Reply with quote #1
I have some questions regarding the fusing section of the Beast - as I'm scratch building mine I need to make sure I'm getting the correctly-rated parts.
Q1. The Beast instructions specify that the fuses should be 1 amp. However, the Son of Beast, which has what looks like a similar output stage, uses half-amp fuses. So should I still be using 1 amp fuses for the Beast? Q2. Presumably in either case these fuses should be type T (timed, slo-blow)? Q3. For the fuse-holders, I bought Bussman HTC-30M holders which are rated 250V, 6.3A, 2.5W. I subsequently read that current ratings are typically applicable for fast-blow fuses, and that the rating would reduce for slo-blow. That said, the same article suggested that a 6.3A rating should still be okay for a 1A slo-blow, but can I just sanity check these holders are okay, or should I go to 10A ones? Many thanks.
Reply with quote #2
David, you are thinking waaaaay too hard about stuff that does not matter!
1. use 1 amp fast blow.....just like The Beast instructions say. 2. see above 3. any fuse holder you can buy will be fine for a 1 amp fuse...... Ed
Reply with quote #3
Those are slow blow fuses.
Reply with quote #4
Thanks Bruce, I forgot. I use slow blow because my speakers have no xover and the slow blow does not open fast enough to protect them when "something happens". After losing a driver or two (all my tubes are very old and occasionally "snap and pop") I changed to "regular" and it "solved" my problem. 1/2 amp slow blow did not protect the driver either, btw. I am pretty sure a "normal" speaker with a crossover will be MUCH less sensitive to an event that will pop either type of fuse.
Just a small margin of extra safety and I have no problems with them holding up unless a tube sparks or snaps and then they do their job. Ed ps......after building several sets and owning a pair right now I should have remembered that! I also am running just 4 tubes in each amp......sounds great and has plenty of power for my speakers. I'll probably never run 8 or 16 again but I do need new tubes!