[R-390] Them sneaky resistors

[Phil Atchley]

Hi. =20
Since I've been waiting for the PTO and the capacitors to arrive so I =
can
finish the overhaul of this R-390A receiver I've had time to spend a =
little
extra time checking and re-checking components in such places as the IF
module, audio module etc.  So far everything has checked in spec =
resistance
wise.  Except that is for one resistor in the screen circuit of V508.  =
It
should be 47K and was 104K.  Now, I went through that amplifier very
methodically from one end to the other THREE times before finding it on =
the
third trip through the module. =20

Now, either a gremlin crawled into that resistor between the second and =
the
third check OR I somehow overlooked it on the first two passes, and I =
went
through it with a fine toothed comb!  Since V508 is the AGC amplifier =
this
could cause weak AGC action when I finally get the set finished. =20

Moral of the story?  You can't check those old resistors enough times =
8^)  =20

73 de Phil, KO6BB

****************************************************
*  DXing THE WORLD WITH THE FOLLOWING EQUIPMENT.   *
*  RECEIVERS:                                      *
*    '67 EAC R-390/URR Surplus Receiver with a     *
*            HAMMARLUND HC-10 Sideband adapter.    *
*    YAESU VR-5000 Wideband,  REALISTIC DX-392.    *
*    Home built Longwave "Hybrid" CW receiver.     *
*    Others which pass thru or are waiting repair. *
*  ANTENNAS:                                       *
*    Coil Loaded 18.5 Meter Long Sloper.           *
*    Roof mounted Hustler 6BTV 6 band Vertical.    *
*    Scantenna Scanner antenna at 7 Meters high.   *
*  LOCATION: Merced, Central California.           *
****************************************************




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