| DeForestation Treeverb Oh no, here the "savant" goes again with his "un-educated" guitar pedal hubbaloo |
So sometime in about 2018, or 2019, I bought a Belton Brick BTDR-3 Reverb Brick, and went to town trying to design my dream Reverb pedal. For those that don't know, the Belton Brick is a series of PT2399 echo modules (commonly used in Karaoke machines and other cheap vocal-esque devices). This was after some failed attempts with a Bucket Brigade chip from NTR and several PT2399 chips on their lonesome (which are very cantankerous chips to say the least). What belton has done is packaged their reverb "bricks" into a simple module, that allows the guitarist or budding pedal designer to make their own reverb, or retrofit a springless reverb design easily into their amplifier possibly.
Initial Designs I had an early design based on the failed understanding of how Reverb Effects work. See, I thought you ran the guitar THROUGH the brick, and then the brick acted as sort of a mix device - not something different. So I kicked the signal up using a pair of LM386 op-amps as buffers, and wound up with some crazy gothic reverb noise device that was not really good as a usable reverb, but as a noise making device using the reverb brick as a full-on effect. The Current Design The current design utilizes the BTDR-3H Accutronics Reverb Module - not as a Stereo, but to create 2 separate reverb effects at once with 2 different dwell characteristics, one longer than the other, and the dwell selectable via the two toggle switches on the pedal and analog adjustable via the two 100K Trim Pots. I figured out I could get it in the right ballpark using some 1M resistors on the dwell leads, including 2 in series on one pair, so that I could create those relaly long, big, Plate-style reverb trails I like to use. Everything feeds into a 50K Mix Pot for output that balances the mix between the wet and dry signal. |
