Author Topic: volt modding USB BELKIN F5D7051 ?  (Read 5431 times)

Re:volt modding USB BELKIN F5D7051 ?
Reply #30 on: January 30, 2008, 18:39:41 PM
cheers .. there has to be something limiting power cos it should have tryed to fry by now .. only thing i can think of is disabling the power sensing section if i can, might be dropping the controled curent to compensate with the mod .. gonna have to read up more  

maybe i could alter that instead and trick it into feeding more v

i mean if it fryed from over voltage id know id be on the right track

volt modding USB BELKIN F5D7051 ?
Reply #31 on: January 30, 2008, 19:00:27 PM
Use a different USB header to provide your extra voltage

Re:volt modding USB BELKIN F5D7051 ?
Reply #32 on: January 30, 2008, 19:12:19 PM
i dont think thats gonna make a diffrence im pulling direct of the socket atm ...just been reading this

http://www.patentstorm.us/patents/6603350-description.html

recon im gonna have to trick the power detector, its detecting slap bang in the middle of the amp


Re:volt modding USB BELKIN F5D7051 ?
Reply #33 on: January 30, 2008, 19:30:23 PM
looking at this if im reading it right? i basicly stick a real high resistor before the sensor so it doesnt pick anything up?

just realised unfortinuatly thats all embeded .. gonna have to figure out the feedback circit ........grrrrrrrr


Re:volt modding USB BELKIN F5D7051 ?
Reply #34 on: January 30, 2008, 22:57:56 PM

from what i can gather adding more v to the output should have done it. tryed that didnt do squat ..

so well stuck now anyone got any ideas?

volt modding USB BELKIN F5D7051 ?
Reply #35 on: January 30, 2008, 23:13:35 PM
I stand by my previous posts.

  • Offline lac

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Re:volt modding USB BELKIN F5D7051 ?
Reply #36 on: January 31, 2008, 02:39:48 AM
f u can figure out the feedback circuit and find out the value of the feedback resistor you might be able to increase the gain of the final stage.

  • Offline Serious

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Re:volt modding USB BELKIN F5D7051 ?
Reply #37 on: January 31, 2008, 02:57:32 AM
If hes really good hell stick a pan on top and cook some eggs and sausage when hes finished ;)

Re:volt modding USB BELKIN F5D7051 ?
Reply #38 on: January 31, 2008, 09:10:01 AM
Quote from: lac
f u can figure out the feedback circuit and find out the value of the feedback resistor you might be able to increase the gain of the final stage.


there is a 0.5 ohm resistor after the pd out ive stuck 0.4v before it and that didnt do anything


Re:volt modding USB BELKIN F5D7051 ?
Reply #39 on: January 31, 2008, 10:02:30 AM
it must be feeding back to the bcm2050 at some point but i cant find a data sheet on it .. so well stuck on manipulating the feedback atm


Re:volt modding USB BELKIN F5D7051 ?
Reply #40 on: January 31, 2008, 12:59:11 PM
Quote
The BCM2050 is only capable of 5 dBm


of this forum
http://www.dslreports.com/forum/remark,11569610

and the only thing i can come up with now is this




the SE2521A60 has a max recomened input of 2dbm tho .. so cant really up the power much that way . and as i cant find pin data on the bcm2050 i think this is a dead end now .. grr nightamre . only way to get data sheet is from broadcom themselfs and i dont thik there gonna give it to me, it seams to be well hush hush stuff no site has any data sheets on it



  • Offline lac

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Re:volt modding USB BELKIN F5D7051 ?
Reply #41 on: February 02, 2008, 00:17:07 AM
check for feedback resistor at pin 18 and 21 going to pin 6, if their is a resistor their, try to increase its value to 2x to 10x, if its not working or their is none their, then the gain must be fixed and embeded.you can also try making ur own feedback its worth a try.

Re:volt modding USB BELKIN F5D7051 ?
Reply #42 on: February 02, 2008, 09:12:15 AM
Quote from: lac
check for feedback resistor at pin 18 and 21 going to pin 6, if their is a resistor their, try to increase its value to 2x to 10x, if its not working or their is none their, then the gain must be fixed and embeded.you can also try making ur own feedback its worth a try.


ant_B at pin 18 isnt even connected to anything .. ant_A at pin 21  has a resistor inline with it and thats about it, not sure its working the feedback from there, the gain shoudnt be fixed because thats what the power dectector is for to throtle the power ... although changing the power to 25% from 100% in setting seams to make no difrence .. so might be fixed .. or there is a voltage comparitor its using somewhere to fix the voltage .. but without having all the data sheets im never gonna know ..... think its a dead end now .. well on this usb anyhow

but i did find this http://www.solwise.co.uk/wireless-indoor-wl-ipa2.4-booster.htm
they also sell amps up to 4watt but i wount go that far


also found this about homemade amps
http://www.zero13wireless.net/foro/showthread.php?t=254

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