Hey Mr. Jerman, welcome!
Waldo's TPC-1 is essentially a unity gain buffer, except that it is not quite unity gain, it's actually -1.7 dB. "Unity Gain Buffer" being the generic name.
Here's an old thread that tries to clarify the "non-unity gain" of the TPC-1. Though several posts talk about it having higher gain than "unity" when it actually has lower gain than unity.
This post in particular:
At least that's my understanding.
TPC-1 on Reverb pretty clearly states -1.7 dB gain:
https://reverb.com/item/23796313-wald-e ... ffer-1-7db