[Elecraft] Experience with KXPA100

[Igor Sokolov]

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" <jrichards at k8jhr.com>
To: <elecraft at mailman.qth.net>
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.
>
>
> ================================================
>
>
>
>
>
> /
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to ua9cdc at gmail.com