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Old 1st Jun 2020, 11:37 pm   #6
sexton_mallard
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Join Date: Sep 2013
Location: Ellesmere, Shropshire, UK & Co. Cork, Ireland.
Posts: 499
Default Re: Ferguson 384U (Finesse)

Progress has been good with replacement of all the Hunts caps and a couple of resistors that were over 2x high in value. The dial string was reused as I did not have any suitable replacement. The break was knotted and sealed with a dot of super glue and does not cause a problem when this small lump goes around the pulleys. The last job on the chassis to do is investigate the smoothing/reservoir can. The set performs well on FM and MW/LW with plenty of volume.

The UL84 grid cap was replaced but the grid voltage slowly creeps up from a few millivolts to about 250 millivolts after about 10 minutes. I guess the valve must have a internal leak. Once the smoothing can has been sorted I will run the set for longer keeping an eye on the voltage. Is this fairly typical/acceptable for a UL84 which looks original? I don't have a substitute with me at the moment, the radio I borrowed a UL84 from is currently not accessible.
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