[TenTec] Orion with V2 rf gain

[K Van Horn]

Hi Grant,

Thank you for your reasoned approach! I greatly missed having the meter  
movement go
upward as the RF Gain was altered(to know where I was at signal strength  
wise), but I
cannot write elequently as you do on the subject about why I feel this is  
so important!!

Please Gary, leave it like it is now!

Thanks and Merry Christmas to ALL!

Kirby, K7EC


On Fri, 23 Dec 2005 20:25:27 -0600, Grant Youngman <nq5t at comcast.net>  
wrote:

>>
>> With today's technology, it's not necessary to use this
>> indirect method.
>> Let's bury this dinosaur once and for all.
>
> Not so fast.
>
> The point of the S-Meter movement upward, as I recall the endless
> discussions of all of this regarding the Orion, is to give you a notion  
> of
> the MINIMUM signal that will impact AGC, via the THRESHOLD setting.  If  
> you
> leave the S-meter reading unaffected, what does it tell you ... Not much.
>
> This "artifact of a bygone era" is telling you what signal level is  
> required
> to affect AGC.  For example, if you have an s-7 average noise level, one
> might, to keep things a bit quieter, increase THRESHOLD until the meter  
> read
> about s-7. At least that was the point as I recall it, and I've always  
> found
> it useful for that purpose.  And why not?  You are unlikely to hear any  
> rare
> DX below this level, anyway.  And it sure keeps the nosie level down,
> without any reduction in RF (IF) gain.
>
> The coupling of RF GAIN and THRESHOLD in one control in later Orion  
> firmware
> releases was done to satisfy a lot of people who couldn't get their brain
> straight about THRESHOLD (the level at which AGC action would begin, RF  
> GAIN
> (really an IF gain control), and the fact that there were two separate
> controls with quite different functions.
>
> So T-T simplified things a bit by providing some THRESHOLD shift as RF  
> gain
> is adjusted.  But you can still set threshold as you like, since the  
> control
> is still there.  Perhaps, once again, some refresher on why this is set  
> up
> to do what it does would be in order :-)
>
> Grant/NQ5T
>
>
>
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