Steve,
I was speaking of the case where I have a brick on the key (A0).
When I measured the power factor of the amp in this mode a
while back, it was something like 0.80. I would agree with you
that line voltage drop would be hard to measure in intermittment
CW or SSB service, but in A0 (brick on key), I think its pretty
straightforward. Or am I missing something?
73 de Mike, W4EF................
----- Original Message -----
From: "Steve Thompson" <g8gsq@ic24.net>
To: <amps@contesting.com>
Sent: Friday, December 03, 2004 12:17 AM
Subject: Re: [Amps] Current draw at 110 volts for SB-200 and SB-1000
> Michael Tope wrote:
> > I run my Drake L-7 off a 110V drop and it seems to do fine. I get
> > about 1200 watts output with 100 watts of drive. Checking it just
> > now, line voltage drops from 117.7 to 111.7 VAC when I go key down
> > with maximum exciter drive (about 100 watts). There is a small, but
> > perceptible dimming of the lights in the shack and hallway (the
> > circuit in the hallway drops about 1.5 VAC when I key the amplifier).
>
> Part of the problem is that the current the amp pulls (or tries to pull)
is
> not like a resistive load but is taken in big gulps for a short period.
The
> peak current is many (typ 5-10) times the 'average' you work out from the
dc
> input. The drop from this tends not to show to its full extent on ac
voltage
> readings and dimming lights, but does hit the ht in the amp.
>
> Steve
>
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