[R-390] R390A RF deck resistor and slugs

ngietz at mymts.net ngietz at mymts.net
Fri Jan 23 01:37:09 EST 2015


Hi all,
    I’ve been attacking out-of-spec resistors and caps in this Teledyne RF deck with soldering iron, head magnifier, forceps, and dental picks with pretty good success so far.  But I’ve landed on a mystery in this enigma.  In the Cal. Osc. section on V205B, the R228 resistor off anode pin 6 is 56K.  (It ohmed out at 62-point-something thousand, so has to come out regardless.) The schematics and all the parts lists I’ve found specify 5600 ohms, a tenth of what’s there.  An orange band for red is probably an easy misread on the assembly line.  Should I follow my instincts and put in 5600?
    Also, an answer to one of my previous questions, about some RF slugs I received with brass slot-head screws instead of the Bristol spline heads.  Phil at Fair Radio says these must be for an R388 or –390, so I put it down to a miss-order, and some correct slugs are on their way.
    But what’s your advice on R228?
    Nelson Gietz


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