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Old 12th June 2007, 06:12 AM   #1
jarthel is offline jarthel  Australia
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Default psud2 question and Fi Primer's 211 circuit

I have a feeling that if a transformer is rated 370-0-37, I need to enter 370 RMS in PSUD2. is this correct?

If yes, read on!

I am somewhat baffled by the power supply on the 211 circuit from Fi Primer. http://www.simpletube.com/databank/S...7_6SN7_10K.gif

how can you get 900+V out of a 370-0-370 secondary?

I tried modelling a similar power supply in PSUD2 (do not know about output current so I used 100ma) and the max I can get is 500+V and even lower output voltage at higher current.

any ideas?

thank you.
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Old 12th June 2007, 06:44 AM   #2
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Your question has no relevance to PSUD. It's a good idea to understand the basics before attempting simulation. As used in the Fi Primer the transformer is a 740v as both windings are in series and the midpoint not connected.
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Old 12th June 2007, 06:52 AM   #3
jarthel is offline jarthel  Australia
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Quote:
Originally posted by analog_sa
As used in the Fi Primer the transformer is a 740v as both windings are in series and the midpoint not connected.
well looking at the schematics as I have linked, there seemed to be only 1 secondary and that is 370-0-370.

thank you for the help
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Old 12th June 2007, 07:33 AM   #4
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My reply came out too harsh. Sorry.

What i really mean is that using a simulation software is easy but often just wrong. If you open any basic electronic textbook you will immediately figure out that the PS used is a bridge rectifier and although the transformer has a centre tap, if not connected the entire denomination of 370-0-370 is quite pointless. It simply becomes a 0-740v.
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