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Old 14th May 2022, 8:09 am   #10
Heatercathodeshort's Avatar
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 8,744
Default Re: Ferguson - Thorn 980

That diode 'block' looks OK. It is the later type. The earlier one was larger and square. Both can be replaced with 1N4148 type diodes, they are not critical. The rear line and frame hold controls are often the cause of intermittent loss of line and frame hold. Cleaning does not help.

The 980 was included as a 'free' package when you rented a Thorn 2000 from DER [not Derwent]. John.
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