Modding a MF X-LPS...
I picked up a MF X-LPS phono stage and intend to mod it.
I'll do the usual diode upgrade, increase the capacitance on the PSU section, link out the O/P DC blocking caps (but will probably have to keep the I/P DC blockers) and probably refresh the remaining electro-caps. I will also use a more capable linear PSU.
Unfortunately I have not found a circuit diagram for it.
The only point I'm stuck on is the op-amps. They are marked SSM f 69PH. I've found a few other folk asking about these but no answers and hence don't know if the pin out is standard. Is it something anyone has come across before? I'm just wondering if it was OK to drop in a more modernreplacement e.g. AD797 .