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## Re: [Amps] Filtering capacitor in a HV PS: How low can you get awaywith?

 To: Angel Vilaseca Re: [Amps] Filtering capacitor in a HV PS: How low can you get awaywith? R.Measures Tue, 17 Aug 2004 01:46:13 -0700
 On Aug 16, 2004, at 11:12 PM, Angel Vilaseca wrote: "R. Measures" wrote: On Aug 16, 2004, at 9:12 AM, Angel Vilaseca wrote: Hi, ```I am building a 2500 V power supply for a one-KW transmitter. It will use 2 4CX20Bs.``` I have two oil-filled capacitors: 2.5 KV 40 uF and a 4 KV 25 uF. I feel quite uncomfortable using the 40 uF 2.5 Kv one, because it would work very close to its voltage limit. ```On the other hand, the 4 KV 25 uF would be OK as far as voltage is concerned, but would not 25 uF be too low?``` Is there a rule of thumb ? Angel -- Yes. For a FWB, the filter C Å 50k / the R-load. For a FWD, each C Å 300k / R-load cheerz ```So assuming amp resistance at max output is 3Kohms, we have 16 uF for a FWB and 100 uF for a FWD (?)``` ** Yes, however, 2, 100uF capacitors in series are needed for FWD- so the net C is 50uF. I am not sure what FWB and FWD mean. ** FWB = full wave bridge rectifier, FWD = full wave (v)doubler. ```Is it inductance input filter and capacitor input filter? ```** C-only. Tnx fr your help ** You are welcome, Angel. Richard L. Measures, AG6K, 805.386.3734. www.somis.org ```_______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps```
 Current Thread [Amps] FS: Panel Meters, Radio WC6W [Amps] Filtering capacitor in a HV PS: How low can you get awaywith?, Angel Vilaseca Re: [Amps] Filtering capacitor in a HV PS: How low can you getawaywith?, Ian White, G3SEK Message not available Message not availableRe: [Amps] Filtering capacitor in a HV PS: How low can you get awaywith?, R . Measures <=