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Old 7th October 2011, 10:58 AM   #471
AndrewT is offline AndrewT  Scotland
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Originally Posted by Backbones View Post
Just received the BiB boards from teabag. Looking to power an old Quad FM4 tuner which requires 12V at 30mA
if you plan to use a shunt regulator then the CCS feeding the shunt must deliver more current than the worst case maximum demand of the client circuit (FM4).

If 30mApk is the worst case demand then the CCS should be set for 30+X mA.
X can be any value >=1mA. I would suggest you aim for setting the CCS in the range 60mA to 100mA.

Note that the FM4 has a compartment housing the 3pin regulator. One does not have much room to fit in a BiB.
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Old 8th October 2011, 12:28 PM   #472
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Many thanks.
Has anyone been using the reg for BA-2 front end do we know?
Chris
On borbely mosfet driver stage sound good
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Old 8th October 2011, 12:32 PM   #473
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HI
with 36VA the 63v caps are not too low ? I like 63v parts...

Nick your great build , with separate box, we use two psu caps one x box ...you use the resistor for pgreco filter or just the wire..

thanks
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Old 9th October 2011, 02:53 AM   #474
Salas is offline Salas  Greece
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63VDC parts will be fine.

Just the wire.
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Old 9th October 2011, 01:09 PM   #475
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Can I use this diode VISHAY GENERAL SEMICONDUCTOR|1N5399-E3/54|STANDARD DIODE, 1.5A, 1KV, DO | element14 Malaysia instead of MUR120?
It seems can support higher current and faster as compare to MUR120.
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Old 9th October 2011, 01:55 PM   #476
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Capacitor position C301, 201, 101 is same as C302, 202, 101. Is that to be fill by either a film 4.7-10uf MKT or a 220uf electrolytic cap? And not both? It is the same as position C103, 203, 303 and C104, 204, 304.
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Old 9th October 2011, 05:23 PM   #477
Salas is offline Salas  Greece
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Any diode meeting the power needs will work in the bridges. Your intuition/choice. MUR are well accepted by diyers and easy to find, thus they got proposed.

Those capacitors choices are explained thoroughly in the guide. Those near the output better be MKT plus R107,207,307 1R. 47uF polar caps and that resistor position be a jumper are reserved to battle oscillation if it rarely happens a bad interface to reactive load situation.

The C101,102 etc. Its better the 220uF polar if the application is a high gain or other noise sensitive situation. Else, just an MKT since it normally presents a more open tone. Some had used the polar, and bypassed it underneath with a small MKP.
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Old 10th October 2011, 01:25 AM   #478
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Thanks. I must have over look it when reading the guide.
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Old 10th October 2011, 12:30 PM   #479
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I have ready the regs for +7Vout & -3Vout to feed the Jim Hagerman Piccolo phono headamp that draws 6Vdc to 24Vdc @15mA, how many current have I to adjust? 100mA seems to be very reasonable for the Piccolo, right?
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Old 10th October 2011, 01:11 PM   #480
Salas is offline Salas  Greece
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Right, but adjust 150mA for the reg to be warmer.
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