On Fri, Feb 15, 2013 at 7:59 PM, Manfred Mornhinweg <manfred@ludens.cl>wrote:
> Hello,
>
> may I weigh in on this matter?
>
> Intelligent design is to remote a heavy duty transformer option as was
>> done by Amp Supply. The built in transformer was fine for the casual op.
>>
>
> I would say that intelligent design is to get rid of big, heavy, expensive
> power transformers, and instead use switching power supplies. They are FAR
> more complex, sure, but they cost far less, weigh one tenth as much,
> provide tightly regulated output voltage, and short circuit protection.
>
You may like RF Splatter from switching power supplies but I sure do not!
I would much rather see a nice solid hunk of transformer in anything to do
with electronics than to see
*Shock hazard, RF noisy switching power supply of any type.*
OK, back in my rabbit hole.
Adrian KF7DYU
>
> Taking intelligent design a bit further, it involves using high efficiency
> power amplifiers instead of class AB, causing a 30 to 40% reduction in
> power requirements.
>
> And taking it another step further, it involves synthesizing the TX signal
> right at the 1.5kW level from its phase and amplitude components. The
> entire transmitter basically becomes a big RF MOSFET bridge controlled by
> an programmable logic array chip. The power source can be simply the
> rectified and filtered mains. This is current technology in the commercial
> area right now, but to most hams it sounds like lightyears ahead.
>
> Sure, sure, the homely glow of tube filaments (and plates). I love it too.
> But it's just not intelligent anymore. It was, 80 years ago.
>
>
> Manfred
>
>
>
> ========================
> Visit my hobby homepage!
> http://ludens.cl
> ========================
>
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