[Amps] FCC Denies Expert Linears' Request for Waiver of 15 dB Rule

[MU 4CX250B]

I remember that with the Drake C-Line, some ops would short the T4XC
ALC line, which would increase the power output to 175W. Most vacuum
tube transmitters I am familiar with did not have a power adjustment.
Even the mighty solid state Collins KWM-380 lacks a power adjustment.
73,
Jim w8zr

Sent from my iPhone

> USING ALC to control drive level for a power amplifier is a CAUSE of splatter and clicks. ALC should NEVER be used to set drive level. The ONLY good reason for using ALC between rig and power amp is to protect solid state output stages from damage due to a fault in the antenna system.
>
>> Radios with slow-acting ALC are also famous for causing IMD blasts and key clicks without even needing an amp, and there are many. But the most usual way of producing lousy signals is by intentionally defeating the ALC of the transceivers. In my environment they call it "liberating" the radio, because the poor radio was tied down to just 100W by the evil manufacturer, and by defeating that "brake" it can produce 150W or so, when turning the mic gain to full and then screaming into the mike, right?
>
> I can't imagine what you are talking about. Since the days of separate TX and RX, I don't remember ever seeing a rig that didn't allow adjustment of output power.
>>