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2

ALC limits the the input power to the power amplifier (PA). Overdriving the PA would be bad: it might overheat, or exceed the voltage or current ratings of the components, eventually, or sometimes immediately, damaging the PA. Or it might just cause a lot of distortion and spurious emissions. If the radio has adjustable output power, often this controls the ...


4

ALC, in general, stands as an abbreviation for Automatic Level Control, which is a class of circuits designed to back-feed information about the output signal to an amplifier. The goal is to change the parameters of the amplifier so that a clean output that remains within certain parameters is attained. In normal HF transceivers, such a circuit will most ...


3

After a little bit of searching I discovered that this topology is called QER filter, where QER stands for Quasi-EquiRipple. This topology is attributed to Dr. Dave Gordon-Smith, G3UUR, who is also well-known for inventing a popular method (the G3UUR method) of measuring crystals. Apparently it was first described in The QRP Quarterly, Spring 2010 under the ...


2

Menu option for ssb filter (38?) should be "off", if no filter.


1

You will need a VOX circuit, and optionally, a VOX program. As long as the radio you are connected to is type certified, it is perfectly legal to connect it to a PC for the purposes of transmitting voice. First off, you need some aux cables, and if you PC has a combined speaker and mic jack, you need a TRRS splitter. You also may need a 3.5 mm to 2.5 mm ...


1

FYI C4FM is not allowed below 29 Mhz. This is because it is a wide band modulation and uses more than the allowable bandwidth for HF band transmission. Straight FM is not allowed below 29 Mhz for the same reason.


0

Use the normal PTT and audio connections. Similar to what you would use with a digital connection.


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