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vintage_8bit · 24th Aug 2019, 11:27 am

I changed R208 and R209 in the regulator circuit which were around 30% high. I also changed the plate rectifier for a modern one and fitted a series resister on its output. I wondered at the time if the valve was on its way out anyway.

24th Aug 2019, 11:27 am	#15
vintage_8bit Heptode Join Date: Feb 2013 Location: Rainham, Kent, UK. Posts: 525	Re: Marconi TF144H/4S I changed R208 and R209 in the regulator circuit which were around 30% high. I also changed the plate rectifier for a modern one and fitted a series resister on its output. I wondered at the time if the valve was on its way out anyway.