17-09-2017, 09:21 AM
Hi Nick.
Yes I've replaced many resistor droppers with capacitors. I have a cream DAC90A the cabinets of which are more susceptible to cracks from the hot dropper and valves. There is a big reduction in heat.
The other thing that comes to mind is the Murphy V430/530 with a 441ohm dropper for the Radio heaters right below the plastic EHT rectifier base, it goes brittle and carbonises again a cap dropper is a good mod. I use run caps and a discharge resistor across the cap. Not had one failure in 14 years.
Yes I've replaced many resistor droppers with capacitors. I have a cream DAC90A the cabinets of which are more susceptible to cracks from the hot dropper and valves. There is a big reduction in heat.
The other thing that comes to mind is the Murphy V430/530 with a 441ohm dropper for the Radio heaters right below the plastic EHT rectifier base, it goes brittle and carbonises again a cap dropper is a good mod. I use run caps and a discharge resistor across the cap. Not had one failure in 14 years.
