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Ed_Dinning · 20th Oct 2004, 8:00 am

Hi Dave, understood about the train transformer. I would have thought that the higher resistance (R) of the field coil as measured with an Avo would lead to a greater volt drop and was possibly used to reduce the voltage to the set. The reactance (X) is a measure of the inductance of the coil and will reduce the hum level by acting as a resistance to AC only. The resultant sum of these 2 is impeadance (Z). Try the resistor and see what happens.
Ed

20th Oct 2004, 8:00 am	#16
Ed_Dinning Dekatron Join Date: Jan 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 8,195	Re: Bush PB53 Output stage problems Hi Dave, understood about the train transformer. I would have thought that the higher resistance (R) of the field coil as measured with an Avo would lead to a greater volt drop and was possibly used to reduce the voltage to the set. The reactance (X) is a measure of the inductance of the coil and will reduce the hum level by acting as a resistance to AC only. The resultant sum of these 2 is impeadance (Z). Try the resistor and see what happens. Ed