[Amps] My NCL-2000 warc band experiments

[Jim W7RY]

I think few US amateurs know that the maximum power output on 30 meters (10 
MHz) is only 200 watts.


There have been many questions here from US amateurs about amplifiers for 30 
meters. And I can't understand why. Sure, you have a QRP rig and want more 
power on 30 meters... I understand that one. But a KW amp?



73
Jim W7RY

----- Original Message ----- 
From: "Carl" <km1h at jeremy.mv.com>
To: <TexasRF at aol.com>; <franktbrady at comcast.net>; <amps at contesting.com>
Sent: Sunday, January 18, 2009 8:22 AM
Subject: Re: [Amps] My NCL-2000 warc band experiments


> The NCL works fine on 17M in the 15M position but the Q is a bit high,
> Operate only in the CW position, is linear for SSB.
>
> With 200W being the legal limit on 30M in the USA I have no suggestions
> for that .
>
> Carl
> KM1H
> National Radio 1963-69
> Member of NCL-2000 Design Team
> ----- Original Message ----- 
> From: <TexasRF at aol.com>
> To: <franktbrady at comcast.net>; <amps at contesting.com>
> Sent: Sunday, January 18, 2009 10:55 AM
> Subject: Re: [Amps] My NCL-2000 warc band experiments
>
>
>> Frank, asking out of curiosity here: did you by chance try 30m with
>> the 20m
>> position and 17m with the 15m position?
>>
>> If there is enough C in the variable caps you might reach resonance
>> without
>> having to add the coils taps. Granted the loaded Q will be higher but
>> at these
>> relatively low frequencies (compared to 10m) might work ok.
>>
>> On the heating effect; it is fundamentally an I squared times R thing.
>> The  R
>> could be higher, the I could be higher or both. I do know that a
>> soldered tap
>> will be much lower loss than the limited contact area provided by
>> alligator
>> clip  teeth.
>>
>> 73,
>> Gerald K5GW
>>
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