25-10-2014, 04:47 PM
Hi All,
I'm back in the garage working on this pesky 2 panel valve tester and I am not about to give up on it. I have now rewired the rollers in order to wire the 9 pin plug from the valve base section to the meter unit. I'm trying to test each connection to determine whether the roller configuration is correct. However, I cannot ascertain the relationship between the various valve base wirings to the rollers and the valve base pin connections. If I set all of the rollers to position 1 (cathode) then I should be able to check the continuity between the cathode connection at the 9 pin plug and the same position on each valve base and so on. However, in checking the English octal base, this does not appear to be the case. I've included a liitle text from the Avo manual below. Can some kind soul point give any helpful guidance here please?
Many thanks
Rob
When the symbol * appears in the selector switch figures, it indicates that the unknown electrode may be connected to a pin internally. To obtain the complete selector switch coding, test with an ohmmeter between the pin marked and all the others (the ohmmeter should be on a sufficiently low range to discriminate between a dead short and the filament resistance). Dependent upon the electrode to which this pin is connected, the correct selector switch code can be set up and the valve tested in the normal manner.
When the pin marked * is open circuit to all the others, set roller to 0.
When the pin marked * is connected to:
Cathode set roller to 1.
Heater - ,, 2.
Heater + ,, 3.
Grid ,, 4.
Screen ,, 5.
Anode 1 ,, 6.
Anode 2 ,, 7.
Diode 1 ,, 8.
Diode 2 ,, 9.
I'm back in the garage working on this pesky 2 panel valve tester and I am not about to give up on it. I have now rewired the rollers in order to wire the 9 pin plug from the valve base section to the meter unit. I'm trying to test each connection to determine whether the roller configuration is correct. However, I cannot ascertain the relationship between the various valve base wirings to the rollers and the valve base pin connections. If I set all of the rollers to position 1 (cathode) then I should be able to check the continuity between the cathode connection at the 9 pin plug and the same position on each valve base and so on. However, in checking the English octal base, this does not appear to be the case. I've included a liitle text from the Avo manual below. Can some kind soul point give any helpful guidance here please?
Many thanks
Rob
When the symbol * appears in the selector switch figures, it indicates that the unknown electrode may be connected to a pin internally. To obtain the complete selector switch coding, test with an ohmmeter between the pin marked and all the others (the ohmmeter should be on a sufficiently low range to discriminate between a dead short and the filament resistance). Dependent upon the electrode to which this pin is connected, the correct selector switch code can be set up and the valve tested in the normal manner.
When the pin marked * is open circuit to all the others, set roller to 0.
When the pin marked * is connected to:
Cathode set roller to 1.
Heater - ,, 2.
Heater + ,, 3.
Grid ,, 4.
Screen ,, 5.
Anode 1 ,, 6.
Anode 2 ,, 7.
Diode 1 ,, 8.
Diode 2 ,, 9.
if all else fails...read the instructions!
