[ARC5] Lopsided modulation

[Charles]

My "ARC-5" transmitters do the same thing with screen (only) modulation. A 
couple of hams with spectrum analyzers have told me that one sideband is 
considerably stronger than the other.
I've been also told it's incidental FM or PM of the oscillator. In any 
event, especially with my 4x 4-125A linear, it puts out a clean and 
intelligible signal through a low-Q off-center-fed dipole to other AM'ers :)

Charles
WB3JOK/0 since 1976

-----Original Message----- 
On Sat, Feb 24, 2018 at 2:07 PM, AKLDGUY . <neilb0627 at gmail.com> wrote:

> FM does not seem to be present in either his signal or mine. The carriers
> are straight lines on the waterfall display. Actually, there is one
> operator on the net whose carrier is a fuzzy line when he speaks, but his
> sidebands are symmetrical. I'm stumped.
>
> Neil ZL1ANM
>
> On 25/02/2018 10:30 AM, "Richard Knoppow" <1oldlens1 at ix.netcom.com> wrote:
>
>>     That affects the upward vs downward modulation but not the strength
>> of the sidebands. A frequent cause of asymetrical sidebands is incidental
>> FM. If the oscillator is being affected by the modulation it can be the
>> cause.
>>     The scope display will not show assymetry of the upper vs lower
>> sidebands although it will certainly show assymetry of upward vs downward
>> modulation.