Lapping Troublesome Ferrite Erase Heads

[@zambrano966]

Muy interesante tu trabajo ASB Custom, me entero que los cabezales de borrado influían tanto en la grabación. solo creia que era un campo magnético para borrar la informacion en la cinta, impresionante el trabajo que haces.

[@asbcustom]

Thank you Nelson!

[@MrSteney]

Pretty fascinating stuff. I would have never guessed how porous those heads actually are. I keep reminding myself that i do not need a microscope. :)

[@asbcustom]

Ah go ahead, get yourself one :)

[@killmore75]

Full respect on what you are doing! Cheers!

[@asbcustom]

Thank you so much!

[@goldenmusic0716]

Yasoo Peter!🤝 I also think that on the through channel, after subsequent runs, there is a decline in high frequencies! Therefore, you can introduce a correction during tape calibration and initially raise high frequencies by about +2, +3 db and after several tape runs, the residual magnetization will come closer to 0 db! Of course, in analog recording, it is very difficult to achieve residual magnetization on the Fe tape, on the Chrome tape - it is easier to do! It is for this reason that factory measuring tapes write on Chrome!

[@asbcustom]

Yasou Vadim! Most of the type 1 calibrations I see ask for a small rise in the toe of the curve, yes, but tend to be more level on types 2 and 4. This one asks for about +1db on type 2. Some machines can handle it better than others, I would rate this one closer to the middle, not quite in the "finicky" category but approaching it.

[@goldenmusic0716]

@@asbcustom I wrote you an email, read it! I shared an interesting idea with you!👌

[@asbcustom]

Okay, I have it. I'll watch it tonight. Thanks!

[@Oklawolf]

I have a store 30 minutes away that has stacks of those UR90s for sale for about $4 CAD each. It's nice to see, but I don't know who in that particular town is still buying them. I'm waiting for them to go on clearance and then I'll stock up.

[@asbcustom]

I can't recall what he said he paid for these but I know it was much more reasonable than that. I'm just happy someone still has them. My thrift stores used to sell them for pennies, then all of a sudden stopped. So sad ...

[@MrSteney]

These are $9.99 for a five pack, US. Plus tax of course. Roughly $2.12 per cassette. I'm not waiting for a clearance. If we don't buy them, they'll quit selling them. Our hobby is a pretty small group of people, so sales of cassettes most likely aren't a high priority for any retailer.

[@rcary]

So, the graphene fills in the micro pitting? And in essence creates a bigger playing field for the tape to make contact with? Will the tape running over the head start to remove the graphene a little bit over time? It would be interesting to see a microscope view of the cassette tape surface as you did with the head you showed. Very cool vid though. Thanks. 😀

[@asbcustom]

"Fill" isn't the right word if I used it. I'm theorizing, rather, that it may partially short the larger pits, preventing the creation of eddy currents. At very minimum, it's a very hard and slick surface coat that should help prevent wear.