In a message dated 1/1/01 10:33:23 PM, njpguy at icqmail.com writes: << RETICON R5101 8667 Could anyone tell me what this is? >> That IC is an analog delay chip, similar to the SAD-1024 and MN-30xx chips. MXR used them in a few of their delay-based products (such as the Flanger and the green Analog Delay). Michael Bacich