K3 144mhz power

[Rick Braun]

Is the 144 mhz module limited to 10 watts, even in a K3/100?  

R.H. Braun
KE7VXP
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[M0XDF]

That's what it says - I doublt the KPA3 is designed to handle 2m and  
the module has it's own Ant. socket.
--
In theory, there is no difference between theory and practice,
but in practice there is.

On 14 May 2009, at 15:55, Rick Braun wrote:

> Is the 144 mhz module limited to 10 watts, even in a K3/100?

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[K2QI]

One could always purchase or build there own external 2m linear as an
option.

73 de James

On Thu, May 14, 2009 at 10:58 AM, David Ferrington, M0XDF <
[hidden email]> wrote:

> That's what it says - I doublt the KPA3 is designed to handle 2m and
> the module has it's own Ant. socket.
> --
> In theory, there is no difference between theory and practice,
> but in practice there is.
>
> On 14 May 2009, at 15:55, Rick Braun wrote:
>
> > Is the 144 mhz module limited to 10 watts, even in a K3/100?
>
>  ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
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> Please help support this email list: http://www.qsl.net/donate.html
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... [show rest of quote]

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[hf4me]

I don't see 10 watts as a problem.  How many 2 meter amps do you have on the
shelf just waiting to be used again?  40 w 15 years old ($90 new then), two
converted police amps (ugly but they work well) both run over 85 watts
continuous with 5 watts in ($50) at hamfests if there any still around) and
a 140 w that takes 2 watts drive for full power and the other is a 160 w
that runs full output at 35 watts and over half of that from an ht (don't
remember exactly how much).  10 watts a problem? - i just don't see it.

Lots of external amps out there.
73, Jim KG0KP

----- Original Message -----
From: "K3JPS" <[hidden email]>
To: "David Ferrington, M0XDF" <[hidden email]>
Cc: <[hidden email]>
Sent: Thursday, May 14, 2009 12:07 PM
Subject: Re: [Elecraft] K3 144mhz power

> One could always purchase or build there own external 2m linear as an
> option.
>
> 73 de James
>
> On Thu, May 14, 2009 at 10:58 AM, David Ferrington, M0XDF <
> [hidden email]> wrote:
>
>> That's what it says - I doublt the KPA3 is designed to handle 2m and
>> the module has it's own Ant. socket.
>> --
>> In theory, there is no difference between theory and practice,
>> but in practice there is.
>>
>> On 14 May 2009, at 15:55, Rick Braun wrote:
>>
>> > Is the 144 mhz module limited to 10 watts, even in a K3/100?
>>
>>  ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

... [show rest of quote]

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[Mike Harris-9]

Cascading IPs maybe if you're running an intermediate amp to drive the big
one.

Regards,

Mike VP8NO

----- Original Message -----
From: "Jim Miller KG0KP" <[hidden email]>
To: "Elecraft Reflector" <[hidden email]>
Sent: Sunday, May 17, 2009 12:33 AM
Subject: Re: [Elecraft] K3 144mhz power - 10 watts not a problem


|I don't see 10 watts as a problem.  How many 2 meter amps do you have on
the
| shelf just waiting to be used again?  40 w 15 years old ($90 new then),
two
| converted police amps (ugly but they work well) both run over 85 watts
| continuous with 5 watts in ($50) at hamfests if there any still around)
and
| a 140 w that takes 2 watts drive for full power and the other is a 160 w
| that runs full output at 35 watts and over half of that from an ht
(don't
| remember exactly how much).  10 watts a problem? - i just don't see it.
|
| Lots of external amps out there.
| 73, Jim KG0KP

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[K7TV]

Exactly. On 144 the weak signals are so weak that TX cleanness as well as RX
dynamic range become a very difficult problems. You want a minimum number of
TX stages to mess up the signal, and minimum phase noise. Most solid state
amp's that might be available in the shack may not be clean enough to drive
the big one. Hmmm.... years ago I was looking at a 144 legal limit amp
project described in the 1988 ARRL Handbook. It uses a tetrode and produces
full output with just 10W in. That one is now back on my list of dreams....

73,
Erik K7TV

----- Original Message -----
From: "Mike Harris" <[hidden email]>
To: "Elecraft Reflector" <[hidden email]>
Sent: Sunday, May 17, 2009 8:26 AM
Subject: Re: [Elecraft] K3 144mhz power - 10 watts not a problem

> Cascading IPs maybe if you're running an intermediate amp to drive the big
> one.
>
> Regards,
>
> Mike VP8NO
>
> ----- Original Message -----
> From: "Jim Miller KG0KP" <[hidden email]>
> To: "Elecraft Reflector" <[hidden email]>
> Sent: Sunday, May 17, 2009 12:33 AM
> Subject: Re: [Elecraft] K3 144mhz power - 10 watts not a problem
>
>
> |I don't see 10 watts as a problem.  How many 2 meter amps do you have on
> the

... [show rest of quote]

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