[Amps] Time to back up- SS and autotune

[qrv at kd4e.com]

Is this an example of what is being discussed?

http://www.fmamtv.com/products/Radio/BE%20AM10A.html

> That is becoming common practice. Modular transmitters.  Just plug in
> the modules you want to get the power you want and I believe they have
> been hot swappable for some time. .
>
> I had never thought of switching the modules in and out, but at 250 W
> per step it'd be a pretty smooth transition, albeit they may do some
> filtering.  I wonder about switching pulses?
>
> 73
>
> Roger (K8RI)
>
> On 12/17/2016 9:36 AM, Bill Turner wrote:
>> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>>
>> On Sat, 17 Dec 2016 05:37:07 -0500, K8RI wrote:
>>
>>> it's "relatively easy" to parallel properly designed circuits through
>>> properly designed combiners for the power to be run that give excellent
>>> linearity, rugged with minimal protective circuitry, and good efficiency
>>> at a reasonable heat load that is easy to get rid of.   (QUIET!)
>> REPLY:
>>
>> A little OT but not much:  Several years ago I was fortunate enough to
>> get a tour of KFI, the AM broadcast station in Southern California.
>> They were running a Harris DX50 transmitter which was all solid state
>> and produced 50 kW output. It uses a bunch of 250 watt modules which
>> were combined and switched in and out at an audio rate to produce the
>> modulation. No separate modulator.
>>
>> Just shows what low power amps with combiners can do.
>>
>> 73, Bill W6WRT