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An illustrated guide to building an F5
An illustrated guide to building an F5
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Old 24th March 2020, 06:11 AM   #1311
Kosst Amojan is offline Kosst Amojan  United States
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After breaking my F5 down into a pair of monoblocks, I managed to fry the outputs in the one amp. Not sure how I did it exactly. I was aiming for about 1.55 amp bias. Was this a totally stupid idea? The things were barely getting hot. I've got more parts on the way, but I'd really like to avoid repeating this stupid mistake.
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Old 24th March 2020, 10:04 AM   #1312
JeffYoung is offline JeffYoung  Ireland
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An illustrated guide to building an F5
What's your rail voltage?
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Old 24th March 2020, 04:34 PM   #1313
Kosst Amojan is offline Kosst Amojan  United States
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32 volts. I'm using a 4U chassis, one device per heatsink.
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Old 24th March 2020, 07:07 PM   #1314
chiily is offline chiily  United Kingdom
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Quote:
Originally Posted by Tomcat1969 View Post
I think it's gonna be ok.

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Top post!
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Old 24th March 2020, 07:43 PM   #1315
JeffYoung is offline JeffYoung  Ireland
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An illustrated guide to building an F5
32V @ 1.55A is 50W. That's a lot, but not immediate-destruction levels....
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Old 24th March 2020, 08:18 PM   #1316
Kosst Amojan is offline Kosst Amojan  United States
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32V @ 1.55A is 50W. That's a lot, but not immediate-destruction levels....
That was my thinking too. They're on huge heatsinks and weren't getting anywhere near warm enough not to touch for any length of time. They were clearly making good contact with the heatsinks. I'm thinking I'm going to aim for 1.45 amp and go with that for a while and see how the old pair in the other amp hold up. They're idling just fine at about 1.55 amp even after letting it cool and powering it on a few times. Thinking I might have had a weak part that just gave up and took the other one out with it.
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Old 24th March 2020, 09:01 PM   #1317
brianco is offline brianco  Ireland
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Old Yesterday, 09:54 AM   #1318
Allvey is offline Allvey  Portugal
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Default Another F5 ready to rock n' roll!

F6 and M2X are next… can’t stop the fun





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Old Yesterday, 12:28 PM   #1319
carsten.witt is offline carsten.witt  Germany
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Nice Front!
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Old Yesterday, 01:06 PM   #1320
McQuaide is offline McQuaide  United States
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F6 and M2X are next… can’t stop the fun

Sweet - what are the boards on either side of the transformer?
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