20-03-2018, 09:50 PM
The monitors listed in the Video Yearbooks of the late 1970s are mostly classified as grade 1, grade 2 or grade 3. These gradings applied to both colour and monochrome units.
Grade 1 appeared to have encompassed the top level professional units.
Grade 2 was a mix. Some units appear to have been purpose-designed for industrial applications. Others appeared to have been derivatives of domestic TV receivers, or in some cases, such as the Barco CRM2631, upper level domestic receivers.
Grade 3 appeared to have been comprised of modified domestic receivers or derivatives thereof.
I have never seen any definition of those gradings, so I do not know whether they were embodied in a quantitative standard, or were de facto qualitative categories based upon intended end-use, or were somewhere in between. But I imagine that picture geometry and stability were significant parameters.
I recall from the 1970s that some NZ TV studio programmes showed the panel of commentators looking at what appeared to be Philips K9 domestic TV receivers. That (with 26-inch screen) was the dominant model in NZ during the early years of colour. Whilst the K9 was a global model, the NZ and I think the Australian versions had an isolated power supply, in accordance with the higher safety standards applicable here, so were fit for industrial and broadcast use as supplied. I have a vague notion that the Australian version had a rotary channel selector, whereas the NZ version had the standard push-buttons. An industrial monitor version of the K9 was offered in the UK:
In Video Yearbook 1978 it was described as being of grade 3.
Regarding large-screen domestic TV receivers fitted with baseband video inputs and outputs, I suspect one of the earliest might have been the Sony CVM-2300U of 1965, intended to work with the CV-2000 series VTRs:
Sony was on the right track in using baseband interconnections between domestic-oriented VTRs and TV receivers; the later widespread use of RF interconnections as the primary means was surely a retrograde step. In the UK, the 19-inch CVM-2000 was available in 1968:
The Decca Professional 23 of 1967 had optional video baseband inputs and outputs, and came as standard with an isolated power supply and an audio output suitable for feeding hi-fi systems. The latter feature had been found on some – a minority I think – American domestic TV receivers since the early days. It also had better-than-usual picture geometry, so might have been in the grade 2 class.
Cheers,
Steve
Grade 1 appeared to have encompassed the top level professional units.
Grade 2 was a mix. Some units appear to have been purpose-designed for industrial applications. Others appeared to have been derivatives of domestic TV receivers, or in some cases, such as the Barco CRM2631, upper level domestic receivers.
Grade 3 appeared to have been comprised of modified domestic receivers or derivatives thereof.
I have never seen any definition of those gradings, so I do not know whether they were embodied in a quantitative standard, or were de facto qualitative categories based upon intended end-use, or were somewhere in between. But I imagine that picture geometry and stability were significant parameters.
I recall from the 1970s that some NZ TV studio programmes showed the panel of commentators looking at what appeared to be Philips K9 domestic TV receivers. That (with 26-inch screen) was the dominant model in NZ during the early years of colour. Whilst the K9 was a global model, the NZ and I think the Australian versions had an isolated power supply, in accordance with the higher safety standards applicable here, so were fit for industrial and broadcast use as supplied. I have a vague notion that the Australian version had a rotary channel selector, whereas the NZ version had the standard push-buttons. An industrial monitor version of the K9 was offered in the UK:
In Video Yearbook 1978 it was described as being of grade 3.
Regarding large-screen domestic TV receivers fitted with baseband video inputs and outputs, I suspect one of the earliest might have been the Sony CVM-2300U of 1965, intended to work with the CV-2000 series VTRs:
Sony was on the right track in using baseband interconnections between domestic-oriented VTRs and TV receivers; the later widespread use of RF interconnections as the primary means was surely a retrograde step. In the UK, the 19-inch CVM-2000 was available in 1968:
The Decca Professional 23 of 1967 had optional video baseband inputs and outputs, and came as standard with an isolated power supply and an audio output suitable for feeding hi-fi systems. The latter feature had been found on some – a minority I think – American domestic TV receivers since the early days. It also had better-than-usual picture geometry, so might have been in the grade 2 class.
Cheers,
Steve
