[TenTec] Orion II Questions

Carl Moreschi n4py3 at earthlink.net
Fri Dec 19 07:42:34 EST 2014

Barry makes some good points on why to do this.  As far as the rush of 
band noise between words, that's easily fixed by using slow AGC.

But the biggest problem with the scheme of using high audio gain and low 
RF gain is you can still get blasted by a very strong signal as you tune 
the band.  With normal audio and high RF gain, the radio's AGC will stop 
you from being blasted with a strong signal.  And you will also find you 
rarely need to change the volume this way.

I have an old Collins 75A1 receiver that I still listen to once in a 
while.  For CW and SSB, it has no AGC system at all.  So the way you use 
this is to run the audio gain full and use the RF gain as the volume 
control.  Barry's scheme is a partial use of this old method.  It just 
to me seems very archaic to go back to a scheme that was used in the 
1950's.  The AGC in modern radios is wonderful.  But don't use fast AGC 
and you won't have AGC compression.

Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549

On 12/19/2014 5:42 AM, Richards wrote:
> Could you please elaborate on this, Carl. I am NOT looking to start an
> argument, but am truly curious about this aspect. Barry's suggestion
> seems to be de riggeur or conventional wisdom for the Omni VII, and I
> wonder why not for the Orion II. I know they are different rigs, but the
> approach seems prima facie valid for both rigs.
> Thank you. I always appreciate your concise and to the point
> explanations. One of my projects this week was to assemble a whole bunch
> of previous comments from you, Bob K4TAX, Rick DJ0IP, Stuart and some of
> the others, into a condensed, combined document about the Omni VII. Good
> stuff.
> Thanks.
> --------------------------------- K8JHR--------------------------------
> On 12/18/2014 7:48 PM, Carl Moreschi wrote:
>> I completely disagree with setting the audio gain high. This almost
>> completely defeats the beautiful AGC system in the Orion.
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