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I designed an active volume pedal circuit - dual buffer with isolated tuner out. Details in comments : r/guitarpedals
![File:Build a buffer - step 5. OP-amp, battery cables & signal connections added (1999-06-01 14.26.59 by germanium).jpg - Wikimedia Commons File:Build a buffer - step 5. OP-amp, battery cables & signal connections added (1999-06-01 14.26.59 by germanium).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/f/fd/Build_a_buffer_-_step_5._OP-amp%2C_battery_cables_%26_signal_connections_added_%281999-06-01_14.26.59_by_germanium%29.jpg)
File:Build a buffer - step 5. OP-amp, battery cables & signal connections added (1999-06-01 14.26.59 by germanium).jpg - Wikimedia Commons
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Amazon.com: JOYO Buffer Pedal Effect Built-in Double Buffer Groups and Boost for Electric Guitar Bass Bypass High-end Edition Dr.J Series (D57) : Musical Instruments
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Amazon.com: IK Multimedia Z-Tone Buffer Boost Guitar preamp Pedal with Boost, Active/Passive Pickup selector, switchable Pure/JFET Channels, True Bypass and DI Out for reamping/Live use : Musical Instruments
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Creation Audio Labs | Ai1 Redeemer Buffer | $99 | All-in-one Jack mount Buffer Installation Kit | For Guitars & Passive Volume Pedals Mod — Gsus4
![楽天市場】One Control Minimal Series Pedal Board Junction Box with BJF Buffer新品 バッファー/ジャンクションボックス[ワンコントロール][Effector,エフェクター] : ギタープラネットOnline 楽天市場】One Control Minimal Series Pedal Board Junction Box with BJF Buffer新品 バッファー/ジャンクションボックス[ワンコントロール][Effector,エフェクター] : ギタープラネットOnline](https://tshop.r10s.jp/guitarplanet-online/cabinet/effector-5/pbjb-3.jpg)
楽天市場】One Control Minimal Series Pedal Board Junction Box with BJF Buffer新品 バッファー/ジャンクションボックス[ワンコントロール][Effector,エフェクター] : ギタープラネットOnline
![Amazon.com: IK Multimedia Z-Tone Buffer Boost Guitar preamp Pedal with Boost, Active/Passive Pickup selector, switchable Pure/JFET Channels, True Bypass and DI Out for reamping/Live use : Musical Instruments Amazon.com: IK Multimedia Z-Tone Buffer Boost Guitar preamp Pedal with Boost, Active/Passive Pickup selector, switchable Pure/JFET Channels, True Bypass and DI Out for reamping/Live use : Musical Instruments](https://m.media-amazon.com/images/I/61tB+dFfcjL._AC_UF350,350_QL80_.jpg)