Doc,
Thanks i found the same.
1800uF max for for FC or FM series for that dia and height.
That's why i ask Rob for his brand/make.
I bought Panasonic HD series 3300uF/35V, Dia 16x25, before discussing. caught with/fell for higher capacitance.
higher capacitance, will give punchy bass? am i right?
Thanks i found the same.
1800uF max for for FC or FM series for that dia and height.
That's why i ask Rob for his brand/make.
I bought Panasonic HD series 3300uF/35V, Dia 16x25, before discussing. caught with/fell for higher capacitance.
higher capacitance, will give punchy bass? am i right?
If I am not mistaken these are the supply caps. the EVM board has higher capacitance and higher voltage rating. 35V caps are all right if you are running 24 volts. but with probably too low for a 35 V POS
from the bom of the evm
2200uF CAP, AL, 2200 µF, 50 V, +/- 20%, 0.023 ohm, TH Dia 18mm EEU-FC1H222 Panasonic
from the bom of the evm
2200uF CAP, AL, 2200 µF, 50 V, +/- 20%, 0.023 ohm, TH Dia 18mm EEU-FC1H222 Panasonic
Looks like a reasonably good choice, but at ~35.5mm's long it won't fit inside an Aiyima A04.
Rob43
Browsing quickly on Mouser with the Aiyima's casing in mind, I found...
What about that one?
2700uF/35V, D18xH25, 1,98E 5000h and 3,8A ripple
EKZN350ELL272MM25S United Chemi-Con | Mouser France
If D18mm is too much and 16mm is to be prefered, there is also:
2200uF/35V, D16xH25, 1,33E 6000h and 4A ripple
UHV1V222MHD Nichicon | Mouser France
It is not the Panasonic brand but the specs looks right to me, although no first hand experience with these personaly
Good luck
Claude
What about that one?
2700uF/35V, D18xH25, 1,98E 5000h and 3,8A ripple
EKZN350ELL272MM25S United Chemi-Con | Mouser France
If D18mm is too much and 16mm is to be prefered, there is also:
2200uF/35V, D16xH25, 1,33E 6000h and 4A ripple
UHV1V222MHD Nichicon | Mouser France
It is not the Panasonic brand but the specs looks right to me, although no first hand experience with these personaly
Good luck
Claude
Will 27 mm fit or 25 is the absolute height. I found a Rubicon 18*25 (27 with leads) I like. Will post part if someone confirms it will fit.
Note that ripple stated at 100 kHz is not applicable to supply caps. In order to calculate the ripple at low frequency (60Hz or below) , as a gestimate, multiply the 100 kHz ripple current by a correction factor .75 (average) to .66 (with safety margin) and you can get an idea of the ripple. Correction values are based on a Panasonic specs sheet and used as reference.
Note that ripple stated at 100 kHz is not applicable to supply caps. In order to calculate the ripple at low frequency (60Hz or below) , as a gestimate, multiply the 100 kHz ripple current by a correction factor .75 (average) to .66 (with safety margin) and you can get an idea of the ripple. Correction values are based on a Panasonic specs sheet and used as reference.
Attachments
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This matches voltage and capacitance to the TPA3251EVM supply caps. Will do a full 36 Volts supply and it has a very nice ripple current.
Rubycon 50ZLJ2200M18X25
Capacitance 2200µF
Tolerance ±20%
Voltage - Rated 50V
Ripple Current @ Low Frequency 2.59A @ 120Hz
Ripple Current @ High Frequency 3.7A @ 100kHz
Impedance 22 mOhms
Lead Spacing 0.295" (7.50mm)
Size / Dimension 0.709" Dia (18.00mm)
Height - Seated (Max) 1.063" (27.00mm)
In the USA available in Digikey. (non stock as Mouser).
