[Amps] The power of an oversized electrolytic capacitor / pragmatism rules

[Leigh Turner]

Yes Peter, you won't go astray if you take your clues from what the leading
commercial and professional vendors of the tube amplifier era did in their
power supply designs; all based on pragmatic time proven sound engineering
principles.

There's no significant benefit (perceived or actual) to be gained in going
much beyond 60 uF or so in a single-phase FWB capacitor reservoir filter HV
power supply used in today's mainstream QRO amplifiers.

Homebrewers with a parts junk box full of big electrolytics may wish to err
on the large size with a 120 uF or so; but doing so will take you way past
the diminishing return point. Having a stiff / non-sagging AC mains feed and
a "big" weighty core + copper HV transformer are more important factors in
achieving good load regulation in dynamic SSB linear service.

Leigh
VK5KLT


-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Peter Voelpel
Sent: Sunday, 20 May 2012 1:01 AM
To: amps at contesting.com
Subject: Re: [Amps] The power of an oversized electrolytic capacitor /

I certainly did.

I looked up what the commercials did.

No large glitch resistor, just current sensor and fast cut off for the
transformers.

All have choke filter inputs, so have mine. The largest filter capacitor is
sitting in my 4CX3000A amp running single phase it is 12µF.

Those within my 3-phase P/S are between 2-9µF. 

73
Peter; DJ7WW


-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Jim Thomson

For you folks that go on and on and on abt diminishing returns,  why don’t
you toss the arrl book in the trash..and find out for yourselves. 


_______________________________________________
Amps mailing list
Amps at contesting.com
http://lists.contesting.com/mailman/listinfo/amps