In my experiences, slow-blow fuses are preferable with a C-filter HVPS
due the high recurrent-peak requirement.
On Jan 7, 2005, at 8:00 PM, Dan wrote:
Well you guys are batting 100% so far i now have one more Ameritron
811H question. I have replaced the grid resitor and replaced all four
tubes (one was shorted causing the resitor to blow). All is well works
great never better...switched to 240 from 120 and even better. Great
output and amp seems happy sounds and works very well.....
now the problem. To keep the fuses to spec Ameritron states a 8 amp
fuse on both sides at 240 volt versus 12 amp at 120 volts. It was
running fine with the original 12 amp ceramiic 3ag 250 volt fuses but
thought i better get them down to the rated 8 amp. Put in a set of
C3ag 8 amp 250 v ceramic fast blo fuses and switched on the amp..
nothing. a little jump of the needles bit nothing. checked the fuses
both blown.. tried again same thing. replace with 10 amp fuses all
ok.... voltage on the 240 voly line is near 240 so it is where it
should be
should I try/use slow-blow fuses at 8 amps. would that be better then
the 10 or 12 amp fast blo fuses?
I do have a step start (slow start) device coming.. This might correct
the problem with fast blo at 8 amps.. BUT you guys are the experts..
thanks for any and all opinions...
Dan
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Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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