Tom, here is what I found inside my SB-610: 10 uf (p/n 25-54) Darn, couldn't read this one. A small cap, about 0.5" long 40 uf (p/n 25-41} 350V 30-20-20-20 uf can (p/n 25-63) 450V-400V-350V-300V I built mine in 1972 and use it all the time; it still looks good inside. Had to replace the 0.1 uF 1200V caps once. 73, Mike N3MA