Re: How do you de magnetize Echoplex EP 3 tape head.
I thought its part of regular maint,its working fine though.
Demagging IS a part of regular maintenance but it IMO it falls into the variety of once every 6 months~year or 16 tape changes... whichever comes first. Cleaning heads is an every day thing for big 2" recorders... even many times a day... Not so much on an Echoplex but you still want to clean the heads often...
Q-Tip... 99% alchohol... always move the tip in the same direction, not circular or random... L to R.
Soap & water or windex on any rubber parts in the tape path... make sure to NOT let it drip down the shaft into the gears & motor!!! Bad news...
Check out TapeOp.com for tips & maintenance on analog tape machines & the echoplex. Most of what applies to the care & feeding of a 1/2" or 2" pro-tape machine also applies to the Plex...
When you clean the heads the first couple sweeps will show oxide on the tip... The oxide is bits of worn tape... brown stuff, most times really fine like a powder but sometimes it appears in bigger chunks like a cookie crumb. That's kinda bad... if it occurs often or after a few hours of use, you see those big chunks then something is pretty wrong. Either the tape is old & falling apart, or the tape path & alignment is outta whack and ripping the tape apart. Either is bad!!!
I used to have, maybe even still do have some old bootlegs of Queen & Floyd in the '70s... you could really hear who was & who wasn't changing the tapes and keeping up with the maintence on their Plex... old ones had waaaaaaay less top end in th repeats... extreme treble roll-off. That's cool... just a different sound.