For those who asked, this tape was recorded in a private house in the Cambridgeshire (UK) sometime during the mid 50s / 60s. I don't have any evidence that would suggest there may have been a TV in the recording space (might be a possibility though).

Richard, thanks for the ideas. I'll look into your suggestions when I'm back in the studio tomorrow and report any findings.

Cheers

Gregorio Garcia Karman
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On 06.02.2012, at 22:41, Richard L. Hess wrote:

> Gregorio,
> 
> If you can notch it, it is not an artifact of stick-slip. It is on the tape that way or your machine is very very broken <smile>. If it follows the tape to another machine, it's on the tape.
> 
> If this is an original recording and it's really 11,100 it would not be 405 line as that looks to be about 10,125. However, that's only 9.6% fast. Is that a possibility (405 line recorded 10% slow and now you're playing it so it comes out 11,100)????
> 
> Resample it down 9% or so (changing both time and pitch -- we have to specify that these days -- or just play back using the varispeed). What does the content sound like?
> 
> There are all sorts of reasons that it could have been recorded slow. 10% is a lot to be off, but not that much.
> 
> What part of the world are you in and where did the tape come from? That would be a bit of a help chasing down this.
> 
> Cheers,
> 
> Richard
> 
> On 2012-02-06 5:22 PM, Gregorio Garcia Karman wrote:
>> I know I can notch it quite effectively but I was interested to know if this might be a symptom that something could be wrong with the tape and I should be trying to fix it before transferring.
> 
> -- 
> Richard L. Hess                   email: [log in to unmask]
> Aurora, Ontario, Canada           (905) 713 6733     1-877-TAPE-FIX
> http://www.richardhess.com/tape/contact.htm
> Quality tape transfers -- even from hard-to-play tapes.