Message-ID: <000201c1aa99$32039ba0$1b9793c3@drawing>
From: "David Sparvell" <sparvell@rftechnology.co.uk>
To: rsgb_lf_group@blacksheep.org
References: <200201310309.g0V39o408009@galahad.joust.net>
Subject: Re: LF: Ampliphase
Date: Thu, 31 Jan 2002 20:48:40 -0000
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Sorry about what is now becoming an OT thread.


Steve said:-

> On reflection, the same could be achieved very much more simply nowadays.

But remember the Ampliphase dates back to a time before the advent of a
practical PWM modulator. Given the ability to control high voltages and
currents with solid state switches, I can't see the Ampliphase concept being
translated into a modern commercial design.

Although a solid state modulator would be vastly superior to the original
valve unit, it still needs a high degree of skill to keep it at peak
performance. Remember the Ampliphase was called "The Transmitter which
Broadcast Engineers loved to hate!".

However, having said that, I take my hat off to the originators of the
Ampliphase system for their "lateral thinking" to solve what was seen a
shortcoming in traditional AM transmitter designs of that era.

By the way, does anyone know of the current fate of the Ross Revenge?

Regards


David G4FTC