Swampwalker & Acman3......
Yes, I could try some other interconnects, but this morning, after more aggravation, I decided to take the Hagerman totally out of the the system. I reconfigured my Acoustech phono preamp for MC input (61.5db of gain, 220 pF capacitance, & I like the sound at 47k Ohms resistance). Boom, dead quiet! The headamp was an experiment, and there were several things that I thought it did improve on (bass tightness & impact, stage was slightly improved, and perhaps a bit more extension at the top). However, nothing earth shattering, and certainly not worth the extra noise. Listening now, going straight in to the phono preamp, sans headamp, it sounds incredibly good, and QUIET! Thanks for all your suggestions! I think I'm going to stick with this.