Hi all, I recently acquired a SA-9800. It is an "S" version from Europe. It looks in very good nick and the circuitry does not appear to have been touched. Now I am planning to rebuild the power supply and recap it.
My electronics knowledge is basic, but I am good with soldering iron and have successfully recapped a SA-8800
Things I am planning to do are as follows:
1) Use the rebuild list created by solution room and overseen by markthefixer - http://www.audiokarma.org/forums/index.php?threads/sa-9800-re-work-begins.409557/page-3
I will also replace the parts in the rectifier board as well
2) I may upgrade some of the amp board transistors as found in Lee's link, this list was approved by Echo - http://audiokarma.org/forums/index.php?threads/pioneer-sa-9800-restoration-and-upgrade.420407/page-2
3) I want to upgrade the AWR-194 power supply board to a AWR-196 (as the GH version) - http://audiokarma.org/forums/index.php?threads/sa-9800-in-need-of-some-tlc.609273/page-2
Questions I want to ask for the moment are as follows:
1) I will replace the filter caps with 661-EKMH800T183MB80T - these are 180000uf / 80V - I have read that a limiter resistor upgrade will be a good idea with this - I want to know what are the limiter resistors in this power supply and what it should be upgraded to?
2) What is the function of the 2 chassis mount wire wound resistors in front of the transformers? - they are called R1 and R2 in the schematics and they are R1- 150 Ohms (5W), R2 - 220 Ohms (5W)
My electronics knowledge is basic, but I am good with soldering iron and have successfully recapped a SA-8800
Things I am planning to do are as follows:
1) Use the rebuild list created by solution room and overseen by markthefixer - http://www.audiokarma.org/forums/index.php?threads/sa-9800-re-work-begins.409557/page-3
I will also replace the parts in the rectifier board as well
2) I may upgrade some of the amp board transistors as found in Lee's link, this list was approved by Echo - http://audiokarma.org/forums/index.php?threads/pioneer-sa-9800-restoration-and-upgrade.420407/page-2
3) I want to upgrade the AWR-194 power supply board to a AWR-196 (as the GH version) - http://audiokarma.org/forums/index.php?threads/sa-9800-in-need-of-some-tlc.609273/page-2
Questions I want to ask for the moment are as follows:
1) I will replace the filter caps with 661-EKMH800T183MB80T - these are 180000uf / 80V - I have read that a limiter resistor upgrade will be a good idea with this - I want to know what are the limiter resistors in this power supply and what it should be upgraded to?
2) What is the function of the 2 chassis mount wire wound resistors in front of the transformers? - they are called R1 and R2 in the schematics and they are R1- 150 Ohms (5W), R2 - 220 Ohms (5W)