It was worth mentioning that my KX3 is supplied from the second pair of APP
connectors of KXPA100. Therefore KX3 shows the total voltage drop on all the
wires including relatively thin wires going from KXPA100 to KX3. These wires
add about 0.6V drop to the picture.
The power supply though is pretty good. It is ALINCO 330 capable of 30 amps.
I just wanted to stress that output power of KXPA100 is pretty dependant on
PS voltage and voltage drop in the wires.
73, Igor UA9CDC
----- Original Message -----
From: "K8JHR" <[email protected]>
To: <[email protected]>
Sent: Wednesday, June 25, 2014 6:37 AM
Subject: Re: [Elecraft] Experience with KXPA100
Er... um... is such a large voltage drop typical? We don't see that
happening on Brand X amps using good power supplies. I understand the
voltage drop when going from, say, 10 to 100 watts should be minimal, like
no more than .2 volts. I have also seen this sort of power output
weakness in some transceivers which are rather picky about voltage sag
when running full tilt.
I would check the power supply and try one that does not sag more than .1
or .2 volts on full power. I suspect the amp is good, the power supply
not.
Just My take.
-------------------- K8JHR --------------
On 6/24/2014 4:46 PM, Igor Sokolov wrote:
it much depends on the voltage of the
power supply and voltage drop on the feeding wires.
The voltage drop at this power is about 1.2 V according
to KX3 meter.
The voltage meter of KX3 shows then 11.1 V at that power.
IMHO KXPA100 is pretty sensitive to voltage of the power supply.
================================================
/
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