21-12-2017, 05:12 PM
Hi Jeffrey, the 1807 was a truly terrible set and yet in terms of cabinet construction and quality it was as good as any any other EMI product. I'd guess that EMI tried to compete with the true masters at making low cost TV receivers, Sobell.
The very first Sobell TV sets were beautifully over engineered but before long the company realised low cost reliable TV sets were the only way to survive in a very competitive market place. The first low cost Sobell TV was the T90 of 1949 which was a neat little 9"CRT table model. A year later the T121 came along. The circuit design of this set was almost certainly derived from the Mullard application notes. The T121 was housed in a Bakelite console cabinet.
Possibly the worst 405 line TV set ever made was the Spencer-West 9" portable TV, it was made in 1957.
With reference to the PCL85, in competition with Mullard Ltd. Mazda developed the reliable 30PL13 for service as a frame output valve in TV receivers equipped with the 110 degree CRT. Clever thing about the 30PL13 and 30PL14 was that it was pin for pin compatible with the PCL82. Manufactures didn't need to redesign PCB artwork in order to use the new valve. For example Regentone and Rediffusion employed the 30PL13 in lieu of the PCL82 in TV receivers that were originally designed to employ 90 degree CRTs.
Geordie McBoyne.
The very first Sobell TV sets were beautifully over engineered but before long the company realised low cost reliable TV sets were the only way to survive in a very competitive market place. The first low cost Sobell TV was the T90 of 1949 which was a neat little 9"CRT table model. A year later the T121 came along. The circuit design of this set was almost certainly derived from the Mullard application notes. The T121 was housed in a Bakelite console cabinet.
Possibly the worst 405 line TV set ever made was the Spencer-West 9" portable TV, it was made in 1957.
With reference to the PCL85, in competition with Mullard Ltd. Mazda developed the reliable 30PL13 for service as a frame output valve in TV receivers equipped with the 110 degree CRT. Clever thing about the 30PL13 and 30PL14 was that it was pin for pin compatible with the PCL82. Manufactures didn't need to redesign PCB artwork in order to use the new valve. For example Regentone and Rediffusion employed the 30PL13 in lieu of the PCL82 in TV receivers that were originally designed to employ 90 degree CRTs.
Geordie McBoyne.
