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allan · 3rd Dec 2019, 10:47 am

Sorry Dave. My receiver is the rare Moreton Cheyney which I'm attempting to resurrect. It has a similar problem with the local oscillator to that in this discussion ie. it only works on one of its 5 wavebands and only partly on the that one.
The chassis is roughly the same size as the AR88.
I've been down the same route trying to get my 6K8 oscillating as the 6J5 in the AR88 in this thread. Like 2-heads are better than one... 2 receivers may be better than one or a trouble shared is a trouble halved.
I'm now suspecting a bad earth contact. The 6K8 earthing point is a solder washer at the valveholder fixing screw but that is into a brass post secured to the steel chassis by another screw with some corrosion throughout. Lack of oscillation may be due to a combination of several minor problems.
Allan G3PIY

3rd Dec 2019, 10:47 am	#47
allan Pentode Join Date: Oct 2005 Location: South coast near Ringwood/Christchurch, Dorset, UK. Posts: 230	Re: RCA AR88D Comms Receiver. Sorry Dave. My receiver is the rare Moreton Cheyney which I'm attempting to resurrect. It has a similar problem with the local oscillator to that in this discussion ie. it only works on one of its 5 wavebands and only partly on the that one. The chassis is roughly the same size as the AR88. I've been down the same route trying to get my 6K8 oscillating as the 6J5 in the AR88 in this thread. Like 2-heads are better than one... 2 receivers may be better than one or a trouble shared is a trouble halved. I'm now suspecting a bad earth contact. The 6K8 earthing point is a solder washer at the valveholder fixing screw but that is into a brass post secured to the steel chassis by another screw with some corrosion throughout. Lack of oscillation may be due to a combination of several minor problems. Allan G3PIY