26-08-2020, 11:27 PM
Thank you for all your messages and for the helpful article Frank: much appreciated.
I have found the download of the Sony CVM-90UB monitor manual. I will attempt to attach the file to this post so that Trevor, Jeffrey and anyone else interested can view it. (This is the first time, as a new GVR member, that I have tried an attachment - so hope it works.)
In answer to your question Richard: as you say, 405 lines can only be recorded on the VHS machine as baseband via the video line input. Therefore, the only way of making a video recording of a 405-line transmission would be from a 405-line receiver with a baseband video (and audio) line output. (The 9-90UB does have an audio line out, intended for recording on an audio tape recorder via the latter's microphone input.)
Some VHS machines from other countries do have a VHF tuner, but that would be for (625 or 525) negative vision modulation and FM sound, NOT the positive vision modulation and AM sound used for 405-line transmissions in the UK in the past (and to be replicated if Heritage get their 405 transmissions going, according to my understanding).
Best wishes,
Francis
I have found the download of the Sony CVM-90UB monitor manual. I will attempt to attach the file to this post so that Trevor, Jeffrey and anyone else interested can view it. (This is the first time, as a new GVR member, that I have tried an attachment - so hope it works.)
In answer to your question Richard: as you say, 405 lines can only be recorded on the VHS machine as baseband via the video line input. Therefore, the only way of making a video recording of a 405-line transmission would be from a 405-line receiver with a baseband video (and audio) line output. (The 9-90UB does have an audio line out, intended for recording on an audio tape recorder via the latter's microphone input.)
Some VHS machines from other countries do have a VHF tuner, but that would be for (625 or 525) negative vision modulation and FM sound, NOT the positive vision modulation and AM sound used for 405-line transmissions in the UK in the past (and to be replicated if Heritage get their 405 transmissions going, according to my understanding).
Best wishes,
Francis
Francis Niemczyk
