[TenTec] Orion gain setting

[Barry N1EU]

It's possible that running RF Gain at 100 may override your threshold
setting.  The TT Engineers would know for sure.

Barry N1EU

On Thu, Nov 10, 2011 at 11:20 AM, Scott Harwood <scotthsr at earthlink.net> wrote:
> To get to the “Prog” setting I gave previously for my 566, I disconnected the antenna and shorted out the antenna connector.  I then increased the AGC threshold until the S meter read S9.  This was 38.30 in my case.  It is my understanding from some papers I read earlier on the subject, the AGC would then only act on signals above S9.  My 566 certainly seems to operate in that manner when I used my “Prog” setting.
>
> Scott K4VWK
>
>
>
> -----Original Message-----
>>From: Robert Carroll <w2wg at comcast.net>
>>Sent: Nov 10, 2011 10:17 AM
>>To: 'Discussion of Ten-Tec Equipment' <tentec at contesting.com>
>>Subject: Re: [TenTec] Orion gain setting
>>
>>Since we are on the AGC topic I'll ask a question.  In days of yore when
>>tubes were king, there were several types of AGC, with only a few having an
>>AGC anywhere nearly as sophisticated as the Orion.  The most common operated
>>by doing nothing until the RF signal exceeded a threshold. When the
>>threshold was exceeded, RF and maybe IF gain would be decreased.  The audio
>>gain might be turned down as well.
>>
>>I have an early 565, and there have certainly been many changes to the
>>details of how the AGC has worked as the various software loads have come
>>out.  The manual which originally came with the 565 had a very vague AGC
>>description with some mention of RF and IF gain, but to me it indicated a
>>scheme very different from that of a 1950's tube set:
>>
>>"The threshold value in the AGC system acts like an IF gain control for the
>>receiver chain--turn the value low (like to .37 uv) and the receiver gain
>>comes up, as do the signal levels."
>>
>>I suppose it was the "up" which initially caught my attention. To me this
>>sounds a little like what used to be called "signal expander" operation.
>>Can anyone comment on whether this description is correct and how it relates
>>to the "compress a lot when the signal gets hot" operation of the SX28s
>>causing shelf sag in my basement?
>>
>>73
>>Bob W2WG
>>
>>-----Original Message-----
>>From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
>>On Behalf Of Rsoifer at aol.com
>>Sent: Thursday, November 10, 2011 9:25 AM
>>To: scotthsr at earthlink.net; tentec at contesting.com
>>Subject: Re: [TenTec] Orion gain setting
>>
>>Right on Scott.  Not only that, but this thread seems to be confusing the
>>565 and the 566.  They're similar, but not identical as to settings.
>>
>>73 Ray W2RS
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