04-11-2014, 02:39 PM
I forgot to add that my Dad added a switch and a bundle of wires to the ST-70 that so he could switch between two sets of speakers and headphones. All that is undocumented. I thought of ripping it out and restoring all the wiring to original, but it didn't seam to be hurting anything so I left it in. I doubt that the new wiring is my problem, but it certainly adds complication to the troubleshooting.
John Honeycutt