My earlier comment about a choke with shorted turns
was assuming that the supply was under load at the
time of the voltage measurement. K5GW makes a
very relevant comment in that regardless of shorted turns
or not, if the supply is unloaded, not even by a bleeder,
then the voltage will soar. So be sure to measure the
voltage with a load, at least a bleeder. I mean a hefty
significant current bleeder. Better yet under the normal
load of the final amplifier.
- JimT
> Choke input filter type power supplies require a quite a bit of bleeder
> current to prevent voltage soaring like you describe.
> I suggest you confirm that the bleeder
> resistor(s) are in good condition.
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|