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PaulM · 13th Mar 2019, 10:52 am

The video 'noise' was just the normal FM hash. As first presented, the audio was what appeared to be control track buzz.

We then tried the tape 'the other way up', as the wear on the tape was inconclusive. With it the 'other way up' there was no audio and the suspect looking control track appeared on the waveform monitor, as would be expected. We also tried it 'inside out', but there was nothing then, either.

For anyone interested, the Quad tape track format is here:

http://www.quadvideotapegroup.com/im...0TRT1-03-C.jpg

I think that the RF copy is academic - there seems to be nothing on the tape and it's just speculation as to how this came to be as it is. Even if it was helical (which the wear pattern doesn't support), I would expect to have seen some random(ish) shash going through the FM demod output. There was nothing.

Best regards,

Paul M

13th Mar 2019, 10:52 am	#37
PaulM Hexode Join Date: Nov 2006 Location: Near Lincoln, UK. Posts: 483	Re: Quadruplex 2 inch tape The video 'noise' was just the normal FM hash. As first presented, the audio was what appeared to be control track buzz. We then tried the tape 'the other way up', as the wear on the tape was inconclusive. With it the 'other way up' there was no audio and the suspect looking control track appeared on the waveform monitor, as would be expected. We also tried it 'inside out', but there was nothing then, either. For anyone interested, the Quad tape track format is here: http://www.quadvideotapegroup.com/im...0TRT1-03-C.jpg I think that the RF copy is academic - there seems to be nothing on the tape and it's just speculation as to how this came to be as it is. Even if it was helical (which the wear pattern doesn't support), I would expect to have seen some random(ish) shash going through the FM demod output. There was nothing. Best regards, Paul M