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Post by richardwoods on Mar 7, 2021 11:43:21 GMT
Yes
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Post by josephsenior on Mar 7, 2021 11:53:05 GMT
Tape was expensive, so the episodes were recorded on a single track at slow speed. That way, a large number of episodes (32 in total) could be recorded onto a single reel using all four tracks. Richard, did all the people who direct line recorded tape the same way? Did they all tape using the 4 tracks up? Back then it would make no sense to leave any tracks blank especially considering the cost of making the audio. Considering the fact that the frequencies for the audio and video are completely different there is no way that the video signal would of bleed onto the others tracks. One track would be written to at a time therefore the video signal from one would not bleed onto the next track. |
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Post by Richard Bignell on Mar 7, 2021 13:01:34 GMT
Tape was expensive, so the episodes were recorded on a single track at slow speed. That way, a large number of episodes (32 in total) could be recorded onto a single reel using all four tracks. Richard, did all the people who direct line recorded tape the same way? Did they all tape using the 4 tracks up? As far as I'm aware. |
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Post by richardwoods on Mar 7, 2021 13:35:34 GMT
All television audio broadcasts in the UK during the 1960’s were in Mono. The vast majority of reel to reel tape recorders were either 2 track mono or 4 track mono. Both of these type of machines could only record a single track at a time.
2 track machines were cheaper to make and offered better sound quality as they used wider sections of the tape to record & playback. 4 track recorders had more complex circuitry, more expensive tape heads but critically allowed the user to record 4 sides per tape rather than just 2.
At this time there were also some higher end Stereo tape recorders using either the 4 track system, (one track for right audio channel and one track for left audio channel & turn the tape over and record a second side) or more rarely the 2 track system (one track for left audio channel and one track for right audio channel & no second side).
Theoretically if you had a Stereo reel to reel tape recorder and two televisions both with line out recording capability, you could tape the mono sound on one track and the audio interference from a second television miss tuned to receive part of the video signal as audio, but why would you even consider doing it?
In short you wouldn’t, it would never happen. You would have to set out to do this deliberately, have a stereo reel to reel deck, two televisions that are both capable of line recording and no usable results at the end of it. In other words a major outlay on equipment with absolutely no usable results and critically no reason at all to do it in the first place.
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Post by richardwoods on Mar 7, 2021 13:49:41 GMT
Just as an aside, always having an enquiring mind (& parents who were happy enough to let me risk electrocution😂😂😂😂), I once actually tried to do this and record 405 line video signal on a 2 track Truvox reel to reel back in the 70’s at the high quality audio speed of 15 inches per second. I got absolutely no usable results.
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Post by richardwoods on Mar 7, 2021 13:52:44 GMT
& before someone asks, I taped over the recording years ago as it was a complete waste of time.
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Ace St.John
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Post by Ace St.John on Mar 7, 2021 17:06:07 GMT
Just as an aside, always having an enquiring mind (& parents who were happy enough to let me risk electrocution😂😂😂😂), I once actually tried to do this and record 405 line video signal on a 2 track Truvox reel to reel back in the 70’s at the high quality audio speed of 15 inches per second. I got absolutely no usable results. Just outta curiosity when you say 'no usable results' what actually happened? What results of any did you get and how did you record the 405 line video to audio - was this also by mistuning TV? |
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Post by Señor pinguino on Mar 7, 2021 17:23:32 GMT
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Post by richardwoods on Mar 7, 2021 17:37:03 GMT
Just as an aside, always having an enquiring mind (& parents who were happy enough to let me risk electrocution😂😂😂😂), I once actually tried to do this and record 405 line video signal on a 2 track Truvox reel to reel back in the 70’s at the high quality audio speed of 15 inches per second. I got absolutely no usable results. Just outta curiosity when you say 'no usable results' what actually happened? What results of any did you get and how did you record the 405 line video to audio - was this also by mistuning TV? Yes, I recorded the portion of the video signal that survived in audio & then attempted to feed it via a home made channel 1 modulator circuit back into tuner of the set. From memory all I got was some weird patterning on the screen which in fairness was probably more down to miss matched circuitry than anything recorded. Please also take into account that I was an enthusiastic teenager at the time who never let limited electronic knowledge get in the way of attempting following up ‘good ideas’. |
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RWels
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Post by RWels on Mar 7, 2021 17:55:02 GMT
Just outta curiosity when you say 'no usable results' what actually happened? What results of any did you get and how did you record the 405 line video to audio - was this also by mistuning TV? Yes, I recorded the portion of the video signal that survived in audio & then attempted to feed it via a home made channel 1 modulator circuit back into tuner of the set. From memory all I got was some weird patterning on the screen which in fairness was probably more down to miss matched circuitry than anything recorded. Please also take into account that I was an enthusiastic teenager at the time who never let limited electronic knowledge get in the way of attempting following up ‘good ideas’. Well, it's not totally unlikely. TV signals were recorded before WWII and it was half a century later before anyone was able to play them back... |
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Post by tom rogers on Mar 7, 2021 18:37:08 GMT
I have been following this thread and have to say that I am impressed by the depth of knowledge and enthusiasm demonstrated by everyone. Much of the technical aspects go way over my head but it has been a thoroughly enjoyable discussion to eavesdrop on. This kind of thinking outside of the box (pun intended) is fascinating.
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Post by John Wall on Mar 7, 2021 21:21:14 GMT
Outside of the Police box.......
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Post by richardwoods on Mar 7, 2021 22:00:34 GMT
Well, when we build our time machine & travel back to the 60’s on a missing episode rescue mission, it at least gives us a way of recording something that may have some possibly of being recoverable one day, to a certain limited extent using widely available technology at the time! Remember 2 televisions and a stereo reel to reel with the fastest recording speed possible if you want the sound track too! 😉👍🏻
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Post by peterconvery on Mar 7, 2021 23:48:06 GMT
Or simply just club together and buy the video recorders of the time upgrading along the way....
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Post by richardwoods on Mar 8, 2021 6:57:42 GMT
Or given the vagaries of the reel to reel video recorders of the time, for the best results stop off en route in 1980 and buy an early “piano key” VHS with VHF tuner of which there were many to choose from. As many folks into vintage TV will confirm these give excellent results recording 405 line signals.
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