Re: earth sound research graphic fuzz vero layout
Posted by tabbycat on
URL: http://guitar-fx-layouts.238.s1.nabble.com/earth-sound-research-graphic-fuzz-vero-layout-tp19882p19885.html
thanks for your suggestions re the layout. am relatively new to this but got help from wiser heads than mine at fsb re getting it to verified stage. but finesse is an ongoing consideration.
as to my rationale, though the cutting under odd unused pins may seem 'bold practice' it does serve a dual fail-safe purpose of not allowing me to accidentally solder an ic pin in that isn't actually part of the circuit. feral but fair.
re the cutting off of ic pins... i say cut, i mean bite.
actually there is a mod suggested by larsjm at fsb re taking the unused legs to ground:
"To get the most out of this pedal, you also need to install an offset null control for the 741. This can be done with a 10k linear pot connected to pins 1 and 5, with the wiper to ground. This gives you tons of control over the fuzz sound, and IMHO is more effective than the filter control. In fact, on mine I just leave the filter on full and tune it with the offset null control. Lots of great, gated, sputtery fuzz sounds there!"
but i haven't tried it. but that would be a reason to keep the pins available.
if it were any more than three pins on an eight pin chip then i think i would try to solder them down for stability and cut to remove from the circuit.
but i know where you are coming from and am glad for the feedback.
feral.
URL: http://guitar-fx-layouts.238.s1.nabble.com/earth-sound-research-graphic-fuzz-vero-layout-tp19882p19885.html
hey silver blues. am sure i know your username from elsewhere? i'm everywhere, like cat hair.The cut under pin 1 can be moved one column to the right, the cut under pin 5 can be moved to the right two columns and the cut under pin 8 can be moved to the right one column. You'll then need to put a cut somewhere between pins 4 and 5. This eliminates the need to make cuts right under IC pins or *gasp* cut the legs off op-amps
thanks for your suggestions re the layout. am relatively new to this but got help from wiser heads than mine at fsb re getting it to verified stage. but finesse is an ongoing consideration.
as to my rationale, though the cutting under odd unused pins may seem 'bold practice' it does serve a dual fail-safe purpose of not allowing me to accidentally solder an ic pin in that isn't actually part of the circuit. feral but fair.
re the cutting off of ic pins... i say cut, i mean bite.
actually there is a mod suggested by larsjm at fsb re taking the unused legs to ground:
"To get the most out of this pedal, you also need to install an offset null control for the 741. This can be done with a 10k linear pot connected to pins 1 and 5, with the wiper to ground. This gives you tons of control over the fuzz sound, and IMHO is more effective than the filter control. In fact, on mine I just leave the filter on full and tune it with the offset null control. Lots of great, gated, sputtery fuzz sounds there!"
but i haven't tried it. but that would be a reason to keep the pins available.
if it were any more than three pins on an eight pin chip then i think i would try to solder them down for stability and cut to remove from the circuit.
but i know where you are coming from and am glad for the feedback.
feral.
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