[ARC5] Another great Fleabay find

[Geoff]

For the discriminating collector

http://www.ebay.com/itm/370928263492?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_sacat%3D0%26_from%3DR40%26_nkw%3D370928263492%26_rdc%3D1#ht_1097wt_762

Carl


----- Original Message ----- 
From: "Bill Cromwell" <wrcromwell at gmail.com>
To: <arc5 at mailman.qth.net>
Sent: Sunday, November 03, 2013 2:27 PM
Subject: Re: [ARC5] AGC in the AN/ARC-5 receivers.


> On 11/03/2013 11:15 AM, Kenneth G. Gordon wrote:
> -----snip--
>> It has become abundantly clear over the past several months that using an 
>> ARC receiver withOUT also installing an effective AF gain control keeps 
>> the receiver from reaching its most useful potential, at least for AM 
>> work.
> --snip-----
>>  Ken W7EKB
>
> Hi,
>
> There are several much later designs including some in solid state that do 
> NOT have an audio gain control. In other cases the recommendation is to 
> run the audio all the way up and control gain with the RF gain control and 
> AGC turned off. That is for CW of course. And with Hi-Z cans. Any kind of 
> crude limiting is useful for preventing a "blowout" - including diode 
> clamps. Hi-Z cans give us a head start in that regard.
>
> My own thoughts from running radios that way is to include the audio gain 
> and run near wide open and use the RF gain as suggested. With a choice of 
> levels on the audio amp we might set the radio up for a little better gain 
> distribution sometimes. In practice that has worked best for me. AM/SSB 
> are better with AGC applied. I don't know about the digital modes and AGC.
>
> 73,
>
> Bill  KU8H
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