[ICOM] 7800

[Jerry Flanders]

Elecraft sells a little 50 uV signal generator that can be used to 
check your S-meter's accuracy and from time to time to verify that 
your receiver's sensitivity has not changed.

They have two models - one for 40 M only and another for 80+40+20.

Jerry W4UK

At 09:05 PM 7/2/2008, you wrote:
>My S meter on the 7800, Im using
>without the pre-amp,  is rather conservative,
>and seems to be more conservative lately. I remember
>when I first got it, signals 20-30 over were more
>common on 40 meters, for example. I dont remember
>if the pre-amp was on or not when I did this
>observation.
>
>When I had the radio upgraded, Icom said it was
>no problem, back then,
>
>but it seems as though signals are a little less
>today. EG: used to get 40-60 over signals
>on 80m when living in Fl, whereas now
>I get up to 20, and occassionally a 30.
>I wonder if the agc is holding back or
>something. Now live on a mountain in TN.
>
>Antennas similar to those used in FL.
>Using a folded dipole up 60 feet, a 160 meter dipole
>up 70 feet, and a 10m vertical up 110 feet.
>
>The receive sounds great, but I wonder if the
>front end is particularly susceptible to static buildup
>on wire based antennas....
>
>Wonder what other users find, is it just a more
>accurrate S meter (being digital based), perhaps
>being on top of a mountain (cumberland plateu)
>
>or is there an adjustment for the agc that
>is digitally controlled (other than fast slow med)
>or holding down buttons during these settings.
>
>Have tried fast med and slow settings, roofing filter
>and bandwidth settings, all with mainly the same
>overall receive.
>
>Any users who have found this or have ideas
>about this
>----