I put my 1000A back in rotation last week. While checking it, I had no sources connected to the back and cranked the volume to 11 listening for hum, crackling, motorboating, hiss, etc in all functions except FM/AM. It was quiet in MIC, and AUX/Tape Mon. However in Phono or TAPE HEAD, it now has an inordinate amount of HISS in the Right channel and a rythmic thrumming sound at about 2 times a second in the left Channel. When I restored the unit back in 2009, I recapped the phono board and replaced a few resistors on each side that had gone out of spec. The transistors on the board are 2sb381's which are germanium. The only cross ref I can find is to an SK3004 or a NTE-102A. And honestly, I wouldn't buy any of these off E-PREY if they were the last transistors on earth. Is there a Silicon pnp that would probably work? I haven't been able to find anything even remotely resembling a 2sb381 datasheet in the last week.