Hey Folks, As some of you know I'm modding Paul Pigat's Fender Excelsior. The objective is to give it some tighter bass and clearer, more balanced highs. For those interested in the process and the nitty gritty details, the mod-thread is located here (gdp link). It's a bit of a read. The summary of the current list of mods is in post 286. I'll list them again below. Here are the before and after recordings. Stock circuit, with Tung Sol reissue 6v6gt power tubes and EHX 12ay7 in V1: https://docs.google.com/open?id=0B82lBHbq5VHKNnpSRjl1bFJldGM Modified circuit, with Tung Sol reissue 6v6gt power tubes and EHX 12ay7 in V1: https://docs.google.com/open?id=0B82lBHbq5VHKdTZ4RTJudjNjVjg I used the Viking in these recordings (supertrons). The effect / differences are more pronounced when I use filtertrons. So, I guess I'll have to do those recordings again with the Gent. So, the list of mods so far: Tone Control mods Replace tone switch with 500k Audio pot - more control over tone - independent mod Change R9 and R29 to 10k (or add parallel 22k to get 11k effectively) - increases tone pot control range - only mod after adding tone pot. Change C2 to 720pF (add parallel 360pF) - changes tone control contour - independent mod Dynamics & Clarity mods Swap stock 6v6s with Tung Sol Reissue 6V6gt - improves clarity - independent mod Swap V1 12aX7 for 12aY7 - reduces gain and extends clean range on the volume dial - independent mod Add extra 47uF/450V elco parallel to C28 - tightens bass response - independent mod Change cathode bypass cap C32 from 100uF to 22uF (63V min) - improves responsiveness, more clarity and punch - independent mod. Bridge together rectifier-side of resistors R22 and R30 - *Reduces sag, tightens up bass response, evens the overal response of the amp (less nasal & honky) - also needs mods 6 & 7 to compensate for higher voltages. Add 2k2/2W in series with R58 - Reduces voltage to preamp - only needed after doing 5. Insert 2 x 12V/5W zener from B+ connector to OT center tap - Reduces B+ voltage back to stock - only needed after doing 5.