[ARC5] ARC-2 Defines "Broad as a Barn"

[mac]

I use a BC-946 with mine as a Q-5er. Works great!

Dennis D.  W7QHO
Glendale, CA

****************

On Mar 22, 2014, at 8:42 AM, Bruce Long wrote:

> Dave, the selectivity curve will "look" much better and will be  
> easier to compare against other receiver selectivity curves if you  
> plot the log of amplitude.
>
> Plot point = 20 log ( Vout/Vmax)   Where Vmax = 4v
>
> My applogies if this is obvious to you.
>
>
>
>
>
> On Saturday, March 22, 2014 11:19 AM, Kenneth G. Gordon <kgordon2006 at frontier.com 
> > wrote:
>
> On 22 Mar 2014 at 8:08, Kenneth G. Gordon wrote:
>
>> On 22 Mar 2014 at 0:33, David Stinson wrote:
>>
>>> I have not done any alignment on the IF,
>>> so the results shown in this chart are "as found:"
>>> http://home.netcom.com/~arc5/ARC-2/ARC2IFOrig.jpg
>>> I think "W-I-D-E" is putting it mildly ;-).
>>> So this is my starting-point for my fiddling-to-come.
>>>
>>> Impressions, suggestions?
>>
>> Looks about what I had expected.
>>
>> What is the IF frequency?
>
> Well, I just tried fo find my copy of the ARC-2 manual, and  
> can't...at this
> point. I was reminded that the ARC-2 has a variable IF: i.e., it  
> varies as you
> tuned the range. This, of course, makes it unlikely that a "Q-5er"  
> will work
> with it.
>
> Secondly, I was also reminded that there is a way to non-destructively
> narrow up the IF by "adjusting" some coupling capacitors or parallel
> resistances in the circuit, but I have no details on that either.
>
> Still looking...
>
>
> Ken W7EKB
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