25-12-2016, 10:40 AM
I've just checked the list of Philips valve codes in the hope of decoding yk1 w4k but, unfortunately, it only covers valves manufactured since 1948.
The picture shows a picture of a red painted valve which I thought was much later than 1927 - the picture is of a side contact valve dated around 1938. Wouldn't a 1927 valve be painted gold?
Unlike later valves with the type number print directly on the glass which, as we all know, rubs off very easily, the black print on red or gold is much more permanent.
Another oddity is 1927 both on the valve and the box. When did anybody see the date of manufacture printed on either?
So my thinking is turning to 1927 being the valve type number - but a Philips valve with an entirely numeric type number?
Quite possible, in fact - see this list and scroll down to the bottom ...
No 1927 - but this list only covers 1920 - 1930 and there aren't any later lists on the site ...
The picture shows a picture of a red painted valve which I thought was much later than 1927 - the picture is of a side contact valve dated around 1938. Wouldn't a 1927 valve be painted gold?
Unlike later valves with the type number print directly on the glass which, as we all know, rubs off very easily, the black print on red or gold is much more permanent.
Another oddity is 1927 both on the valve and the box. When did anybody see the date of manufacture printed on either?
So my thinking is turning to 1927 being the valve type number - but a Philips valve with an entirely numeric type number?
Quite possible, in fact - see this list and scroll down to the bottom ...
No 1927 - but this list only covers 1920 - 1930 and there aren't any later lists on the site ...
