0-12-29 18.59, skrev Bob Marston på k1ta@contesting.com följande:
There is a big difference when you build your own amp: most hams have not
the knowledge and testing equipment to check their gear and very few hams on
the bands nowadays have the knowledge to give an accurate report. Besides
that, most hams accept a lot of splatter, sorry to say.
And very few hams know how to tune up an amp for good linearity. So, using a
commercial amp does in no way guarantee a clean signal.
Prosit de Hans SM5KI
> On Fri, 29 Dec 2000 06:05:54 -0800, Bill Turner wrote:
>
>> Do you, Mr Marston, build your own cars from scratch? If not, why not?
>> Too lazy? That would be a learning experience too, wouldn't it?
>
> Judging from the rhetorical nature of your questions it's pretty clear that
> you are not looking for an answer. So for the benefit of everyone on the
> list to which you cc ed. No I don't build my own cars. Well I guess
> technically one could say yes as I did build a Kit Car some 20 years ago.
> And it was a learning experience. The start up cost to build a single
> vehicle by hand is staggering. That is a big reason why Rolls Royce charges
> an astronomical price for the Silver Cloud. So your analogy is not an
> accurate one. Even the totally uninitiated buying or building unique test
> equipment could build their first amp at twice the cost of purchasing a
> comparable piece of equipment. The second would be breakeven, the third and
> succeeding at the cost of materials.
>
> To address the vain of thought in your question, setting aside the Kit I
> have only owned 2 vehicles in my entire life both were purchased 2nd hand.
> Part of the criterea in my selection are that they are durable and easy to
> maintain as I do most of the maintenance on the vehicles I own.
>
> Getting back to amplifier construction while the task at hand is not
> overwhelming it is not simple and there are many different facets with
> different levels of complexity. The simplest being Triode HF amps
> progressing through tetrodes then VHF techniques and finally UHF Cavity Amps.
>
> I have nothing against Dick Ehrhorn or Alpha-Power. I have seen their
> Amplifiers in action at many contest stations and have been very impressed.
> It just strikes me as lazy to lay down 5600 bucks for an 87A when for the
> same amount of money one could build a full rack of monoband amps that is
> just as capable and just as durable and come away with a complete
> understanding of what is going on inside the box inclusive of all the
> equipment's limitations.
>
> K1TA
>
>
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>
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