Re: Stella 239U. Capacitor ID.
I attach some scans from the official Stella 239U service manual: circuit (in 2 parts) and the under chassis layout.
From the parts list, I see that there is (rather surprisingly) an 820pF 400V 10% PAPER capacitor used: C47, Philips part number 48.75.10/820E.
So, we now know where the capacitor’s 820E marking comes from. C47 forms part of the de-emphasis filter on VHF/FM.
In the Stella manual, C57 is a 0.1uF 400V 10% paper type, part number 48.751.10/100K.
It is connected at the junction of two resistors: R36 (100kOhm) and R24 (220KOhm), in the triode anode circuit of the UABC80 valve V5.
Looking at the parts list, it looks like these paper capacitors capacitance value marking system is as follows:
8E2 = 8.2pF (where E = pF and is the decimal point’s position)
820E = 820pF
1K = 0.001uF (where K = 1nF)
1K5 = 0.0015uF (1.5nF and is the decimal point’s position)
10K = 0.01uF (10nF)
22K = 0.022uF (22nF)
47K = 0.047uF (47nF)
100K = 0.1uF (100nF).
C51 (1000pF, 1300Vdc, 20%, paper) is mounted on top of the audio output transformer.
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