[Elecraft] K3 - why SWR change with an amplifier

Jorge Diez CX6VM cx6vm.jorge at gmail.com
Thu Mar 29 20:22:08 EDT 2012


Don

The amplifier is a Drake L7

I will test with a ALS1300 to see what happens

So what do you think? My L7 is doing something bad?

I really dont like to see more than 3 bars in my K3 SWR meter. I tune with the internal tuner and is better, but I dont know if I had something bad that I need to solve

Thanks
Jorge


Enviado desde mi BlackBerry® device de Antel

-----Original Message-----
From: Don Wilhelm <w3fpr at embarqmail.com>
Sender: elecraft-bounces at mailman.qth.net
Date: Thu, 29 Mar 2012 19:39:03 
To: ab2tc<ab2tc at arrl.net>
Reply-To: don at w3fpr.com
Cc: <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] K3 - why SWR change with an amplifier

He did not say it was a KPA500!  Maybe it was some other amplifier that 
we cannot comment on.
If it were the KPA500, I would have asked "what bands".

73,
Don W3FPR.

On 3/29/2012 7:26 PM, ab2tc wrote:
> Hi,
>
> But is it normal for the KPA500 input SWR to be 2:1?
>
> Knut - AB2TC
>
>
> Don Wilhelm-4 wrote
>> Jorge,
>>
>> With the amplifier in standby, the K3 wattmeter sees the antenna SWR -
>> the same as when the antenna is connected to the K3.
>> When the amp is switched to operate, the K3 will see the input SWR of
>> the amplifier - and that has no relationship with the antenna.
>>
>> 73,
>> Don W3FPR
>>
>> <snip>
>>
>
> --
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