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Old 15th October 2002, 11:43 AM   #1
protos is offline protos  Greece
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Default Bosoz psu question

Can I use 2X55V trfos for 60V rail voltages or should I go down to 50V rails. Can't seem to find 2x60V trafos or small 2X30V trafos.
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Old 15th October 2002, 12:22 PM   #2
Ren is offline Ren  United States
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protos,

Plitron has an 80 VA, 60V + 60V toroidal transformer; I just ordered one for building a BoSoZ. Their part number for that part is 037052201.

Ren
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Old 15th October 2002, 12:38 PM   #3
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protos

The 2 x 55V transformer will work perfectly.
If you are going to throw it away, I would like
to let you know my address.
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Old 15th October 2002, 01:29 PM   #4
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Hello,

The 55 V trafo can be used.
The BOSOZ will work well even with lover voltage.

If you sometimes can't find the transformer with the desired
voltage, than try to ask around the shops if they can custom made it for you.

Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
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Old 15th October 2002, 05:09 PM   #5
wchick is offline wchick  United States
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I used one 80VA, 55+55V transformer from Avel Lindberg for my BOSOZ. It works pretty good and the rail voltage is 60V.


Wallace
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Old 15th October 2002, 06:31 PM   #6
skaara is offline skaara  Slovenia
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With 55V you still have around (-)75V on the drains of mosfets in psu so you have 10-15V reserve, that should be enough..
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Old 25th November 2002, 03:28 PM   #7
JDeV is offline JDeV  South Africa
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Default Another PSU question.

Here in South Africa our 220v mains are actually 235v. Now instead of getting 80v D.C. after my rectifier , I get 90v.
Questions:
1. Is this a big problem?
2. If so, can I just add another zener to the pack, each side?
3. Must I use 7 x 9.1v zeners, or can I use for instance 5 x 12v zeners?
4. On my Aleph30, still waiting for transformer, I must have 25v on rails, but will now have 30v, any problem with this?

Thanx to all.
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Old 25th November 2002, 03:34 PM   #8
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No

Yes

No / Yes

No

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Old 25th November 2002, 03:39 PM   #9
JDeV is offline JDeV  South Africa
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If that isn't short and sweet I still want to see short and sweet.

Thank you sir.

(And it was lighting fast )
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