[Amps] one more time - Ameritron fuse question

[R.Measures]

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