The Nautel, GatesAir, and BE all use lumped constant combiners.
Don W4DNR
Quoting Steve Thompson <g8gsq72@gmail.com>:
I believe, in transmitters of this type, that the modules aren't
combined in the same way we're used to in the likes of Quadra, PW-1
or SPE type amps - in the AM txs I think it's more like the module
outputs are connected in series akin to stacking PSUs to get a
higher voltage.
Steve
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:
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