If I discount speakers and tubes, it was probably $80 of parts and 2 hours of time which has been time and money very well spent – Changed tubes to JJ power + rectifier, Sovtek preamp (Sovteks were surprisingly good, although I have some Tung Sols to try, and a Weber Copper cap for if the rectifier goes) – Changed crappy Wharfedales out to Alnico's, settling on the classic 2x Celestion Blues (great combinations included 2x Greenbacks, Silver + G12H30, Silver + Creamback, Silver + Blue, Gold + Blue, 2x Gold - favourites were blue + gold, 2x golds, 2x blues) – Swapped out all the caps in the signal to Mallory caps (C11,C14, C15, C17, C18, C19, C20, C23 to Mallory equivalents) – Changed the screws out for ones that don't strip instantly – Changed the Plate resistors for more gain, and more vintage spec (replaced R6 & R7 100k Plate Resistors with 220K Resistors) – Removed Top Boost Cathode Bypass cap for tighter bass, more headroom on the TB channel (removed c9) – Changed the treble cap in the top boost channel, and the one on the TB vol pot (c13 to 68pf, c16 to 47pf) – Added more gain to the normal channel, changed the brilliance switch caps to be useable (removed and jumpered R49, C12 to a 100pf cap, and then put a 68pf cap across lugs 1 and 2 of the Normal volume pot) – Sped up the Tremolo (changed R38 to 27K, R37 to 100k) – Swapped out reverb tank for an Accutronics one (replaced R18 with a 28K, added a 470K resistor across lugs 1 and 3 of the reverb drive switch, replaced pan with Accutronics pan # 9EB2C1B) – Made a junction box for the speaker wire/reverb cable to connect to and attached it to the chassis - essential to save headaches and swearing when changing tubes or speakers.Here's the list of things I have inflicted upon this poor thing so far This post is really just for posterity for myself rather than anything else. As you know I have an AC30, and I've been modding it over time to see how good it can get.
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