Loading Piezo Tranducers

Started by thehallofshields, February 22, 2015, 05:55:10 PM

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Quackzed

#20
i double checked the current draw info, looks more like .1 ma ish...   :icon_redface: still very low for either... might have to change the battery once every few years, rather than once every decade!  ;) (as long as you turn it off when not in use,either a switch or a stereo jack type power switching scheme used in most pedals...)

nothing says forever like a solid block of liquid nails!!!

thehallofshields

Okay, so for a dual opamp in buffer mode, and a Common Source JFET with a gain of 3 I'm looking at under 0.5mA on a cheap 500mAH battery. That's pretty good any way you slice it.

bool

Quote from: Quackzed on March 27, 2015, 10:00:51 AM
i double checked the current draw info, looks more like .1 ma ish...   :icon_redface: still very low for either... might have to change the battery once every few years, rather than once every decade!  ;) (as long as you turn it off when not in use,either a switch or a stereo jack type power switching scheme used in most pedals...)

I have changed the battery in my customized RD 727's boost/buffer in autumn 2008. Still works, and I play it a couple times a week. When I was gigging in 80's and 90's I changed batteries once a year - not because it was necessary, but just for the sake of "freshness" and peace of mind if you know what I mean.

My then "studio" bass ate a pair of batteries every two months ... but it made me money ... so it was a calculated risk if you looked at it from a certain angle.

thehallofshields

How do you guys think a simple Capacitor Blend for Bass Attenuation would work out between a Mix-Pot and the Tillman. I imagine some messy interaction.

Dual Opamp -> 100k Mix -> 100k Bass -> JFET