Thanks for all of the responses. Background: USMC Radar repairman from the 1980's. Worked in Medical imaging field engineering starting 1990 until recently retired. Now I am "playing" with vintage audio gear. I have several Pioneer SX series receivers, a few Pioneer wood turntables, some Marantz, Sansui, and Kenwood gear. Some of my stuff is working great, others are works in progress. Note, it's been over 30 years since I worked component level. This challenge makes it fun. TJT