[Amps] Re-2: Henry 3K Classic stby. Input Power?

[Robert Bonner]

No do not increase the bleeder resistor values, that would allow the "choke
input" voltage of .9 times the supply voltage to climb to 1.4 times the
voltage acting like a "Cap input PS" and possibly do some amplifier damage.
If you did that you'd see a 1000V plus swing on the plate supply voltage
instead of rock solid.

BOB DD

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of dl4seq at amsat.org
Sent: Thursday, June 28, 2007 2:27 AM
To: sm0aom at telia.com; amps at contesting.com
Subject: [Amps] Re-2: Henry 3K Classic stby. Input Power?

Thank you all for the answers!
I could explain about 400w idle but forgot the 200w from the bleeders. I
find that quite a lot. Is it wise to increase the value of the resistors or
is it better to keep them and be lucky of a warm shack in winter (and a
sweaty op in summer...)?

Karl-Arne: First I measured the ac input with a very cheap
"pliers-amp-meter" (hope this is the correct translation) and u x i gave me
about 800w ac input. The second measure was with a adaptor for the ac line
that took care of cos(phi) giving the more realistic 600w.

Anyway I enjoy the amp (especially when looking at my new and unused Eimac
3cx1200a7 as a spare part in the shelf ;-)

73's
Markus, DL4SEQ.

-------- Original Message --------
Subject: Re: [Amps] Henry 3K Classic stby. Input Power? (27-Jun-2007 11:23)
From:    sm0aom at telia.com
To:      markus.grimminger at grau-aromatics.de

> Are you sure that you are measuring "active power (= U*I * cos (fi))"
when 
> in standby?
> The power factor of an idling capacitor input power supply can be quite
low.
> 
> 
> 73/
> 
> Karl-Arne
> SM0AOM
> 
> ----- Original Message ----- 
> From: <dl4seq at amsat.org>
> To: <amps at contesting.com>
> Sent: Tuesday, June 26, 2007 3:21 PM
> Subject: [Amps] Henry 3K Classic stby. Input Power?
> 
> 
> > Hello,
> > 
> > I bought a used Henry 3K Classic with one 3cx1200a7. The amplifier is 
> > working great and I am very satisfied with the quality of it. The output

> > power is very good and really sufficient (1.5kw). What surprises me is
the 
> > AC input during standby: 600w! Has anyone an idea if this is normal or
if 
> > there is a problem?
> > 
> > Many thanks for every hint and 73's!
> > Markus, DL4SEQ
> > 
> > _______________________________________________
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> > 
> > 
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To: sm0aom at telia.com
    amps at contesting.com


To: sm0aom at telia.com
    amps at contesting.com

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