Anyone tried those cheap chinese vactrols as replacements for VTL5C3s?
https://www.ebay.com/itm/5-Pcs-VTL5C-Series-VTL5C1-5C2-VTL5C3-DIP-4-Audio-Amplifier-Linear-Opto-Coupler/143190434962?hash=item2156d0a492&enc=AQADAAAC8FjVrDbVsZ8oH%2F8PNHtt9VX4%2Fw7FZcmMuqsX8uaFEduVItO1Qd6DNY2apyKYh8s8F%2FdloGGcSnBvoFYoLHxqUYh29mNR7YGps36qW72gkO11c%2F0Nx3btpxu1N07Ti9f3%2FTbGjtlenRmugO1OXO2IfdRo%2FB9Z5sVzcKVusfzGGAKCvteoLRxe4CWFycBbkhJ69OTGO00QDKCp3HSpFZ9OYnjKgvD6Za3ekp8PqTvQKGySixFh%2FL9IDCGibHLVUVE%2FJlgcFLIVT3pjzIlzPXfMTH0q7UNe8Jnh%2Fi6qqY%2FQNhDrJNzq2srEDOisGyPNGE081YUEY%2FaXbRGQdq9JRatwjrS5%2Fi7v80idfXmFdwrE190R8OcZC3K7jJI%2Fx%2B9KuRIf2QgPGA3vd0qZovLJ9MI7kNcKf4HTGo50T0D2t8rwUalp4rQkjOEmK5FqcgpPpDJX2PFa5PZ7bxCDs4KXJNjUgg1CZ%2BFGeTI3PZ8H91qxanLpAcROHFNEFEVZ1UAb2ET63kURiD64ivBQ8DwIIDQJPzIlfV2p7Irm1nlRiXfyUyOR1MDOXhfo%2FWsTENaTMtTYszvNhwNC5Jk09gxv8bouGuO2ZJC3Gsdl8WAY9atUgP2TAyz3f%2B3q5%2FIITOLfoB4S6jrun%2FDSX835RumLyG%2BHBw%2FCoti9ra6aSN0ZoNfs194zFu%2FN1xynol1qhC2M7eT7dLff6MI2PBxvAh%2BgyEwPkIrYRGPvLWSmwiM3Ib4pY3q67TfBFksL1wyJZH1cwFKSU80O5bE9zO60Fd9p6g0WQNU3k%2Br949tNNu1Lt5hbXCJqzqJqKG9HoosUksQEgcXv5mSdxXMRF5c3lSohQeKzBr9Q4lij472AkS0M5LZOslGPLpqKBRh84vxu9Z%2FBts%2FQmHDrYZnxxSVqt5OBMvy5KWIg0IX0rmvg6rcaKuvL2Kh%2FeS%2BO%2BwUpEHvDvPOuWPJi9AIDrCkI6vzIagiIqQyu2YJzKISzL0BO75k29uS6PkSG&checksum=1431904349620cf8a1ab24af452fb971ffa024d980cb&frcectupt=true