Re: [Amps] HF2500 Power Supply Caps

[George <at6c@bellsouth.net>]

Ian and others,
What size glitch resistor would you use in an Alpha 77SX with two tubes?
73, George
W2GS

On 4/6/2014 2:39 AM, Ian White wrote:
> > Not all arcs happen ahead of the
> > glitch resistor or the HV fuse.
> Hopefully "ahead" was not what you really intended to write, Bill. The
> glitch (surge limiting) resistor protects against arcs that happen
> DOWNSTREAM toward the tube. The resistor will always help protect the
> tube and the RF components against arcs occurring inside the tube or
> anywhere in the RF section.
>
> The correct location for the HV fuse and the surge limiting resistor is
> directly connected to the top of the capacitor stack, so that it
> protects the maximum possible number of components downstream.
>
>
> 73 from Ian GM3SEK
>
>
> > -----Original Message-----
> > From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Bill
> > Turner
> > Sent: 06 April 2014 07:15
> > To: amps@contesting.com
> > Subject: Re: [Amps] HF2500 Power Supply Caps
> >
> > ORIGINAL MESSAGE:          (may be snipped)
> >
> > On 4/5/2014 1:29 PM, Jim Thomson wrote:
> > > ##  use whatever size cap you want.
> > REPLY:
> >
> > I disagree. Use the smallest cap that will give you the performance you
> > need in terms of ripple and dynamic regulation. Anything beyond that is
> > a waste and potentially damaging. Not all arcs happen ahead of the
> > glitch resistor or the HV fuse.
> >
> > Good designers are paid big bucks to accomplish the job without
> overkill
> > on parts specs. Learn to be one.
> >
> > 73, Bill W6WRT
> >
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