----- Original Message -----
From: "Paul Decker" <kg7hf@comcast.net>
To: <amps@contesting.com>
Sent: Saturday, November 07, 2009 10:25 PM
Subject: [Amps] HV ripple voltage
>
>
> Hey amp builders,
>
>
>
> As a general rule, what would be considered "good" regulation and good
> ripple of an HV power supply?
>
> If the no load voltage for a 3cx800A7 amplifier's power supply is 2500 V,
> while the fully loaded voltage is 2100 V @ 1A, is that "good"? Is it good
> enough?
Its better than a SB-220 and about the same as many other amps. A 10%
regulation is considered the benchmark but its seldom met when pricing
competition is stiff. On SSB with a 30% duty cycle (no processor) the
dynamic regulation will be much better.
>
>
>
> What about the ripple, what is acceptable? For the above, using 330 uF
> capacitive input filter and a full wave bridge, the ripple is calculated
> to about 25V p-p. Is that "good enough"
>
If that is 8 @ 330uF that gives a 41uF filter which is very good. I dont
have the books open (heading to bed) but that should give you around 1-2%
ripple. Heath, Alpha, Ameritron, etc use less C. The effect is linear;
double the C and the ripple is cut in half.
Carl
KM1H zzzzzzzzzzzzzzzzzzzzzz
>
>
> thanks,
> Paul (KG7HF)
>
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