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PeeCeeBee V4H GB

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#302
Thanks Shaan your kindly reply.
Your info is invaluable.
Somehow i find few circuit design will use individual frontend psu . However i am not sure how the best to the sound and what listening feel would be changed. So i want to do a trial and compare. Anyway diy is like my this behavior. 😀
 
#307
shaan said:
Hi Patrick.

For V4H +/-56V PSU with at least 10,000uF per rail is good for one channel.
Click to expand...

Hi Shaan,
working backwards this would mean a toroidal transformer with secondary windings at 40VAC-0-40VAC. (giving a rail voltage of approx 55.6VDC)

I just want to confirm that I can use the 63VDC rail capacitors ie 10000uF in the PSU, or do I need to go to a higher capacitor voltage rating.
kind regards
stevet
 
#311
craydive said:
silicon diodes for full wave rectification say 0.6V x 2, so the voltage drops by 1.2V.
so now 55.4VDC-ish.
Thanks Pieter, I should have thought more about it.
Click to expand...
Don't forget B of the transformer. Mine have a given and measured B of 1.08 so I have to start calculating from 40V * 1.08 = 43.20 V.
Results f.e.g. in 43.2V * 1.414 = 61.08V - 1.2 V = 59.88 V (without load).

(Also my diodes differ from fact-sheet: given 0.72 V so I should have 1.435 V. But measured 1.54 V.)

Simulated load of the whole PSU with power-resistors results in a voltage drop of 5.7V.

So I would get 59.88 V - 5.7 V = 54.18 V if the mains-voltage of 230 V would not vary from 207 V to 253 V (± 10%).


So theoretical I can get the min. value or the max. value:
min.: 48.76 V (-10%) / max.: 59.6 V (+10%).
 
#319

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