SMF for DIYStompboxes.com!
Started by Paul Marossy, February 19, 2009, 11:37:41 AM
Quote from: Govmnt_Lacky on January 23, 2012, 01:06:31 PMSemi-necro post Just wondering if this unit can be run (with the LT1054 charge pump) from a 9V battery.Using the recommended components from the moosapotomus build notes (LM324s, LT1054 charge pump, etc.) would it kill a 9V quick or is it a viable addition?Opinions or experiences??
Quote from: Scruffie on January 23, 2012, 01:24:47 PMCurrent draw is around 30mA or something I think? Should last a while on a battery.The LT1054 has a top limit of 100mA so it'll at least last a gig.
Quote from: Fender3D on February 06, 2012, 10:51:11 AMYou need 1/15 15Vcc @ Vgg. (~1V)Any resistors providing the ratio will be OK (in my MXR clone I used 100K + 7K5)
Quote from: Govmnt_Lacky on February 06, 2012, 10:59:13 AMQuote from: Fender3D on February 06, 2012, 10:51:11 AMYou need 1/15 15Vcc @ Vgg. (~1V)Any resistors providing the ratio will be OK (in my MXR clone I used 100K + 7K5)Fender to the rescue!! That is what I was afraid of I can only assume that the 14K is essential to getting the right voltage into Pin 4 of the MN3007. According to the schemo, the V+ (+15V) from the regulator is passing through a 250 ohm resistor then it goes DIRECTLY into Pin 1 AND it goes through the 14K to Pin 4.Now I am thinking that changing the value of R71 (to 15K or 13K) will effect that voltage level going into Pin 4.I guess I will need to get me a 14K resistor OR ruin my picture perfect board with 2 resistors soldered in series
Quote from: Fender3D on February 23, 2012, 10:41:50 AMOtherwise, if it's a gain issue try playing with R28 and R27 (100 ohms is way too low...)
Page created in 0.160 seconds with 21 queries.