>
>>Message text written by "Steve Thompson"
>>
>>>And FT990 and .. and...In practice, it's likely that the menu power
>>setting simply sets a reference level in the ALC system so you retain all
>>of the dynamic problems.<
>>
>>Is the FT-990 a known offender? Mine doesn't seem to generate anything
>>untoward when set for about 45-50W output, and drives an 87A very happily
>>with no aggro. Maybe I need a better scope <g>.
>>
>>73 John
>>GW4FRX
>
>
>Mine certainly offends with a nasty little overshoot of a few 100 us on
>rising edges whenever there is any ALC action. It depends on the excess
gain
>in the transmit chain and varies with power and frequency. When wound down
>to drive a transverter, it makes the rig too dirty to use in our contest
>station with spitching covering about 30kHz.
The quickest way to correct ALC overshoot is to back off the mic. gain
until the ALC indication is barely there.
>. Over 24 hours, the gain varies
>somewhat and it's asking for trouble to have all the ops keep tweaking the
>mic gain.
Amen. A high percentage of contest men seem to be infected with terminal
''Pump Up the Volume'' disease -- much like CBers.
cheers, Steve
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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