[R-390] Spectrum Analyzer

[Cecil Acuff]

Sounds like a good choice.  I use one quite often.  It's handy for looking 
at oscillator levels to be sure they are clean and somewhere near the proper 
output level.  Stage gain.  Mixer outputs.

You will find things to use it for and if you work on other things it will 
come in handy.  If you don't now you will once you have the ability to do 
so.

Cecil
----- Original Message ----- 
From: "Ben Loper" <brloper at gmail.com>
To: "Shoppa, Tim" <tshoppa at wmata.com>
Cc: <r-390 at mailman.qth.net>
Sent: Monday, March 14, 2011 8:28 AM
Subject: Re: [R-390] Spectrum Analyzer


> The one I'm looking at is an HP 3585A and covers 20hz to 40 Mhz so I'm
> thinking thats exactly what I want.  I'm going to look at it today and if 
> it
> passes it's Start up tests I think I'll get it.
>
> On Mon, Mar 14, 2011 at 8:23 AM, Shoppa, Tim <tshoppa at wmata.com> wrote:
>
>> Many surplus spectrum analyzers are not (by nature) HF spectrum. Many of
>> the ones you'll see on the surplus market are VHF/UHF range. They can be
>> adapted to HF with an upconverter.
>>
>> If you want to see how squirrely a typical 40's/50's/60's/70's ham
>> transmitter looks during keying it might be of some use :-). Most likely,
>> you do not want to know! Almost all screen tube PA's and drivers of that 
>> era
>> will show some parasitic oscillation during keying.
>>
>> For receiver alignment etc. a sweep generator is far more useful than a
>> spectrum analyzer. Here on this list we tend to focus on the lab-type HP
>> equipment but realistically a Sencore-type TV/Radio service shop-oriented
>> unit will do fine.
>>
>> Tim.
>>
>> -----Original Message-----
>> From: r-390-bounces at mailman.qth.net 
>> [mailto:r-390-bounces at mailman.qth.net]
>> On Behalf Of Ben Loper
>> Sent: Monday, March 14, 2011 9:15 AM
>> To: r-390 at mailman.qth.net
>> Subject: [R-390] Spectrum Analyzer
>>
>>  I found a good deal on a spectrum analyzer, but I'm wondering how much
>> use
>> it will be working on boat anchors.  Are there many alignment procedures
>> that would benefit from a spec analyzer or should I pass on it.
>>
>>
>>
>> “A fire has burned my hut to the ground -- how much better to see the
>> moon!"
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>
>
>
> -- 
>
> “A fire has burned my hut to the ground -- how much better to see the 
> moon!"
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