Philips GM6004 Voltmeter (1951)
![GM6004-front.jpg](GM6004-front.jpg)
Principle of operation: two-pentode bridge.
A view from the back.
The valve line up is:
I bought this meter in 2008. It was in reasonable condition but the case had been painted creamy white. Originally, it has a hammered metal finish case which dates it in the 1950's. The original version is from 1949 and used EF6 penthodes. The /02 version dates from 1951 and has EF40 Rimlock penthodes. This specimen seems to be from around that time. There is something like a date code on one of the potmeters that seems to point at 1950. Someone has scribbled a note on the chassis that says the instrument was ok (callibrated? ) in 1953. Looking inside, I saw the chassis looked well, but the power electrolytic had been leaking. Need to replace that one, and remove the white paint.
A closer look at the components on top of the chassis.
I will fix it later on
Copyright © 2008 by Onno's E-page published 2008-10-24