since the filter circuit requires the ...
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Film vs ceramic vs electrolytic caps for smoothing
Electrolytic caps have higher capacitance (for given size/price - at least above 10uF or so), but also higher ESR and ESL, so they don''t filter high frequency noise as well as …
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Quality Electrolytic Capacitors -
How many capacitors are built by one company and then private labeled for many other brands? Let me know how you go about determining higher quality and durable capacitor replacements that you prefer to use in new builds, kits, and repairs.
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Most and Least Reliable Electrolytic Capacitors
In my opinion, the fake capacitors are one of the biggest contributors to the overall failures on cheap gear (not so much HiFi, but consumer electronics in general). When it comes to audiophile approved capacitors, I can safely say all (except genuine old pulls from gear) Rubycon Black Gates being sold now are fake. There is one little thing ...
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Real filter capacitor reliability data, anybody? : r/diytubes
IC has a bad reputation, although I think that was from a decade+ back when they released a bunch of bad caps. If memory serves, they had screwed up the formula on the electrolytes and …
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A Question About ST-70 Can Capacitor Upgrades
I have used both the CE Distribution quad cap capacitor and the F&T quad cap capacitors. They are both well made and seem to work well in the ST-70 or Mark III. The CE is made in Arizona, USA on older Mallory equipment as you mentioned and is rated at 525 volts on all four sections. The F&T is made in Germany and rated at 550 volts for the first three …
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How do I test Filter Capacitors?
A capacitor with anything from 32 to 50 microfarads is a good choice for guitar amps. Heck, you can go as low as 20 for the preamp section. As for brands; JJ, Rifa, LCR, Siemens, Philips, Jamicon, Sanyo etc etc. There are quite a lot to choose from. It''s all down to what''s available to you. Good luck.
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Most and Least Reliable Electrolytic Capacitors
In my opinion, the fake capacitors are one of the biggest contributors to the overall failures on cheap gear (not so much HiFi, but consumer electronics in general). When it …
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How Long Do Electrolytic Capacitors Last [Explained]
Having a short lifespan and being unstable, the electrolytic capacitor has a bad reputation. Even though operating conditions are often far more favorable than those quoted, the reputation is justified if rated lifespan …
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JJ and F&T Caps: Experience please!
I have used both "JJ" and "F&T" capacitors in several tube amplifiers and tuners over the past 3 years without any problems. The selection is fairly good but I haven''t always been able to find the exact right mix of values inside a single can. Buying them from a reliable source is important to make sure you getting original, reliable ...
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High-pass filter. Ceramic or Electrolytic capacitor?
Reputation 274 Reaction score 129 Trophy points 1,323 Location Coral Springs, Florida Visit site Activity points 3,676 What you need is a LOW PASS filter, with the pass band 0-50Hz. A good op-amp filter is what you want to use. You are seeing examples with electros because MLC capacitors in higher values haven''t been around all that long. The ceramic cap …
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Does capacitor upgrade on amp really improve bass? : …
It may have an effect at the extremes of operation (volume @ 11) but likely not audible. Further, too much capacitance can burn out the diode bridge and possibly even the power transformer if those cannot handle the capacitor inrush current when the amp is turned on. *However... I won''t discount that there could have been a bass improvement. In ...
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Recommend high quality capacitor for main filter
In general the best rated capacitors aren''t actually that great, so you''d normally go for the best ripple rating you can find. The ripple comprises mains charging pulses, and amplifier load pulses. The former dominate (rms is high) so the difference between class A and B amps is not huge here, except that class A are at maximum load all the time.
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Most and Least Reliable Electrolytic Capacitors | Page 2 | Audio ...
The PS filtering capacitors are 4x 6,800uF @100V and 85degC. They are type LP by JunFu and measure 30x65 mm. One of the capacitors has a slight bump at the top (slightly swollen), but all measure ''within'' specs: 5,860uF (or -14% but the specs are +/-20%) and a Dissipation Factor or 0.23 (0.20 in the spec).
Learn More
Do you know if these manufactures make good capacitors?
There are tiny Capacitors that cost over ~$200.oo each for very demanding applications, and, Capacitors that cost ~$20.oo per 1000-pieces. The reputable suppliers are …
Learn More
JJ and F&T Caps: Experience please!
I have used both "JJ" and "F&T" capacitors in several tube amplifiers and tuners over the past 3 years without any problems. The selection is fairly good but I haven''t always …
Learn More
Recommended main filter caps available in the year 2020
As of 2020, what capacitor brands and product lines are considered high quality, rugged and reliable for main filter capacitors in a vintage solid state application (push pull amp). For example, are 105C caps generally more rugged that 85C caps?
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Filter Capacitor Replacement Axial vs Multi section (Sprague/JJ)
Baldwin had a reputation of quality to uphold, bad hum would not have been tolerated, I''m sure it will go away and give the quality performance they built their reputation on. While cap cans may have some drawbacks, they will …
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Filter Capacitor Replacement Axial vs Multi section (Sprague/JJ)
Baldwin had a reputation of quality to uphold, bad hum would not have been tolerated, I''m sure it will go away and give the quality performance they built their reputation …
Learn More
