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Old 17th February 2012, 08:25 PM   #231
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Only P3 missing for turbo V1 + one thermistor leg change.

Diodes can be hardwired for V2

Not too bad. Even cascoding is present.
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Old 17th February 2012, 08:34 PM   #232
Variac is offline Variac  United States
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Excellent.. Thanks for the report. Yeah, that's why I mentioned the F-5c. "c" for cascoding. Plus it has 4 output devices rather than the standard two.
If someone does this please post it for all to see! We need the P3 mod shown at a minimum, because that's become the standard F-5 it seems.

Last edited by Variac; 17th February 2012 at 09:12 PM.
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Old 17th February 2012, 09:02 PM   #233
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About P3, i suggest to hardwire it during tweaking then measure and replace R3 & R4 source resistors by fixed values.
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Old 18th February 2012, 02:20 AM   #234
crt is offline crt  Indonesia
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Maybe someone else than me need Layout for V1
it's single layer with one jumper, mirrored for each channel

Basically its same as my F5 Juma Version
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File Type: pdf F5 Turbo Atas.pdf (31.7 KB, 179 views)
File Type: pdf F5 Turbo Bawah.pdf (151.6 KB, 171 views)
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Old 18th February 2012, 09:48 AM   #235
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Quote:
Originally Posted by crt View Post
Maybe someone else than me need Layout for V1
it's single layer with one jumper, mirrored for each channel

Basically its same as my F5 Juma Version
Hi there
I Like it
did you calculate the track current and temperature rise

I did same for the F5 turbo PCB
Only track worth doing is the speaker out, simplified from most distant mosfet pin to Output therminal 120mm (need lengt of trak for your board)
Taken ambient at 25 c and track temperature rise to 5 and 10 C
for 1 once and 2 ounces copper boards Ambient themperature be the themperature inside case close to sink
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Old 19th February 2012, 09:25 PM   #236
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Is there any chance you guys could start some random chattering, debate, or discussion about this just to give me something to read? I'm studying for medicine and histology exams, and whenever I hit the refresh button no one's said anything since yesterday. I know, strange request from a bleary-eyed student who hasn't had enough sleep...

Austin
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Old 19th February 2012, 09:40 PM   #237
ungie is offline ungie  Canada
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Is this an appropriate place to start talking about part selection, part sourcing, mosfet matching, etc.? If not maybe it's time to start an F5 Turbo builders thread, even though it will be a while before I get boards designed and the thing built. I'm planning a monoblock version with ~+/-48V rails.
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Old 19th February 2012, 09:43 PM   #238
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I agree that an F5 Turbo builders thread would be useful.
I've already created my BOM's (see my sig).

I was thinking of a 30-0-30 supply which should give about 42-0-42 regulated.
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Old 19th February 2012, 09:56 PM   #239
ungie is offline ungie  Canada
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F5 Turbo Builders Thread started here: F5 Turbo Builders Thread
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Old 19th February 2012, 10:15 PM   #240
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Ah ok, I had thought this was to become to main F5 thread. Thanks guys.
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