Hi, back from my trip down south and have just read the responses to your issue. Can you borrow, beg or steal an oscilloscope? If so you can quickly check the waveform from the oscillator on the erase head, it should be approx 60Khz at a AC voltage of approx 80V. The oscillator transformer is a very robust device and will most likely be alright. Have you checked the 1uf capacitor on the 470 ohm feed resistor? Also have you measured (from either pin 3 or 8 of the 12AT7) to ground, this should measure 470 ohm. Replace the capacitor that goes across the anodes with a .001 uf 630v capacitor, make sure this is a high voltage capacitor as there is a large AC component across the anode windings. My advice is to replace one component at a time then check for a result, as often when a blanket component change is made chances for a wrong connection are multiplied. Good luck.