[ARC5] ARC-2 on Ebay

[Meir WF2U]

Hue and all,

I use a dual tunable active audio filter for CW with my ARC-2 (completely original, with the dynamotor). It makes the receiver usable even under crowded band conditions, using the peak and the notch features at the same time if necessary.
I didn't find the BFO lacking in injection, as long as the receiver is not overloaded - just "ride" the gain control - the same as with any receiver without a product detector and simple AGC.

73, Meir WF2U
Landrum, SC

⁣Sent from BlueMail ​

On Sep 14, 2020, 7:28 AM, at 7:28 AM, Hubert Miller <kargo_cult at msn.com> wrote:
>
>Dave, or anyone really, what did you do trying to improve selectivity?
>I see the ARC-2A has IF coupling caps of 12 pF and i wonder how low u
>can go on these. For my money the regenerative IF idea is out; i hate
>the way this performs.
>I have puzzled over the design, 3 RFs w/ 2 tuned LC and 4 IF  w/ 5
>tuned LC. But i see that all 3 RF are AVC'd and no IFs are AVCd. So i'm
>guessing Collins wanted super AVC control ahead of mixer, like to
>prevent blocking. I would have used 1 RF and an AVC amp. I note also
>that the gov't spec cares most about *minimum* -6 dB BW spec and let
>the -60 dB fall where it may, who cares. Note the -60 spec is for freq
>off center, not the modern way spec of *bandwidth*, so it's actually
>worse than it looks. Sorry.
>I admit i haven't actually looked at mine for some ages now. Is the
>dial resolution to 1 kHz ? Is there backlash to make this actually less
>wonderful ?
>The CW setup is a little bit of hassle, looks like. You and outstation
>have to be offset. As long as that's understood, okay. I think there
>was a ham rig that had similar CW way, that was the Dentron Station
>One, which never actually hit the market.
>-Hue Miller
>
>
>Sent from my Verizon, Samsung Galaxy smartphone
>
>
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