any sop on the bass fix? 2009/3/4 Joerg Reisenweber <jo...@openmoko.org>: > Am Mi 4. März 2009 schrieb Helge Hafting: >> Joerg Reisenweber wrote: >> > Am So 11. Januar 2009 schrieb Alexandre Ghisoli: >> >> Le Sun, 11 Jan 2009 19:07:40 +0100, >> >> Konstantin <chaosspaw...@gmx.net> a écrit : >> >> >> >>> Matthias Apitz schrieb: >> >>>> Hello Christoph, >> >>>> >> >>>> Could you please also make an offer for the hardware buzz fix in DE: >> >>>> http://people.openmoko.org/joerg/GSM_EMI_noise/big-C_rework_SOP_rc2.pdf >> >>>> Would be great! >> >>>> >> >>>> Thx >> >>>> >> >>>> matthias (one of your happy GTA02 customers) >> >>> I second this one - offering the hardware fix for the freerunner >> >>> would be great :) >> >>> >> >>> Regards, >> >>> Konstantin (One of your other happy GTA02 customers ;) ) >> >> Yes, hardware fixes (rework) made by resellers would be great. >> >> >> >> By fixes, I mean : >> >> >> >> * GPS - SDIO fix (add a capacitor if I remember correctly) >> > There's a sw-fix for that, which mostly "just works" >> > >> >> * Add a GSM IR resistor for deep sleep >> > Huh? >> > >> >> * Change the led transistor power hungry stuff >> > Guys, this has been fixed for *ALL* FR ever sold!!! >> > >> >> * fix the GSM buzz >> > ok, agree here. >> > >> >> If I ship the phone somewhere to have a technician fix the buzz, I >> definitely want the "small capacitors on headset output" issue fixed too. >> >> The capacitor, combined with the resistance of earphones, form a >> high-pass filter. >> >> The cutoff frequency is 1/(2*pi*R*C), where R is headphone resistance >> and C is the size of the capacitor. The capacitor in the FR has been >> reported as 1 microfarad. My headset is about 40 ohm, which gives a >> cutoff frequency of about 4kHz. >> >> At 4kHz the sound is halved, and drops by 6db per octave below that. >> Above, the sound is almost normal. Unfortunately, most of the sound we >> hear is below 4kHz. >> >> A headset usually works down to about 20HZ. If I want the cutoff >> frequency there, a 200 microfarad capacitor is needed. >> >> Is there a plan for such a fix as well? >> >> Helge Hafting > > Hey, you copied my mail from ~1year ago ;-) > /j > > _______________________________________________ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community > >
-- David Reyes Samblas Martinez http://www.tuxbrain.com Open ultraportable & embedded solutions Openmoko, Openpandora, GP2X the Wiz, Letux 400, Arduino Hey, watch out!!! There's a linux in your pocket!!! _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community