Rubycon 50ZLJ2200M18X25
Capacitance 2200µF
Tolerance ±20%
Voltage - Rated 50V
Ripple Current @ Low Frequency 2.59A @ 120Hz
Ripple Current @ High Frequency 3.7A @ 100kHz
Impedance 22 mOhms
Lead Spacing 0.295" (7.50mm)
Size / Dimension 0.709" Dia (18.00mm)
Height - Seated (Max) 1.063" (27.00mm)
In the USA available in Digikey. (non stock as Mouser).
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Dr Mordor, thanks, the 2700uF are the ones I intended to fit into my friend's unit inboard and offboard 🙂
Frabor, yes of course, but the correction factors (frequency, heat etc.) should be pretty similar for caps with similar construction so that their relative ripple ranking remains the same 🙂
Enjoy music
Claude
Frabor, yes of course, but the correction factors (frequency, heat etc.) should be pretty similar for caps with similar construction so that their relative ripple ranking remains the same 🙂
Enjoy music
Claude
ClaudeG, can you elaborate "fit into my friend's unit inboard and offboard 🙂"
What supply Voltage are you planning to use since you are using 35V caps?
What supply Voltage are you planning to use since you are using 35V caps?
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Will elaborate once it is done 🙂
In short the existing caps will be replaced by the aforementioned 2700uF caps, 35V as per link. I won't be running higher than 28V anyway (we don't intend to change the huge Meanwell SMPS feeding the 2 amps)... and perhaps even a bit less in real life given I will try also an offboard PI filter between the SMPS and the amp (or just additional caps as close as possible, depending on what sounds best).
That is all just a small external tweak (apart from the existing PS cap replacement), as last extra toy to play with - many other things to do first inside the unit.
Once done I will report, as said it will take some time...
Claude
In short the existing caps will be replaced by the aforementioned 2700uF caps, 35V as per link. I won't be running higher than 28V anyway (we don't intend to change the huge Meanwell SMPS feeding the 2 amps)... and perhaps even a bit less in real life given I will try also an offboard PI filter between the SMPS and the amp (or just additional caps as close as possible, depending on what sounds best).
That is all just a small external tweak (apart from the existing PS cap replacement), as last extra toy to play with - many other things to do first inside the unit.
Once done I will report, as said it will take some time...
Claude
Seems like these Nichicon UBY caps might be a good choice for Vcc caps on the Aiyima A04 amp:
https://www.mouser.com/datasheet/2/293/UBY_e-1280407.pdf
I am still debating on either a Panasonic EVJ volume pot vs. an Alps RK09712200MT volume pot. I think the Alps will fit on the little daughter board that is in the amp, whereas, I’ll probably have to wire the Panasonic pot to the six pins on both sides of the daughter board.
I’m also thinking about trying a pair of the NJR MUSES8820 op amps (mass production version of MUSES02) in place of the OPA627AU op amps I have in place now.
For now, I am very pleased with this little, but powerful, amp driving my KEF LS50 speakers. Listening to Bebel Gilberto’s “Tanto Tempo” playing through my Sony ES Blu Ray/SACD/CD player, and the music has me feeling like I’m in Rio de Janeiro.
https://www.mouser.com/datasheet/2/293/UBY_e-1280407.pdf
I am still debating on either a Panasonic EVJ volume pot vs. an Alps RK09712200MT volume pot. I think the Alps will fit on the little daughter board that is in the amp, whereas, I’ll probably have to wire the Panasonic pot to the six pins on both sides of the daughter board.
I’m also thinking about trying a pair of the NJR MUSES8820 op amps (mass production version of MUSES02) in place of the OPA627AU op amps I have in place now.
For now, I am very pleased with this little, but powerful, amp driving my KEF LS50 speakers. Listening to Bebel Gilberto’s “Tanto Tempo” playing through my Sony ES Blu Ray/SACD/CD player, and the music has me feeling like I’m in Rio de Janeiro.
Hi Rich,
These caps look indeed very good to me... in fact I can't fault them, specs are even better than the ones I planned until now, just life seems short with 3000h but perhaps they measure differently as they mention also much higher temps...
I found these at Mouser's - perhaps the ones you had in mind?
