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G6fylneil · 27th Sep 2022, 6:14 pm

In 1990 I replaced most of the resistors in my 840C as they had all gone high, this improved the sensitivity slightly and brought the HT down a bit. It's still got all its Hunts capacitors, apart from the brown "tone" one on the output anode. (these sets have a 350V tubular ceramic as "that capacitor"). I replaced the carbon rf gain pot. with a wire-wound one, as it had a high end resistance. The rf amp. cathode resistor had burnt out and been shorted, not an easy part to access. The main smoother looks to have been replaced at some point, but it's dated 1966 and still ok.

27th Sep 2022, 6:14 pm	#7
G6fylneil Pentode Join Date: Sep 2011 Location: Coventry, West Midlands, UK. Posts: 210	Re: Eddystone 840C In 1990 I replaced most of the resistors in my 840C as they had all gone high, this improved the sensitivity slightly and brought the HT down a bit. It's still got all its Hunts capacitors, apart from the brown "tone" one on the output anode. (these sets have a 350V tubular ceramic as "that capacitor"). I replaced the carbon rf gain pot. with a wire-wound one, as it had a high end resistance. The rf amp. cathode resistor had burnt out and been shorted, not an easy part to access. The main smoother looks to have been replaced at some point, but it's dated 1966 and still ok.