CERSEPN,
Not sure of they are great, but this is what I use.
Antek - Transformers - Grid View
I think R-Core or some Hammond
Hammond Mfg. - Power Transformer - (229 Series)
Not sure of they are great, but this is what I use.
Antek - Transformers - Grid View
I think R-Core or some Hammond
Hammond Mfg. - Power Transformer - (229 Series)
Legato...
I use a pair of V1.1 Bibs to power my Legato, +/- 15 VDC output. I would doubt that there would be any advantage in going to dual mono supplies, considering the low output impedance of shunt regs in general, and one would start needing a really big chassis to accommodate so many supplies and all the heat that would be generated, but I am sure there are those folks who might think that a single supply is compromised!
My sound is so good I am happy.
I use a Hammond 266K35 EI (52.5 VA, dual secondary, 17.5 volts out) and this works quite well to produce the 15 volt output from the shunts without excess heat production.
I use a pair of V1.1 Bibs to power my Legato, +/- 15 VDC output. I would doubt that there would be any advantage in going to dual mono supplies, considering the low output impedance of shunt regs in general, and one would start needing a really big chassis to accommodate so many supplies and all the heat that would be generated, but I am sure there are those folks who might think that a single supply is compromised!
My sound is so good I am happy.
I use a Hammond 266K35 EI (52.5 VA, dual secondary, 17.5 volts out) and this works quite well to produce the 15 volt output from the shunts without excess heat production.
Thank you, Salas, qusp, AndrewT, Tea-Bag, merlin el mago, barrows!
Just to confirm a couple more things, does my BOM look correct?
MOSFETs, LEDs, misc stuff from minikits. BTW, the minikit included some resistors with weird values that's not in the BOM, like 2 x 2ohm resistors?? Are they supposed to be inside.. ?
For a 2 regs, + and -, 15V with current load 350mA:
8 x MUR820
C102,202,104,204: 4 x 4,7uF-10uF/63v MKT <- Any value in the range is fine? Bigger the better?
C102,104,202,204: 4 x WIMA MKS4 4.6uF/6.3
C101,C201: 2 x 220 uF/50-63V
C103,C203: 2 x 47 uF/50-63V
C105, C205: 2 x 10000uF/63V
Transformer: 80VA, 2x 18V ?
5W dummy resistor load -> Any resistance value fine?
" R101,201,301 3 times higher spec than their dissipation (voltage across each x CCS current). *Refer to end of text on how to calculate their Ohmic values. 3-5W spec will usually be enough."
Okay, so the legato presents load of ~ 350 mA, sparing another 100 mA of excess current (is that too much? i stay in a tropical country, ambient temperature is about 30 deg celsius most days) the graph reads about 4.8V. Forward drop of LED array = 2 x 1.9 V?
So [4.8 - (2x1.9)] / 0.3A = R101 value? But from the guide it seems like it's supposed to be the other way round instead -> LED array V drop minus graph voltage. So i'm obviously calculating the LED array V wrongly...
I'm guessing mine is the older SSLV1.1 board since i don't see any extra 4 LED positions...There are 3 LED positions though D102,103,104. Is that it?
Have a feeling i'm doing this all wrong.. can someone enlighten me please? I went through the guide and Salas recent posts about this a few times but it is all flying past my head.
Just to confirm a couple more things, does my BOM look correct?
MOSFETs, LEDs, misc stuff from minikits. BTW, the minikit included some resistors with weird values that's not in the BOM, like 2 x 2ohm resistors?? Are they supposed to be inside.. ?
For a 2 regs, + and -, 15V with current load 350mA:
8 x MUR820
C102,202,104,204: 4 x 4,7uF-10uF/63v MKT <- Any value in the range is fine? Bigger the better?
C102,104,202,204: 4 x WIMA MKS4 4.6uF/6.3
C101,C201: 2 x 220 uF/50-63V
C103,C203: 2 x 47 uF/50-63V
C105, C205: 2 x 10000uF/63V
Transformer: 80VA, 2x 18V ?
5W dummy resistor load -> Any resistance value fine?
" R101,201,301 3 times higher spec than their dissipation (voltage across each x CCS current). *Refer to end of text on how to calculate their Ohmic values. 3-5W spec will usually be enough."
Okay, so the legato presents load of ~ 350 mA, sparing another 100 mA of excess current (is that too much? i stay in a tropical country, ambient temperature is about 30 deg celsius most days) the graph reads about 4.8V. Forward drop of LED array = 2 x 1.9 V?
So [4.8 - (2x1.9)] / 0.3A = R101 value? But from the guide it seems like it's supposed to be the other way round instead -> LED array V drop minus graph voltage. So i'm obviously calculating the LED array V wrongly...
I'm guessing mine is the older SSLV1.1 board since i don't see any extra 4 LED positions...There are 3 LED positions though D102,103,104. Is that it?
Have a feeling i'm doing this all wrong.. can someone enlighten me please? I went through the guide and Salas recent posts about this a few times but it is all flying past my head.
