[ARC5] ARC-2: Smart People Needed

[Jay Coward]

Dave, 
It sounds like the "why" is what you just said : "without having to fiddle with tracking a LO at the mixer". The "how" is interesting. Been a looong time since I had ARC-2's.Forgot how technically interesting they are. Have you figured out the trick to get the dynamotor back in the chassis? Took me a bit of frustration until I found that you sort of had to roll it into place.
Jay


-----Original Message-----
From: David Stinson <arc5 at ix.netcom.com>
To: arc5 <arc5 at mailman.qth.net>
Sent: Wed, Apr 2, 2014 2:56 pm
Subject: Re: [ARC5] ARC-2: Smart People Needed



----- Original Message ----- 
From: "Robert Eleazer" <releazer at earthlink.net>

> What was the idea behind the variable IF, 1.0 to 1.5 MHZ? \
I have no idea... The manual tells how it works,
but nothing on "why."  The scheme does keep 
the transmitter and receiver locked to the same freq 
without having to fiddle with tracking a 
"Local Oscillator" at the mixer.
The same PTO and multiplier stages run both.
Kinda reminds me of a Direct Conversion set... sorta.
 
> And is the ARC-2 IF tighter at 1.0 MHZ than at 1.5MHZ?
Nope.  After alignment, it looks like the same 
"side of a barn" curve from one end to the other.
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