[AMRadio] 4-1000A Grounded Grid Class-C


Bry Carling bcarling at cfl.rr.com
Thu Oct 3 09:13:36 EDT 2013


If the amplifier has a gain of 10 then I am guessing you are not going to increase the modulation by more than 10% by modulating the drive signal. I'm on mistaken?

Bry Carling
http://af4k.com

> On Oct 3, 2013, at 8:56 AM, Larry Szendrei <ne1s at securespeed.us> wrote:
> 
>> On 10/3/13 8:31 AM, Bry Carling wrote:
>> I'm guessing 90% modulation is hard to distinguish from 99% mod on the air...
>> 
>> Bry Carling
>> http://af4k.com
> True, but you'll definitely notice a difference between 90% vs. 120-150% on positive peaks. There are plenty of signals on the air with positive peaks exceeding 120%, that don't exceed 100% on negative peaks, due to the natural asymmetry in the male voice. You need a transmitter with the headroom to allow it, though, and a plate-modulated grounded-grid stage won't (without also modulating the input signal, that is).
> 
> 73,
> -Larry/NE1S
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