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Old 9th April 2018, 08:25 PM   #2641
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Aleph-X builder's thread.
18W at T0220 is too much for my liking
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Old 10th April 2018, 05:26 AM   #2642
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9W ? (If I double mosfets)
How much would you sugest per mosfet ?
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Old 10th April 2018, 07:56 AM   #2643
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Aleph-X builder's thread.
9W is better figure

or just use IRFP240

use schematic of my Babelfish JX , along with servo and you're in game
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Old 10th April 2018, 08:05 AM   #2644
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jea... I understand what you mean, but I would like to keep this on budget, use the parts that I have...
If I would nead to buy new toroid it will be like additional 70euro

will have to think

thanks for advices, I realy apreciate it
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Old 10th April 2018, 08:10 AM   #2645
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Quote:
Originally Posted by Zen Mod View Post
9W is better figure

or just use IRFP240

use schematic of my Babelfish JX , along with servo and you're in game
you mean this one ?
https://www.zenmod.in.rs/wp-content/...J-shrinked.jpg

you could not do it any more complex ?
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Old 10th April 2018, 08:10 AM   #2646
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Aleph-X builder's thread.
I'm not saying anything for Donut and voltages ...... just saying what's better for you

with IRFP , one per quadrant , you hardly need proper matching ...... while with IRF you must double them , if you wish nice sleep

also , servo is everything but complicated

for input , if you don't have 2SJ , try finding J271 (or smd iteration of ) , buy them dozen or two and you'll find two pairs

aha , emiter follower between LTP and outputs is well worth trouble .....
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Old 10th April 2018, 08:24 AM   #2647
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will start to collect parts
used to have metched jfet but have sold them as I didn't plan to make any more amps
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Old 10th April 2018, 09:30 AM   #2648
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Aleph-X builder's thread.
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Originally Posted by yoke View Post
you mean this one ?
https://www.zenmod.in.rs/wp-content/...J-shrinked.jpg

you could not do it any more complex ?

that's damn simple , if you ask me

few additional parts comparing to common DiyA Aleph X , but works as charm
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Old 12th April 2018, 10:59 AM   #2649
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would J74BL with Idss 10.5 to 11.2mA work ?

I can get 2sj109BL but I think it would be painfull to instal it on the original green PCBs
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Old 12th April 2018, 11:06 AM   #2650
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Aleph-X builder's thread.
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Originally Posted by yoke View Post
Zen
would J74BL with Idss 10.5 to 11.2mA work ?

..
of course

they're biased via CCS , so no problem with broad range of Idss
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