About to start repairing a second 5065A. Gathering parts. 1. Looking for a replacement for the still available but very expenceive OPA111 used in later versions A9 Integrator of the HP5065A. There are indeed some candidates at Digi-Key, but when the selection of max Input current, offset voltage and supply voltage is set, there are not that many left. So - which parameters are the most crucial for the integrator? 2. Looking for data on the Ferrite bead HP 9170-0029. Any suggestion on a suitable equivalent? 3. Looking for the teflon single pin feed-thru connectors used on almost all modules on the 5065. Best Regards Ulf Kylenfall - SM6GXV