@sdecker
FWIW, the CS2.4SE did away with the 1 uF bypasses on the coax feeds, ie, full 14 and 28 uF in single caps rather than 13+1 and 27+1. I am aware of a third-hand report that a 1 uF bypass can have a deleterious effect on SQ (supposedly better to go either higher or lower values for bypass caps). I don't have any information on whether this is related to Jim Thiel's decision to do away with the bypasses. But, clearly, he preferred the sound of 14 and 28 uF Clarity SAs over the original 13+1 and 27+1. CSS apparently has 14 and 28 uF SAs available although the ESA are supposed to be a step up from SA.
My modded boards have 14 and 28 uF values in single Clarity CSAs, the 14 uF bypassed with a 0.1 uF Multicap RTX and the 28 uF bypassed with a 0.22 Multicap RTX. The bypasses improved the "jump factor" and added, maybe, a smidge of resolution.
Buying these parts from a retailer, I would probably get 10+3.9 uF (and a 0.1 bypass) and 18+10 in 630 volt Clarity. Maybe CSA for the bigger value and CMR for the smaller value (for maximum SQ) or all CSA (to save money and space). Jantzen Alumen is said to mix well with Clarity, also.
Regardless, I highly recommend replacing the 2.4 resistors with Mills MRA-12s. You can replace the sandcasts on all boards for about $100. Money well spent. Sonic Craft carries all the correct 2.4 values although you have to mix and match from among the older Mills and newer Vishay-Mills.
Anyhow, thanks for posting about your ESA upgrade a few years back. That gave me courage to try my own mods - and I'm super happy with how it turned out.
FWIW, the CS2.4SE did away with the 1 uF bypasses on the coax feeds, ie, full 14 and 28 uF in single caps rather than 13+1 and 27+1. I am aware of a third-hand report that a 1 uF bypass can have a deleterious effect on SQ (supposedly better to go either higher or lower values for bypass caps). I don't have any information on whether this is related to Jim Thiel's decision to do away with the bypasses. But, clearly, he preferred the sound of 14 and 28 uF Clarity SAs over the original 13+1 and 27+1. CSS apparently has 14 and 28 uF SAs available although the ESA are supposed to be a step up from SA.
My modded boards have 14 and 28 uF values in single Clarity CSAs, the 14 uF bypassed with a 0.1 uF Multicap RTX and the 28 uF bypassed with a 0.22 Multicap RTX. The bypasses improved the "jump factor" and added, maybe, a smidge of resolution.
Buying these parts from a retailer, I would probably get 10+3.9 uF (and a 0.1 bypass) and 18+10 in 630 volt Clarity. Maybe CSA for the bigger value and CMR for the smaller value (for maximum SQ) or all CSA (to save money and space). Jantzen Alumen is said to mix well with Clarity, also.
Regardless, I highly recommend replacing the 2.4 resistors with Mills MRA-12s. You can replace the sandcasts on all boards for about $100. Money well spent. Sonic Craft carries all the correct 2.4 values although you have to mix and match from among the older Mills and newer Vishay-Mills.
Anyhow, thanks for posting about your ESA upgrade a few years back. That gave me courage to try my own mods - and I'm super happy with how it turned out.