>Without a stable, low impedance bias voltage, even assuming the amplifier is
>not designed to ever draw grid current, many of today's transceivers could
>not be used as drivers.
>
>The reason is that many have spikes when first transmitting. That spike
>will produce severe splatter in those amplifiers that assume it will never
>happen.
** This situation is virtually guaranteed to happen if an AB1
amplifier's G1 DC bias is adjusted using AØ-mode. However, if the DC
grid bias is set so that no grid current flows on the first dit of a
string of dits, the sky is absolutely, positively, 100% guaranteed not to
fall.
>
>So, your "perfect" amplifier will only be able to be connected to a
>"perfect" transceiver.
** Only if a less than perfectly competent operator is in the driver's
seat.
>
>But, what happens when you step on the tail of Tiger the cat, who yowls into
>the mike. Since you have no agc (distortion), the input level will exceed
>the drive level you have set and grid current will be drawn. At that point,
>your neighbor minding his own business 60 kHz down frequency will hear
>the problem.
>
** I have heard contest operators whose vocal powers easily surpass
those of domestic cats.
>I suppose one could operate a 10 kw final at 1.5 kw so that even the
>overdrive from normal would never happen - but the few hams I know who have
>big amplifiers seem to extend themselves once in awhile (whenever they need
>to).
** That is the difference between a competent radio operator and a
schmuck.
>
cheers, Colin
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