[Amps] Questions from a beginner

[Dave M]

another option of course is to find one of the old 11m amps , similar to the old Kris big boomers or the like and rebuild it for the bands you need , or look into some of the OLD ARRL handbooks , I remember seeing some small amps using the 6146 tubes and one using 4 x 6KD6's , these can be adapted to use the EL519's which altho are relatively expensive can still be obtained reasonably easily
 
Not REAL QRO but it will get you the experiance of putting something together and seeing it work and thats what it is all about , the destination is only one part of the task , the journey is all the fun  :)



......................................................................................................
 
73     VE3DV , Dave



 

> From: k7fm at teleport.com
> To: kc8wzb at gmail.com; amps at contesting.com
> Date: Mon, 4 Oct 2010 20:24:22 -0700
> Subject: Re: [Amps] Questions from a beginner
> 
> This is in response to Eric, wanting to add an amplifier to his Icom 703+.
> 
> Eric, there is a major problem. The Icom 703+ is a qrp rig, with an output 
> of 5 or 10 watts. The last I heard, amplifiers sold since about 1980 do not 
> operate at the 5 - 10 watt level. That is because the chicken banders were 
> using those amplifiers to illegally amplify 11 meter signals.
> 
> Most of the amps sold since then require 50 to 100 watts of drive.
> 
> So, your options are limited. Some military/commercial amps will drive with 
> your 5 - 10 watts, but they are rarer than the ham amps and will require 
> understand them. Ten-Tec sold a small amp that operated on their argonaut, 
> to boost the signal to 50 watts. But, they are quite rare.
> 
> The Central Electronics 600L would work ok - but they are not common.
> 
> Although this forum is about amplifiers, much of the discussion is bent 
> toward the other end of the power spectrum. For this group, 100 - 200 watts 
> is qrp.
> 
> At the power level , you may be better off building a 5 - 100 watt solid 
> state amplifier - but you will have to learn about solid state circuits and 
> building.
> 
> 73, Colin K7FM 
> 
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