by barryg » 15 Aug 2011, 17:31
The tape I use is BASF SM468 Professional on various tape echo machines and don't have any problems with it. If you're not getting the echoes as you should try adjusting the controls and settings or get the machine checked out for faults. If you get some echoes and not others I would doubt it was the tape that's at fault and I would suspect the machine is not producing those missing echoes. Do the easy checks first and play with the settings and see how the echoes change if that doesn't change anything then start looking at the mechanicals and capacitors, valves and resistors etc.
Let us know what you find, it's always interesting know.
Barry