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

[millerke6f at aol.com]

Hi


Same problem with the R105/ARR15   clever radio with the variable IF and all, but no selectivity as such.  You might want to employ regeneration in one of the IFs.  It's an easy scheme to apply and easy to remove and you can set the regen level and leave it set so no holes are required if you leave the pot inside and just glued to something with E6000 glue.  This was a common trick back in the "Modify Days" of surplus.  
I guess it's time to dig out my ARC2 and fire it up again.  Now if I can just find my 28/50 amp supply?


73
Bob, KE6F



-----Original Message-----
From: Kenneth G. Gordon <kgordon2006 at frontier.com>
To: ARC-5 <arc5 at mailman.qth.net>
Sent: Sat, Mar 22, 2014 11:55 am
Subject: Re: [ARC5] ARC-2 Defines "Broad as a Barn"


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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