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Old 20th August 2009, 06:36 AM   #1
qboneus is offline qboneus  United States
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Question Question about proper orientation of Q5,Q6 F5 driver board

cviller board rev 1.0, has markings blacked out.
contrary to board markings using my meter it would appear the proper orientation of a ZTX550/ZTX450 in Q5/Q6
http://www.diodes.com/datasheets/ZTX550.pdf
http://www.diodes.com/datasheets/ZTX450.pdf
would be like this??
Click the image to open in full size.
Click the image to open in full size.
but not sure...
can someone with experience advise me?
Don't want to solder till i'm 100%
thanks for your help.
tal
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Old 20th August 2009, 06:54 AM   #2
toufu is offline toufu  United States
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You are right, CViller's board is footprinted for BCS transistors which has the opposite orientation of the ZTX transistors. It's mentioned in his F5 build guide. Also, you might want to remove the current limit circuit which includes these transistors after you get it working. It sounds better.
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Old 20th August 2009, 05:37 PM   #3
qboneus is offline qboneus  United States
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Thanks very much, I thought they must need to be postitioned this way; but just wanted to see if i was more confused than usual.
thanks for the info and opinion; i'll look into the current limit mod after i get her running.
cheers,
tal
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Old 20th August 2009, 08:00 PM   #4
cviller is offline cviller  Denmark
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qboneus, did my mails to you end up in your spam folder?
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