Dan,

Does it still squeal at the end if you stop ten minutes before the end 
and clean and then restart with overlap?

See my technique for loading C-0s that doesn't involve opening them:

http://richardhess.com/notes/2006/03/06/loading-c-0-cassettes/

Also, see my posts about lubrication and my favourite lubricant:

http://richardhess.com/notes/?s=Decamethylcyclopentasiloxane

Cheers,

Richard




On 2018-06-06 5:13 PM, Dan Gediman wrote:
> Folks,
> 
> I received today my first shipment of archival tapes that I need to digitize for a public radio documentary I’m working on. These tapes are ultra-cheap Certron-brand tapes of the sort you would get at a dollar store. I have scrupulously cleaned the heads and all other parts of the tape path between every tape playback (even when I flip the tape over to record the second side). Some, but not a lot, of oxide is coming off. When I clean the pinch roller (using 91% isopropyl), there is a little bit of brown on the Q tip after one side of the tape has passed.
> 
> The problem is that, as each tape is coming to an end, during the last 5 minutes or so (these are mostly C-60s), a high-pitched squeal starts to be heard. What might be causing this and what, if anything, can I do to mitigate the problem. In the previous set of posts on the subject, the consensus seemed to be that baking is rarely (but not never) needed with cassettes.
> 
> Any thoughts or suggestions?
> 
> Thanks so much!
> 
> Best,
> Dan
> 
> Dan Gediman
> 502 299-2565
> [log in to unmask]
> www.dangediman.com <http://www.dangediman.com/>
> 
-- 
Richard L. Hess                   email: [log in to unmask]
Aurora, Ontario, Canada                             647 479 2800
http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.