[QuadList] Visible effects of magnetized tape path elements (was AVR3 Video Head Degausing)

[C. Park Seward]

Ted,

Next time I see this I'll take a shot.

Best,
Park

C. Park Seward
Cell: 818-535-2747
Home: 541-476-6657
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On Jul 25, 2012, at 1:02 PM, Ted Langdell wrote:

> Celebrating four years of Quad Conversations, July 25, 2012
> 
> _______________________________________________
> This is a very useful thread for folks who may not have seen this type of damage.
> 
> Does anyone have screen captures that illustrate what Wayne and Chris are writing about?
> 
> Please post to the list if you can.  
> 
> Under 1MB photo + text will go directly to the list.  Larger files will make a stop for review. (That's to keep HUGE files from causing problems with recipients' in-boxes)
> 
> Thanks,
> 
> Ted
> 
> Ted Langdell
> Secretary
> 
> On Jul 25, 2012, at 11:25 AM, Wayne Watson wrote:
> 
>> I agree Chris and that is exactly what it looks like. The dots would would become worse (intensify) over many passes. To isolate the magnetized area I would put  a layer or two of scotch tape on, say a post, and then do 10 or 20 passes and look at the dots again. Of course clean the path well after this.
>> 
>> Wayne Watson
>> 
>> Sent from my iPad
>> 
>> 
>> On 2012-07-25, at 11:55 AM, "chill315 at aol.com" <chill315 at aol.com> wrote:
>> 
>>> IMHO the rotary head is not the problem.  The biggest thing that I found needing degaussing was the rest of the tape path.  The magnetized areas would show up as fine dots on a diagonal line.  This was caused by erasing a part of the tape.  But it would only be a fine amount and appear to be a scratch.
>>> 
>>> Degaussing the path and it would disappear.  The problem was that the demagnetization had taken place and the tape is now degraded.
>>> 
>>> We did the tape path about every 25 hours of head use.
>>> 
>>> Chris Hill
> 
> Ted
> 
> Ted Langdell
> Secretary
> 
> 
> _______________________________________________
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> 
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