22-12-2011, 05:57 PM
Hello Mike, I am not an expert on meters but the first thing I would check if not already done so would be it's FSD with its rated current passing through it or by temp. substitution with say an AVO.
I have a receiver with a similar concept insofar that it's meter can be switched to monitor the anode current of any of the valves in the receiver thus giving a go / no go emission reading test, it is however dependant on AGC/RF gain settings which are Off and Full respectively, as to wether or not a meter movement can loose say 30% sensitivity I am not sure enough to say, I have never had it happen but that is not to say that it can't, defective internal shunt etc.
Lawrence.
I have a receiver with a similar concept insofar that it's meter can be switched to monitor the anode current of any of the valves in the receiver thus giving a go / no go emission reading test, it is however dependant on AGC/RF gain settings which are Off and Full respectively, as to wether or not a meter movement can loose say 30% sensitivity I am not sure enough to say, I have never had it happen but that is not to say that it can't, defective internal shunt etc.
Lawrence.
