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F5 Turbo Builders Thread
F5 Turbo Builders Thread
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Old 2nd July 2019, 04:29 PM   #5661
jonparkhurst is offline jonparkhurst  United States
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Quote:
Originally Posted by Zen Mod View Post
you can skip that XYZ thingie
You are the one who told be to be careful and pay attention so I don't lite myself up. Please tell me why I dont need it so I can be smarter..

JP
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Old 2nd July 2019, 04:45 PM   #5662
Zen Mod is offline Zen Mod  Serbia
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F5 Turbo Builders Thread
that's mains filter thingie , not strictly necessary in audio amp
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Old 2nd July 2019, 06:30 PM   #5663
elwood625 is offline elwood625  United States
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jonparkhurst - I used Mouser P/N 598-333MSR630K
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Old 13th July 2019, 07:19 PM   #5664
elwood625 is offline elwood625  United States
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Progress, heat sinks drilled, taped and anodized in black. Amp boards with MOSFETS and diodes installed and soldered.
I made L brackets to attach the front panel to the heat sinks.

Now for the front and back panels along with top and bottom panels, more drilling and taping.
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Old 13th July 2019, 07:59 PM   #5665
hiwattnick is offline hiwattnick  United States
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Beautiful job with the boards and the panels!
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Old 14th July 2019, 12:52 PM   #5666
JeffYoung is offline JeffYoung  Ireland
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F5 Turbo Builders Thread
Nice job!

(Although that first picture is like a bad acid trip....)
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Old 20th July 2019, 02:00 PM   #5667
daniii88 is offline daniii88
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Hi guys,


been running my F5t v2 for about 1,5 years now without any issues...
Recently, I bought a Analog Discovery 2 USB scope in order to adjust 2nd harmonics over P3 and so by change started to make different measurements.
My right channel clearly has a big problem... as you can see, the square wave responce is pretty messed up and I have no clue what is the problem here... Sinus looks normal (except the left and right channels have slightly different output voltages). Is it caused by parasitic oscillations?

Please help!


Daniel
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Old 21st July 2019, 04:14 AM   #5668
johnhenryharris is offline johnhenryharris  United States
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Hi Daniel,
If you look at the schematic for the F5T v3 you will see compensation capacitors C3 and C4. You could try added them to help with your over shoot problem. Anywhere for 10 to 30 pf should do it. Add and look with the oscope at 10 kHz and 20 kHz.
Good luck.
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Old 21st July 2019, 11:17 AM   #5669
daniii88 is offline daniii88
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I checked the board and have C3 C4 already installed. Any other suggestions?
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Old 21st July 2019, 04:54 PM   #5670
Bfpca is offline Bfpca  Canada
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F5 Turbo Builders Thread
Double check the value of resistors and caps in the circuit. It’s odd that one channel is fine and the other not. Seems like there could be a component value that is off. Verify that there are no big differences between the 2 channels in the connections to the ps, chassis ground, input and output connections.
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