[R-390] Alignment of the Mechanical Filters and IF with aSpectrumAnalyzer

[Ted Breaux]

Thanks for the info.

ted b
----- Original Message ----- 
From: "Roy Morgan" <k1lky at earthlink.net>
To: "Leigh Sedgwick" <bipi at comcast.net>; "R-390 Group" 
<R-390 at mailman.qth.net>
Sent: Monday, December 17, 2012 9:29 PM
Subject: Re: [R-390] Alignment of the Mechanical Filters and IF with 
aSpectrumAnalyzer


>
> On Dec 17, 2012, at 5:17 PM, Leigh wrote:
>
>> Mack,
>>
>> I have a document, ST 32 - 152, "Visual Alignment of Radio  Receivers, 
>> R-390/URR and R-390A/URR", dated March 1969, US Army  Intelligence 
>> School, Fort Devens, MA.
>
> Note:
>
> That document is in places very specific to the equipment used.  In 
> particular, it gives instructions on how to manage the sweep images  from 
> the sweep going "up" and then coming "down" in frequency.
>
> Many sweep generators nowadays (or even from some decades ago) have  the 
> equivalent of retrace blanking to eliminate the trouble of  accounting for 
> both up and down traces.  With any of these systems,  one important thing 
> is to get the frequency sweep speed down low  enough to avoid distortion 
> in the picture you get.
>
> That document is online already:
> www.r-390a.net/faq-refs.htm
>
> Roy
>
>
> Roy Morgan
> k1lky at earthlink.net
> K1LKY Since 1958 - Keep 'em Glowing!
>
>
>
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