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Old 16th April 2009, 11:20 PM   #701
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Hi Christian -

Do you have parts suggestions or BOM for your Rectifier Bridge boards???

Thanks,
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Old 17th April 2009, 05:46 AM   #702
cviller is offline cviller  Denmark
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Diodes, use any three legged with Anode Cathode Anode legs. Example:
http://www.mouser.com/Search/Product...2fWe128j0pc%3d
(you can also use two legged, but then you need to bend the legs slightly)

Heatsinks, if you want to use onboard sinks use these:
http://www.mouser.com/Search/Product...GKJGAHIA%3d%3d

For the snubbers (resistor and capacitor) you can use 100ohm and capacitors in the 20-100nF range.

And of course you will need to buy 4 of each for one board.
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Old 17th April 2009, 02:48 PM   #703
RonD2 is offline RonD2  United States
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Hi Christian,

I'm hoping someone can help me troubleshoot my F5. The amp (built with your boards) has worked fine for many months. Sounded great in fact. Suddenly while playing music it stops and begins to buzz in both channels.

A quick check shows the 24v DC at the outputs. No visible damage to the boards but I can't keep it powered on for more than 20 sec or so.

What would be the best way to proceed? Thanks in advance.

Ron
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Old 17th April 2009, 03:15 PM   #704
cviller is offline cviller  Denmark
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What happens after 20 sec? (don't connect speakers)

Do you have replacement components?

You have to start trouble shooting. If nothing burns when it is on, you can start to measure voltages - otherwise you have to figure out which component is shorting the whole thing (you solder out the power fets).
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Old 17th April 2009, 05:41 PM   #705
RonD2 is offline RonD2  United States
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No speakers connected. Tested with inputs shorted and open. After 20 sec I start to smell burning. Power supply tests ok when disconnected.

I do have a second set of boards and components. I will build those while I troubleshoot these.

What doesn't make sense to me is that something happened to both boards at the same time.
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Old 17th April 2009, 05:44 PM   #706
cviller is offline cviller  Denmark
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Did you lose the negative rail?
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Old 17th April 2009, 05:59 PM   #707
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Quote:
Originally posted by cviller
Yes, I have psu, rectifier and f5 boards.


Great! I just ordered a PSU and 2 of the rectifier PCB's.

Thanks!
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Old 17th April 2009, 06:18 PM   #708
cviller is offline cviller  Denmark
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Quote:
Originally posted by strider75



Great! I just ordered a PSU and 2 of the rectifier PCB's.

Thanks!
Cool - I can see that.

I'll send the orders on Sunday.
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Old 17th April 2009, 06:22 PM   #709
RonD2 is offline RonD2  United States
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I will check again but I don't think so (+/- 24 V).
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Old 17th April 2009, 09:59 PM   #710
smyslow is offline smyslow  Europe
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Hi Christian,

just sent you an order about some F5 and PSU boards.

Thanks for your effort.

smyslow
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