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TonyDuell · 31st Mar 2019, 6:50 pm

I think it's unlikely that '804' means 800nF and '803' means 80nF here, for several reasons :

1) That convention is relatively recent (although the colour code that essentially uses it is much older) and is unlikely to be used in a 1940s motor

2) If the capactors are those values then the smaller is 10% of the larger. I would think the tolerance on said capacitors would be 10% at least, so no real point in adding the smaller one.

3) In any case why not just have one slightly larger capacitor. I could accept that a capacitor of twice the value (say) would not fit conveniently into the available space but I would have thought one of just 10% more could have been designed to fit.

I wonder if the numbers are a part number, serial number, date code or something.

31st Mar 2019, 6:50 pm	#4
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	Re: HMV Model 120 I think it's unlikely that '804' means 800nF and '803' means 80nF here, for several reasons : 1) That convention is relatively recent (although the colour code that essentially uses it is much older) and is unlikely to be used in a 1940s motor 2) If the capactors are those values then the smaller is 10% of the larger. I would think the tolerance on said capacitors would be 10% at least, so no real point in adding the smaller one. 3) In any case why not just have one slightly larger capacitor. I could accept that a capacitor of twice the value (say) would not fit conveniently into the available space but I would have thought one of just 10% more could have been designed to fit. I wonder if the numbers are a part number, serial number, date code or something.