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Old 19th October 2017, 05:56 AM   #21
PRR is offline PRR  United States
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Thank you very much for the elect-tech fiction(?).

I believe it may be a useful genre. I have not got as far as sketching one. I will note that Gus' Garage in Popular Science gave good (car) tech lessons in story form. Also I believe POWER magazine around 1910 published some extensive explanations of hydrodynamics in the form of un-edjucated dialect between the Old Guy and the New Kid.

I object that it has no Dames, no Guns, and no Murders. Unless the "beginners" end up murdering MOSFETs by not understanding the bias instructions. What is "P1 minimum setting"? Left? Right? Facing which way? I could see wrong-way leading to 4 Amps and 60 Watts dissipation-- quick death. _I_ think it should self-adjust, but resistor is wasteful and when I added a NPN servo it complicated the plot.
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Old 19th October 2017, 08:16 AM   #22
xrk971 is offline xrk971  United States
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Thanks for the great story, and the tip on where to get big fat Hammond inductors for a reasonable price. This is much more compact and less expensive than the spool of wire.

193V Hammond Manufacturing | Mouser
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Old 19th October 2017, 08:28 AM   #23
dimkasta is offline dimkasta  Greece
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Quote:
Originally Posted by Soundhappy View Post
IRFP240 is the horse not IRFP250.
It could be because of the increased Ciss on the 250s
A buffer in front of it should make the comparison fairer
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Old 19th October 2017, 08:52 AM   #24
dimkasta is offline dimkasta  Greece
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FABs can also use 195R10 or even 195R20 to match their plutonium-powered PSUs

195R20 Hammond Manufacturing | Mouser Greece
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Last edited by dimkasta; 19th October 2017 at 08:57 AM.
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Old 19th October 2017, 09:02 AM   #25
Ralph G is offline Ralph G  Netherlands
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I'm no expert, but if do some quick calculations, I don't think a lot of inductance is needed. Won't a Hammond 159ZE be a good and cheap solution?

28mH should have a -3dB at 5Hz. And this one can take upto 3A. Only 19 euro's.

Edit: or use two of these in parallel. Or the 159ZC in parallel. A lot of inductance and current capacity....

Last edited by Ralph G; 19th October 2017 at 09:11 AM.
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Old 19th October 2017, 09:07 AM   #26
Puffin is offline Puffin  United Kingdom
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Are there any boards available for this yet?
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Old 19th October 2017, 09:11 AM   #27
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by dimkasta View Post
It could be because of the increased Ciss on the 250sA buffer in front of it should make the comparison fair
Good point Dimkasta yes, I do need to try with IRFP250 to understand why is optimal for MOFO.
Maybe Santa brings me some gift from Mouser in December

Quote:
Originally Posted by dimkasta View Post
FABs can also use 195R10 or even 195R20 to match their plutonium-powered PSUs
Haha yes for Super Dude Ultimate MOFO

193T is 4 times less heavy and 2 times less pricey if compared with 193V
193T Hammond Manufacturing | Mouser France
http://www.mouser.com/ds/2/177/5c0033-71126.pdf
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Old 19th October 2017, 09:18 AM   #28
Ralph G is offline Ralph G  Netherlands
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I have read the post 27 of Soundhappy an hour ago. And I just posted my post (10 minutes ago). But for some reason my "new" post is 25, and the "old" Soundhappy post is 27.

And my post has a 9 AM time stamp (it is 11 AM over here).

Edit: partly answer from the bottom of the page: All times are GMT. That explains the time stamp. But not the post numbering. Never mind.

Last edited by Ralph G; 19th October 2017 at 09:28 AM.
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Old 19th October 2017, 09:38 AM   #29
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by Ralph G View Post
I have read the post 27 of Soundhappy an hour ago. And I just posted my post (10 minutes ago). But for some reason my "new" post is 25, and the "old" Soundhappy post is 27.

And my post has a 9 AM time stamp (it is 11 AM over here).
All OK edited my post for additional commentaire naturally number is changed. Have a nice day
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Old 19th October 2017, 09:54 AM   #30
Ralph G is offline Ralph G  Netherlands
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Quote:
Originally Posted by Puffin View Post
Are there any boards available for this yet?
You want a PCB for this design

I've made an inverted-mini-aleph without one

I always use proto boards with 3 connected islands. These are brilliant. Roth RE310 for instance.

Last edited by Ralph G; 19th October 2017 at 10:03 AM.
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