[ARC5] Another great Fleabay find

[Ian Wilson]

I do rather like that shade of green .. wait .. time for repeat eye test ..

73, ian K3IMW


On Sun, Nov 3, 2013 at 12:05 PM, Geoff <geoffrey at jeremy.mv.com> wrote:

> 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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