Cersepn,
I just learn about this, let me practice my maths.
If you only have Dx01, 2 and 3 , it is the old version. Newer one will be Dx01a, 01b, 2 and 3.
The dummy load resistor is calculate by 15V/0.45A=33.3ohm, power dissipate is 15Vx0.45A=6.75W, 5W is not enough. You just need one for testing both + and - board.
R101 should be 0.6V/0.45A=1.3ohm
Have fun.
I just learn about this, let me practice my maths.
If you only have Dx01, 2 and 3 , it is the old version. Newer one will be Dx01a, 01b, 2 and 3.
The dummy load resistor is calculate by 15V/0.45A=33.3ohm, power dissipate is 15Vx0.45A=6.75W, 5W is not enough. You just need one for testing both + and - board.
R101 should be 0.6V/0.45A=1.3ohm
Have fun.
The dummy load should equal the real load for a lifelike test. So its 15V/0.35A=43R. Use 10W cement common type. If the dummy equals the full CCS current available, the reg is going to current starve its other section and won't be setting up voltage. Use 3 1.9V leds and 1.2R 2W setting resistor (R101 etc.) for 0.5A available if you can't find 1.3R.
Thank you, Salas and coolhead.
Is there a typo here? "10000uF/63V 10mm snap-in ''hot-rod''"
I can't find any Nichicon Muse/Panasonic FC/Elna Silmic II 10000uF with 63V, there's only 6.3V,10V, low voltage ratings etc
sg.element14.com/panasonic/eeufc0j103/capacitor-radial-6-3v-10000uf/dp/1848415
Is there a typo here? "10000uF/63V 10mm snap-in ''hot-rod''"
I can't find any Nichicon Muse/Panasonic FC/Elna Silmic II 10000uF with 63V, there's only 6.3V,10V, low voltage ratings etc
sg.element14.com/panasonic/eeufc0j103/capacitor-radial-6-3v-10000uf/dp/1848415
Last edited:
Wonderful!
Where is everyone getting their Pana FC/Nichicon Muse/Elna Silmic 10000uFs at those voltage ratings?
My local farnell doesn't sell those models.. There's only these:
NICHICON|TVX1E103MDD|CAPACITOR, 10000UF, 25V | element14 Singapore
PANASONIC|ECOS1HA103EA|CAPACITOR, 10000UF, 50V | element14 Singapore
NICHICON|LLS1V103MELA|CAPACITOR, 10000UF, 35V | element14 Singapore
PANASONIC|EEUHD1E103|CAPACITOR, RADIAL, 25V, 10000UF | element14 Singapore
Where is everyone getting their Pana FC/Nichicon Muse/Elna Silmic 10000uFs at those voltage ratings?
My local farnell doesn't sell those models.. There's only these:
NICHICON|TVX1E103MDD|CAPACITOR, 10000UF, 25V | element14 Singapore
PANASONIC|ECOS1HA103EA|CAPACITOR, 10000UF, 50V | element14 Singapore
NICHICON|LLS1V103MELA|CAPACITOR, 10000UF, 35V | element14 Singapore
PANASONIC|EEUHD1E103|CAPACITOR, RADIAL, 25V, 10000UF | element14 Singapore
nichicon KG go up that high, silmic don't, they top out at 1000uf in the higher voltages. you can get the nichicon at parts connection, but to be quite honest, for this type of build i'll take high performance industrial grade caps over those. of the ones you've listed i would take the last. oh actually no, with 18vac secondaries that would be a bit close, is there a 35v in the same type?
I have had very good results with Mundorf AG caps for power supplies.
Don't know where you will get them in the USA but in the UK I use hificollective and have done for years. I'm sure Nick already has many customers in the USA and he is very reliable.
Also check out other power caps from Elna but not the Silmic on the same site.
black gate electrolytic capacitors page
Chris
Don't know where you will get them in the USA but in the UK I use hificollective and have done for years. I'm sure Nick already has many customers in the USA and he is very reliable.
Also check out other power caps from Elna but not the Silmic on the same site.
black gate electrolytic capacitors page
Chris
I use this United Chemi-Con 10.000uF/63V Digi-Key Digi-Key - 565-2698-ND (Manufacturer - ESMH630VSN103MR50T)
I'm putting together a split rail -25V-0-+25V for the BA-3 front end which draws per channel 50mA.
I'll go for a 23Vac output per secondary winding rated at 500mA. This should account for voltage drop acrss diodes and headroom for the regulator.
I might as well go for the 3.9 ohm 5W R101 (overkill here perhaps).
10000uF 63V on C105.
Dummy load should be 500ohms for each of the rails at 3W.
Comments please.
Chris
I'll go for a 23Vac output per secondary winding rated at 500mA. This should account for voltage drop acrss diodes and headroom for the regulator.
I might as well go for the 3.9 ohm 5W R101 (overkill here perhaps).
10000uF 63V on C105.
Dummy load should be 500ohms for each of the rails at 3W.
Comments please.
Chris
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