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Uncle Bulgaria · 4th Mar 2019, 5:44 pm

Thanks again, Lawrence.

The power supply has been running all yesterday afternoon on a bulb limiter, with no ill effects and a steady 375V on the choke/reservoir capacitor junction. It is almost time to plug the amplifier section in...

I'm quite pleased with how well it's cleaned up! I've left the top plate in its original state to retain some of its history and I'm gradually reattaching parts to it. I've rebuilt the switches and re-soldered a number of broken connections in the plugs from over-flexed, work-hardened or corroded joints.

4th Mar 2019, 5:44 pm	#42
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,329	Re: Ferrograph 4A: Restoration advice needed Thanks again, Lawrence. The power supply has been running all yesterday afternoon on a bulb limiter, with no ill effects and a steady 375V on the choke/reservoir capacitor junction. It is almost time to plug the amplifier section in... I'm quite pleased with how well it's cleaned up! I've left the top plate in its original state to retain some of its history and I'm gradually reattaching parts to it. I've rebuilt the switches and re-soldered a number of broken connections in the plugs from over-flexed, work-hardened or corroded joints.