[R-390] test equipment question

[Bill Kirkland]

I haven't done my R390/a's yet but I have done several sp-600's (ooops wrong 
group).

Once you have done the resistance checks and voltage checks I think you are 
half way there.
If you have to dig into a "module" I gather extension cables would be handy.
These are cables which allow you to remove the module from the unit but keep 
it
plugged in and up and running.  I believe it was Fair Radio that used to 
sell a connector
kit for making these up.


>From: "Cecil Acuff" <chacuff at cableone.net>
>To: <stoth47 at yahoo.com>,<r-390 at mailman.qth.net>
>Subject: Re: [R-390] test equipment question
>Date: Fri, 13 Feb 2009 08:06:51 -0600
>
>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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