Philips Eindhoven once manufactured - on demand of the wartime Germans valve type LV 9 which should fit into their valve-base type A'; which was the true forerunner of the well-known “Rimlock valve series”,
from the late 1940s and say the 1950s
Think of the valve types:
EF 42, EL41, ECH 42 and that like.
How did it all started?
This story might be deigned by many, but let us follow the true course of history.
For it we have to go back to:
the periodical: FTM Heft 11/12 1942 by Reinhard Kretzmann
page 157 - 160
The Victor (winner) is always considered to be right, but is this always valid?
The Germans, I suppose guided by the GAF was keen to develop their wireless gear very compact and therefore necessitated new compact valve types.
For it a series of valves in various form and power was scheduled for.
Really astonishing types had been developed and introduced.
After the war it were the Russians who went on with German compact valve types; in particular the ceramic coaxial valves. Not available on the allied side until some time after the war.
Philips became also engaged, and gained the project to develop base-type A (Sockel A 1)
For Philips this wasn't very compromising, as the series hardly reached, with some exception, large production quantities.
I would like to advice you to consider first the article: Einheinheitsröhrenserie
However, at least some types reached some stage of production, such as type LV 9
A genuine wartime Philips data sheet containing some GAF (RLM) data
on top we notice the LV 9 valve
The names on the right-hand top originating from a spy-ring inside Philips Eindhoven.
Towards the late days of September 1924
Watson-Watt and a team visited the Philips factories in Eindhoven:
Ending with: CIOS File No. III-1: Philips Works at Eindhoven
Watson Watt fulminated to the heads of Philips that they should stop their silly clumsy valve designs and should instantly produce Allied valve types!
One of these types was the LV 1 Those familiar with the post-war Rimlock valve types, might recognise the base construction which is having similarities to the post-war Rimlock valve series (think of EF 42, ECH 42 EL 41 .... .
I considered it, that there are similarities.
One of these types was the LV 1 Those familiar with the post-war Rimlock valve types, might recognise the base construction which is having similarities to the post-war Rimlock valve series.
One of these types was the LV 1 Those familiar with the post-war Rimlock valve types, might recognise the base construction which is having similarities to the post-war Rimlock valve series.
Why not checking that what I expect is valid? the "Press-glass" base is similar to the post-war Philips constructions.
Would it really fit concerning the pin-configuration and sizes?
Yes, indeed, the glass-rim is fitting perfectly and without force the valve-base-pins softly enters the Rimlock socket
Really?
Indeed, both fit perfectly together
Without harming the Philis Concern reputation, they had developed a base-type A for the Germans, but also laid their successful post-war Rimlock valve type.
What a nice closure of what was understood, name it estimated, but now simply proved the actual relevance.
By Arthur O. Bauer
