Here is is a slightly different version in use by member Vintage Rob.viewtopic.php?f=5&t=10576
I started to put together some rough notes about the Beamec with the intention of doing a comprehensive write up of what it does. Below is a copy of what I have so far.
I am pretty sure I put a copy of the user instructions in the library. I will check that later. I also have a more readable OCRd copy somewhere if anyone wants it
Pin1 = Pin 7 via 330k
Pin2 = A1
Pin3 = Grid
Pin4 = Cathode & +ve Volts
Pin 5 = Heater
Pin6 = Heater
Pin7 = A2
Pin8 = -ve Volts
A 32uF capacitor, charged to HT, is discharged across the named set of terminals.
When reforming capacitors prior to powering up the unit. The main 16uF and the 32uf cap up beside the meter must be done. S2 in the NORMAL position includes this capacitor. In CLEAR LEAK the capacitor is isolated
The oprating instructions state a meter sensitivity of 250uA. My 1958 dated meter is 500uA FSD. I do happen to know that tere is an internal shunt in the meter so perhaps the movement is rated at 250uA
Triode/ Pen -Tet Switch
Triode Pen - Tet
UUT Anode 0V 260V
UUT Grid 10V 4.75V
700Vrms is connected to a full a full wave voltage doubler. The +ve output is connected to the UUT A2, the -ve to UUT cathode???? The centre point of the doubler caps is connected to HT-ve(0V)
P.S. Sorry about the emission table. Not played with the table generator yet.