<jtml@lanl.gov>,
"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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