Thiel Owners
holco - good judgements, upgrading the signal paths. Coupla comments. Depending on your serial number and if it is Lexington-made and whether or not it is on masonite or a PCB, the .72mH woofer coil may not be the correct value. Details would help evaluate those particulars. Likewise, if it is Lex-made, the coil will look very tight and well-wound. If so, that is an ERSE coil which, in my opinion, will not be improved by the Jantzen, unless the J is foil. On the coax board, you are ignoring the parallel feed in the first position. I suggest investigating the 43uF cap and its 16ohm series resistor. At minimum replace that 16ohm with MRA-12s. Beetlemania might have comments on the other resistors. |
@holco Regarding coils, as Tom noted, you need to verify whether your boards are point-to-point on masonite (made in Lexington) or PCB (made in China by FST). The coils values are slightly different for the latter to account for subtle changes in that environment. The layout you have is for the PTP and the PCB values are somewhat different. I recommend upgrading all resistors to Mills MRA including that 16 ohm. Not sure why you have the one in parallel. Is it becuase you can’t find the correct value? Sonic Craft has all the correct 2.4 values. But note that the “Mills” are older and “Vishay Mills” are newer after Vishay bought out Mills. You’ll have to mix and match the old and new but that is of no issue. That 43 uF cap is a subfeed and deserves attention. That is a tough value to get in a quality cap. You can get that value in ERSE Pulse (Tom had this option on his short list), or run a parallel (eg 10 + 33) higher quality. Tom has a custom Clarity CSA for that cap, not sure whether/when that might become availability. Note that you can go with a lower voltage for that one as it is downstream of that 16 ohm resistor. You might also replace those big 100 uF electrolytics with ERSE Pulse. Tom is getting a custom low voltage Clarity to replace those but, again, unsure of its availability. ERSE could also be a decent option for the woofer caps (33 and 56 uF). |
Thanks Tom & Beetlemania :-) For sure it's the PCB version, resistors are equal but there are no marks on the coil's, do you guy's know the value of the changed 0,72mH coil on the PCB version? I wil also look for the other parts that you reported. Can't find a Mills 4ohm resistor in Europe that's why I changed them to a parallel 4R7 and 27R resistor with a total result of 4R003 See photo, https://www1.picturepush.com/photo/a/16063392/1024/Thiel-CS-2.4/20181101-192450.jpg |
