[R-390] test equipment question

[Cecil Acuff]

If it's just a matter of cleaning them up, checking and replacing tubes and then alignment you have it covered.  If you have to do any troubleshooting I find myself lost without an O'scope, frequency counter and my trusty cap analyzer.  That's not to say it can't be done without those items because guys do it every day.  Just like any job the tools make the job a bit easier and certainly more pleasurable.  If I had to leave any of the above on the table I would keep the O'scope...  One can be bought cheap usually...ebay is a good source for test gear cheap.  Most all I use came from there and it's all HP and Tektronics.

Cecil..
K5DL
  ----- Original Message ----- 
  From: Steve Toth 
  To: r-390 at mailman.qth.net 
  Sent: Friday, February 13, 2009 2:28 AM
  Subject: [R-390] test equipment question


        Some questions for the veteran radio techs - I'm organizing to start work on a couple of R-390A's I just acquired.  What test equipment do I need (as opposed to "would like to have") to get these babies running??

        What I have now:

        TV-7/U tube checker and spare tubes
        AN/URM-25D signal Generator
        Heathkit VTVM
        Digital VOM
        Digital Dial / Direct Freq Meter good to 50Mhz

        Looking at the Y2K manual, pg. 1-12 and looking thru the stage-by-stage troubleshooting steps in Section 5, three other items are mentioned:

        1.) RF Multimeter - can I use an adapter with the VTVM or VOM?  How?
        2.) Audio Oscillator that covers 425-3500hz @ 100mv
        3.) Oscilloscope that can cover .2 to 2vdc/cm

        If I do need'em what inexpensive models should I look for at ham flea markets (got a big one coming up in the Northwest), places like Fair Radio, on Craigslist and (last preference)Epay?

        Thanks.

        -- Steve 
        Woodinville, WA
        If you can read this, thank a teacher; if you're reading this in English, thank a military veteran.
       




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