[R-390] Out of the closet!

[Les Locklear]

Syringe or toothpick, sparingly. I used oil on the slides on my R-388's and 390 series. A little bit of sunthetic oil goes a long way.

Les Locklear
Gulfport, Ms.
Dx'ing since '57


  ----- Original Message ----- 
  From: Ben Loper 
  To: Les Locklear 
  Cc: Paul Galpin ; R-390 at mailman.qth.net 
  Sent: Wednesday, January 20, 2010 4:09 PM
  Subject: Re: [R-390] Out of the closet!


  How do you apply the oil to the gears, I'm lubing a completly dry R-388 and don't want to make a mess of it.  How about the slides, no grease there either?


  On Wed, Jan 20, 2010 at 4:01 PM, Les Locklear <leslocklear at cableone.net> wrote:

    Paul,

    The last PTO is a Progressitron Corp. PTO. It is a conventional "corrector stack" type PTO similar to the Collins, Motorola and Dubrow.
    The only different design was the Cosmos PTO.

    Les Locklear
    Gulfport, Ms.
    Dx'ing since '57



     ----- Original Message -----
     From: Paul Galpin
     To: R-390 at mailman.qth.net
     Sent: Wednesday, January 20, 2010 1:56 PM
     Subject: [R-390] Out of the closet!


     Hi there!

     Some many years ago, I was given a 390A to repair - symptoms: dead.  With
     help from this list, I got it going again, and, on the day of moving to my
     present retirement address, I was offered it at a good price. Unfortunately,
     finances were very doubtful at that stage so I had to pass on it.
     Since the I have been lurking on the list, drooling with envy!

     Lady Luck has been around, and today I took possession of 2x 390As, one
     working, the other not, that's what the seller says.

     OK, I know about the obvious things, like C553(?) to protect the filters,
     but what can I learn from the ID plates?

     "Working" has

     Ser No 2114
     Imperial Electronic Corp
     37856-PC-63

     PTO ser No 1551
     Dubrow Electronic Industries
     Type 798 BM101
     this label appears to be stuck over a different previous one.


     "Non-Working" has

     Ser No 3123
     Teledyne Corporation
     35064-PC-62

     PTO Ser No 7867
     Type 798
     P???R??STRO???Corp

     What does this tell us?

     The 390A I worked on long ago had the gears smothered in grease, put on by
     the handful.  These two sets that I have just got have very clean gears,
     with a trace of oil only. Which is correct? Which is typically original?


     Paul Galpin
     ZS2PG


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