Crit,
It depends on the level. As I remember from my Corsair days, the
attenuator is between the antenna and RF amplifier. If the RF amplifier
input is being overdriven, it will still be if the gain is reduced, but
won't be (at least as badly) if the attenuator is used first. If you are
well within the RF amplifier linear range, the attenuator will actually
have a somewhat negative impact on noise figure compared to the gain,
but it won't be noticable if the external noise dominates, as it usually
does on HF.
It is somewhat similar to my description of gain control in "Getting to
Know Your Radio" in June 06 QST.
73, Joel
Joel R. Hallas, W1ZR
jcharley@bellsouth.net wrote:
Gentlemen and Ladies.
Maybe a silly question but ...
Is there an actual difference in results if I reduce RF gain or use the
attenuator on my Corsair II.
In researching the topic on the reflector I see both actions listed and in
different orders,
Attenuator first then RF gain, and vice versa. Any science here or just
personal preference?
Thanks.
73/Crit/K4BXN
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|