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Jon_G4MDC · 25th Jun 2020, 10:56 am

I wonder if anyone can help with this?

The PF8 was constructed using plug in modules some of which were conventional contruction while others were potted in epoxy. Of course the epoxy ones are pretty much unrepairable.

As far as I can remember the PF8 schematic treated each module as a box with only the functional symbol for what it does, multiplier, PLL, AF Amp etc.
Has anyone seen any more detailed info please?

I want to experiment with the DC/DC converter. It used 2x 1.2V NiCads and a DC/DC to ~10V for the main supply - I have no idea why they chose to do that. The DC/DC Converter is one of the "fixable" modules so the circuit could be traced out if needs be.

I would like to see if it would be safe to run it from a single 3.7V Lithium Cell or if it could be modified to do so.

25th Jun 2020, 10:56 am	#1
Jon_G4MDC Nonode Join Date: Nov 2015 Location: Welwyn Garden City, Hertfordshire, UK. Posts: 2,015	Pye PF8 Circuit I wonder if anyone can help with this? The PF8 was constructed using plug in modules some of which were conventional contruction while others were potted in epoxy. Of course the epoxy ones are pretty much unrepairable. As far as I can remember the PF8 schematic treated each module as a box with only the functional symbol for what it does, multiplier, PLL, AF Amp etc. Has anyone seen any more detailed info please? I want to experiment with the DC/DC converter. It used 2x 1.2V NiCads and a DC/DC to ~10V for the main supply - I have no idea why they chose to do that. The DC/DC Converter is one of the "fixable" modules so the circuit could be traced out if needs be. I would like to see if it would be safe to run it from a single 3.7V Lithium Cell or if it could be modified to do so.