I have a 1969 Ampeg V4-B 100watt bass amp/head. I am the second owner, I got it form its original owner about 2.5 years ago. I also have an SWR Workingmans 12 for a practice amp and am falling in love with the SWR sound. Anyway, I think my trusty AMpeg may be due for a re tube and I want to give it a fair chance before I sell to get an SWR Bass 500, or MOBass head/amp. Does anyone know what type and quantity the tubes are in this amp? WHere can I go for info? Where can I buy tubes for this amp? Any info is greatly appreciated!