FORUMS: list search recent posts

You old guys: Got any tricks for cleaning clogged one-inch video heads?

COW Forums : Broadcasting

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Mark Suszko
You old guys: Got any tricks for cleaning clogged one-inch video heads?
on Oct 12, 2010 at 6:59:25 pm

Some very stubborn clogs on our air-threading Sony 1-inch machine. We've been running a lot of 20-year-old tape thru it as part of a transfer to new archival. And have many hours more to go. Clog is exceptinally stubborn. Take off and nuke it from orbit? Or is there a softer option? Doing it the old-fashioned way with chemwipes and isoprop right now.


Return to posts index

Bruce N. Goren
Re: You old guys: Got any tricks for cleaning clogged one-inch video heads?
on Oct 16, 2010 at 6:58:04 am

Avoid using cotton on video heads, no such thing really as cotton lint-less.

We used to have lint-less linen squares to keep Quads clean, I think the Textwipe folks supplied it. First line of defense was alcohol, and as mentioned here already, freon was the second line of defense. But freon could crack the heads if used too liberally. We kept a squeeze bottle of each on top of each machine. I remember some cowboys would drip a few drops from a bottle of freon right on the headwheel to wash away a persistent on-air clog! I would wrap my thumb with a layer of linen cloth square, drench my wrapped thumb with freon, and apply directly to the spinning head, can still hear that ziiizzzzzzzzz, managed never to slice my finger or break a head! Some guys used their bare thumbs, ouch!

Third and most potent cleaner was xylene, a powerful and dangerous solvent, smelled like magic markers, I seem to recall if you got the tiniest amount on your hands you could feel it penetrate deeply and almost "taste" it a few seconds later. Use gloves, don't breathe the fumes!

One inch head gaps are smaller and the assembly more fragile than quad so never try the crazy powered up spinning tricks we did in the old days with Quad.

Bruce N. Goren
"If you don't have time to do it right, when will you have time to do it over?"
John Wooden, Basketball Coach


Return to posts index

Larry Odham
Re: You old guys: Got any tricks for cleaning clogged one-inch video heads?
on Mar 7, 2012 at 3:18:54 pm

Hello Mark,
came across your post, it's been a while, dont know if you are still needing some help with your head clogs.
The problem you are having is not as much the head clog, but the tape itself. The head clog is the symptom of a more serious problem.Tape hydrolysis - moisture has been absorbed by the binder and/or lubricant layers in the tape, causing a sticky-shedding syndrome of a black goo substance.
When a tape gets to this point, two approaches will work,1. tape burnishing on a tape cleaning machine with lint-free pellon cloth. or2. to bake the tape for several hours at 122 deg.F in a oven specially built for tape baking.
Baking works 99% of the time if the oxide layer isn't damaged. I dont do much 1 inch, most of what I do here is 2 inch quad. For example to bake-dry a one hour 2 inch tape, the oven is brought up to 122 slowly over a two hour period, and baked at a constant 122 deg f +- .5 deg. for 18 hours, then cooled slowly back down to room temp for another 18 hours.
Afterwards, the tape will usually play back with no head clogs for a short period of time from a day to a week or so before picking up moisture again.
OK hope this helps a little,I could probably bake a few tapes for you if needed,
larry@quadtapexfer.com


Return to posts index


Mark Suszko
Re: You old guys: Got any tricks for cleaning clogged one-inch video heads?
on Mar 7, 2012 at 6:55:24 pm

Thanks, Larry, I knew about this but wasn't in a position to bake 200 reels. We finally got them all transferred off and there's a huge gaping hole in the rack where the 1-inch used to be now. It's gone to the big repair bench in the sky, to be with Philo.


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2019 CreativeCOW.net All Rights Reserved
[TOP]