| go home |
note: there is a MC and a MM gain stage to the left and a dual mono RIAA to the right. There is not a seperate RIAA for the MC or MM.
In trying to replace the Panasonics /w ELAN Cerafines I tore up the board.
Back went a new set of Panasonics and no named resistors.
And some new trace made of discarded leadsand top of board soldering.
| [RIAA] U3, U4, C35, C75 |
LM4562 opamp Blackgate NX Hi-Q .1uF/50v on pin 4 & 8 Replaced ceramic caps /w same value silver mica |
| [RIAA opamp power] R11, R25, R50, R75 |
Vintage Vishay's vintage ~1970 100ohm 1/2 watt resistors |
| [RIAA opamp power] C88, C89, C90, C91 |
Panasonic/Matsushita 470uF/25v |
| SS filter caps | removed |
| SS switch | hardwired off |
| [MM gain] U6 |
OPA2228 opamp Blackgate NX Hi-Q .1uF/50v on pin 4 & 8 |
| C69, C82, C72, C73 C68, C62, C76, C77 |
Blackgate NX Hi-Q .1uF/50v |
| R17, R18 | Riken 47k 1/2 watt input resistors |
RCA short plugs with 4.7k resistors
Resource
8.29.2008