In spite of a good suggestion, I still use a slight coating on the fuse to help insure that the contact remains the same in time. Gee, where did I learn that?
The heating and fire risk due to a shorted winding is why transformers usually contain an internal thermal fuse. This is something the fuse haters ignore as there is no way to tamper with it.
I'm posting this as a cautionary tale. This thread will also now be closed as this is a safety issue and the removal of protection is highly dangerous.
The fuse is absolutely necessary and its function is to protect you and your property in the event of a catastrophic fault.
I can speak from personal experience on this as my Pure DRX701 DAB tuner experienced a couple of cases of random blowing of its 100ma mains inlet fuse. I always replaced with the correct one and then a few weeks later it happened again. This time it wouldn't power up and it blasted the replacement fuse.
The tiny toroidal mains transformer had developed an internal short although the primary bizarrely read over 100k on a meter. Fitting a 3.15A fuse with the transformer on the bench resulted in rapid heating of the transformer and burning smells.
Its all here:
https://www.diyaudio.com/community/...-a-shorted-multi-secondary-toroid-psu.406202/
Can you imagine what might have happened if I had bypassed that fuse? I sometimes leave the tuner on and unattended while recording something to Minidisc.
So is the fuse necessary on your preamp. Absolutely it is and to do otherwise is spreading dangerous misinformation.
This thread will now be closed.
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