EKZN350ELL272MM25S United Chemi-Con | Mouser France
Regarding the volume pot, indeed hesitation is between these 2 pots if one wants to use a similar footprint... I am fortunate not to have to but follow your experiments with interest as for a starter we might have to do our initial testing with a temporary pot to evaluate other tweeks, unless we get the right pot in time...
I am glad you still enjoy that unit - we are likely also to play with external PS filtering, so perhaps also usefull to you one day, who knows...
Have fun, Rich and thanks again for exchanging
Claude
These caps look indeed very good to me... in fact I can't fault them, specs are even better than the ones I planned until now, just life seems short with 3000h but perhaps they measure differently as they mention also much higher temps...
I found these at Mouser's - perhaps the ones you had in mind?
EKZN350ELL272MM25S United Chemi-Con | Mouser France
Regarding the volume pot, indeed hesitation is between these 2 pots if one wants to use a similar footprint... I am fortunate not to have to but follow your experiments with interest as for a starter we might have to do our initial testing with a temporary pot to evaluate other tweeks, unless we get the right pot in time...
I am glad you still enjoy that unit - we are likely also to play with external PS filtering, so perhaps also usefull to you one day, who knows...
Have fun, Rich and thanks again for exchanging
Claude
Re caps Rich, just for sharing, I was on these until now
EKZN350ELL272MM25S United Chemi-Con | Mouser France
Both "yours" and these seem good TBH and possibly quite close anyway for our purpose?
Claude
EKZN350ELL272MM25S United Chemi-Con | Mouser France
Both "yours" and these seem good TBH and possibly quite close anyway for our purpose?
Claude
Just received a Drop offer for discounted pricing on some Burson Audio V5i op amps, singles and doubles.
Burson Audio V5i Opamps | Price & Reviews | Drop (formerly Massdrop)
A matched pair of the V5i-D dual op amps is $42 (regularly $69).
Burson Audio V5i Opamps | Price & Reviews | Drop (formerly Massdrop)
A matched pair of the V5i-D dual op amps is $42 (regularly $69).
Hi Rich,
You will tell me if you prefer the OPA1656 or the V5i.
I personally sold my V5i...
Thanks
You will tell me if you prefer the OPA1656 or the V5i.
I personally sold my V5i...
Thanks
Daniboun,
Will do. I liked the OPA1656, but there was something about the presentation like an out-of-phase character that really kept me from enjoying the music. I am still using the OPA627AU op amps, but decided the discount on the Burson Audio V5i-D was good enough for me to splurge. If I don’t like them in the Aiyima A04 amp, I’m sure I can find another home for them in one of my SACD/CD players. I have four audio friends around the US who have tried the Aiyima A04, and they are amazed at the sound quality of the $50 amp.
On another subject, just purchased boards and transistors to build an Aleph J. I have to take advantage of the pandemic to work on audio projects.
Stay safe!
Will do. I liked the OPA1656, but there was something about the presentation like an out-of-phase character that really kept me from enjoying the music. I am still using the OPA627AU op amps, but decided the discount on the Burson Audio V5i-D was good enough for me to splurge. If I don’t like them in the Aiyima A04 amp, I’m sure I can find another home for them in one of my SACD/CD players. I have four audio friends around the US who have tried the Aiyima A04, and they are amazed at the sound quality of the $50 amp.
On another subject, just purchased boards and transistors to build an Aleph J. I have to take advantage of the pandemic to work on audio projects.
Stay safe!
Thanks Rhing, for the feedback )
Those 5Vi are great but they did not work in my double DAC AK4497 for a reason I still ignore..... I wish you could like it and also hope they will work with your CD player as well.
I am also working on a new amplifier but still waiting for the board to come.... I will share some pictures soon )
Take care Bro )
Those 5Vi are great but they did not work in my double DAC AK4497 for a reason I still ignore..... I wish you could like it and also hope they will work with your CD player as well.
I am also working on a new amplifier but still waiting for the board to come.... I will share some pictures soon )
Take care Bro )