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Herald1360 · 30th Sep 2021, 1:39 am

What anode load on V3? Its anode load is a couple of IFT primaries. There's only the decoupling RC in series with them.

Typical Ia for the pentode is given as 5mA in the datasheet so 4.5mA doesn't seem way out of line.

30th Sep 2021, 1:39 am	#14
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,536	Re: Philips 543A problem detector stage What anode load on V3? Its anode load is a couple of IFT primaries. There's only the decoupling RC in series with them. Typical Ia for the pentode is given as 5mA in the datasheet so 4.5mA doesn't seem way out of line. __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O