[AMPS] interesting SS amps

[measures]

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        "AMPS" <amps@contesting.com>
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>
>Solid state amplifiers have their advantages. I for one like the fact that
>they are inherently wide band and can typically operate from 1.8MHz to
50MHz
>into 2.5:1 vswr without tuning. To me, on the air tuning (especially in
pile
>ups) is extremely obnoxious.

€  My guess is that much of the pileup interference is intended to be
obnoxious.  How hard is it to slide 10 or so kHz to an unused freq to do
a tuneup.?

> They also have the potential to be much
>lighter, more compact,

€ The 1500w heat sink for a 1500 watt solid-state amp is hardly compact.
.

>and less expensive than tube amps.

€  Haver you priced MRF-430s recently?

>As soon as devices
>are developed that can run directly off of rectified line voltage (and
>they're getting close), power supplies for these will be cheap and very
>light weight.

€  Good point.

> Very high efficiency is also possible

€  45% eficiency on 10m is high?.

>with envelope
>elimination/restoration techniques and the like. Solid state devices also
>outlast tubes.

€  Certainly not in near-field lightning strikes.

> Linearity is not quite as good but still plenty good enough.
>I'm excited about the potential for this technology.
>
>Dave
>K0QE
>
>
>
>	----------
>	From:  measures [SMTP:measures@vcnet.com]
>	Sent:  Tuesday, February 15, 2000 12:48 PM
>	To:  John T. M. Lyles; AMPS
>	Subject:  Re: [AMPS] interesting SS amps
>
>	€  If the radio world had been using solid-state amps since the very
>	beginning, and a small company in San Bruno announced that it had
>	developed a much more efficient, HF linear-amplifying device that
>	operated from 22kV at 45A  (the 8973 tetrode),  that operated in
>	high-temp enviorens, what then?   Would the electron-tube be hailed as a
>	monumental technical breakthrough?
>
>	-  Rich...,......

-  Rich..., 805.386.3734, www.vcnet.com/measures.
end


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